Pneumatic and Electronic Controls - ABB
We provide various products, including valves, motion control, electrical enclosures, HMIs, power tools, and electric control systems. In addition to these products, we offer compressed air products to power pneuma...
Molded case circuit breakers (MCCBs) protect higher-current circuits, typically 15 to 2,500 amps, in panelboards, switchboards and equipment.
MCCB Features
- Thermal-magnetic trip units – standard protection
- Electronic trip units – adjustable settings
- High interrupting ratings – high fault currents
- Accessories – shunt trips, auxiliaries and handles
Choosing an MCCB
Select frame size, current rating, interrupting rating and trip unit. Confirm lug sizes and mounting.
Centro supplies molded case circuit breakers.
Related categories: Circuit Protection | Circuit Breaker Enclosures | Circuit Protection Accessories | Circuit Monitoring | Disconnect Switches
Circuit breakers protect circuits from overloads and short circuits, and you can reset them after a trip. They're the main overcurrent protection in control panels, switchboards and distribution equipment.
Breaker Types
- Miniature circuit breakers (MCBs) – DIN rail control circuit protection
- Molded case circuit breakers (MCCBs) – higher currents
- Supplementary protectors – equipment protection
- Motor circuit protectors – motor branch circuits
- Ground-fault breakers – personnel protection
Choosing a Breaker
Select current rating, voltage, poles, trip curve and interrupting rating. Confirm UL listing for your application, whether branch circuit (UL 489) or supplementary (UL 1077).
Centro carries circuit breakers and accessories.
Related categories: Circuit Protection | Fuses | Breaker Conversion Kits | Fuse Blocks and Holders | Disconnect Accessories
Contactors are electrically operated switches for motors, heaters, lighting and power loads. Paired with overload relays, they form motor starters.
Contactor Types
- IEC contactors – compact, application-rated
- NEMA contactors – robust and size-rated
- Definite purpose contactors – HVAC equipment
- Reversing assemblies – forward/reverse control
- Accessories – auxiliary contacts, suppressors and timers
Choosing a Contactor
Size to motor horsepower or load current, utilization category and coil voltage. For frequent switching, check electrical life. Use suppressors on PLC-driven coils.
Centro carries contactors and accessories for motor control.
Related categories: Motor Control | Control Relays | Manual Starters | Soft Starters | DC Drives
Push buttons are the most direct way an operator talks to a machine. Start, stop, jog, reset and emergency stop functions all depend on a button that feels right, is clearly marked and holds up to thousands of presses in tough conditions.
Push Button Options
- Momentary and maintained buttons for start/stop and on/off functions
- Illuminated push buttons with LED indication of machine status
- Emergency stop mushroom heads with twist or key release
- Selector switches and key switches for mode selection and lockout
- Push button stations and enclosures for remote and pendant control
- Contact blocks, legend plates and guards to complete the assembly
Choosing the Right Button
Start with the mounting size (22 mm and 30 mm are the most common), then choose the operator type, color and contact arrangement. For outdoor, washdown or oily environments, check the NEMA or IP rating. Use red only for stop and emergency functions, and green or black for start, to follow common safety practice.
Centro carries push buttons and accessories from leading control brands, so you can match existing panels or build new ones with parts that work together.
Related categories: Electrical Accessories | Sounders | Drag Chain Guide Systems | Transformer Accessories | Control Lighting
Power supply transformers step line voltage down to the levels needed by control circuits, power supplies and equipment. They also provide isolation for safer, quieter operation.
Transformer Options
- Control transformers – machine control circuits
- Step-down transformers – equipment power
- Isolation transformers – noise reduction
- DIN rail transformers – compact panel mounting
- Fused transformers – built-in protection
Choosing a Transformer
Select primary and secondary voltages and VA rating with margin for inrush. Confirm mounting style and overcurrent protection.
Centro supplies transformers for control panels and power supplies.
Related categories: Standard Power Supplies | Standard Power Supplies | Power Supplies | Control Transformers | Transformer Accessories
Contactor accessories extend contactor functions without replacing the contactor. Auxiliary contacts, suppressors, timers and interlocks fit directly to the contactor.
Accessories Available
- Auxiliary contact blocks – status and interlocking
- Surge suppressors – protect control outputs
- Timer modules – delayed switching
- Mechanical interlocks – reversing and transfer
- Overload relays – direct-mount protection
Choosing Accessories
Accessories are series-specific, so start with your contactor model. Use suppressors on coils driven by PLC outputs.
Centro supplies contactor accessories for leading brands.
Related categories: Motor Control | EMC Filters | Drive Communication | Braking Resistors and Regenerative Converters | Motor Control Parts
Disconnect switches isolate equipment from power so maintenance can be done safely. They're required by code for motors and machines, and support lockout/tagout procedures.
Disconnect Types
- Fusible disconnects – isolation with fuse protection
- Non-fusible disconnects – isolation only
- Rotary disconnects – panel-mount with door handles
- Enclosed safety switches – NEMA 1, 3R, 4X and 12
- Accessories – handles, shafts and auxiliary contacts
Choosing a Disconnect
Select by voltage, amperage, horsepower rating, poles and enclosure. Confirm short-circuit ratings and code requirements.
Centro supplies disconnect switches and accessories.
Related categories: Circuit Protection | Circuit Monitoring | Fuse Blocks and Holders | Circuit Protection Accessories | Fuses
Disconnect accessories complete a disconnect switch installation, providing safe handle operation through panel doors, lockout capability and status feedback.
Accessories Available
- Door-mounted handles – operate the switch without opening the enclosure
- Extension shafts – connect the handle to the switch body
- Auxiliary contacts – signal switch position to controls
- Padlock attachments – lockout/tagout compliance
- Fuse kits and terminal shrouds – fusible conversions and finger safety
Ordering Tips
Start with the disconnect switch model and amperage. Measure the enclosure depth to choose the right shaft length. Handle color matters: red and yellow handles are typically used for emergency or main disconnects.
Centro can confirm the right handles, shafts and contacts for your disconnect switches.
Related categories: Circuit Protection | Breaker Conversion Kits | Circuit Breaker Accessories | Circuit Breakers | Fuses
Control relays are electrical devices that control and switch electrical circuits in industrial automation and control systems. These relays act as electromechanical switches, allowing a low-power control signal to control a higher-power circuit. Control relays are commonly used to control motors, solenoids, lights, and other electrical loads. They provide reliable and efficient control by isolating the control circuit from the higher-voltage or higher-current circuits. Control relays are available in various configurations, such as electromechanical and solid-state relays, offering different features and capabilities. They play a crucial role in automating processes, ensuring proper sequencing, and enhancing the safety and reliability of control systems.
Related categories: Motor Control | Soft Starters | Contactors | Motor Control Parts | Manual Starters
Lighting contactors switch large lighting loads in buildings, parking lots, warehouses and stadiums. They're rated for the inrush current of lighting ballasts and LED drivers.
Lighting Contactor Types
- Electrically held contactors – simple control
- Mechanically held contactors – quiet and energy-efficient
- Multi-pole designs – switch many circuits
- Enclosed contactors – standalone mounting
Choosing a Contactor
Select by load current, poles, coil voltage and holding method. Mechanically held contactors save energy and stay put through power interruptions.
Centro supplies lighting contactors for commercial and industrial facilities.
Related categories: Electrical Control | Indicator Lights | Control Accessories | General Purpose Relays | Control Contactors
Circuit protection accessories complete breaker, fuse and disconnect installations, adding safety, signaling and flexibility.
Accessories Available
- Auxiliary and alarm contacts – status signals
- Shunt trips and undervoltage releases – remote tripping
- Lockout devices – safe maintenance
- Busbars and terminals – efficient wiring
- Covers and shrouds – finger safety
Choosing Accessories
Accessories are series-specific, so confirm the device part number before ordering.
Centro supplies circuit protection accessories.
Related categories: Circuit Protection | Circuit Breaker Enclosures | Circuit Monitoring | Molded Case Circuit Breakers | Disconnect Switches
Control transformers supply stable, isolated low voltage, usually 120V or 24V, to control circuits in machines and panels. They handle the inrush current of contactors, relays and solenoids.
Features
- Multiple primary taps – flexible input voltages
- High inrush capacity – reliable coil switching
- Fuse block options – built-in protection
- Finger-safe terminals – safer wiring
Choosing a Transformer
Size VA by adding sealed and inrush loads of connected devices, then confirm primary and secondary voltages. Follow NEC overcurrent requirements.
Centro supplies control transformers for industrial panels.
Related categories: Standard Power Supplies | Power Supplies | Transformer Accessories | Transformers | Standard Power Supplies
Indicator lights show machine status, alarms and power at a glance. Clear indication helps operators respond quickly and safely.
Indicator Light Options
- LED pilot lights – long life and low power
- 22 mm and 30 mm sizes – match panel layouts
- Multiple colors – red, green, amber, blue and white
- Push-to-test lights – verify lamp function
- Tower lights – stacked machine status
Choosing Lights
Match voltage, size and color to your panel. Follow color conventions so status is easy to read.
Centro supplies indicator lights for control panels.
Related categories: Electrical Control | General Purpose Relays | Lighting Contactors | Timing Relays | Control Accessories
Motor starters are for safely starting and stopping electric motors, particularly in industrial and commercial industry. They regulate the power sent to the motor, ensuring it ramps up to full speed without drawing too much current. This prevents potential damage to the motor and other electrical components. Motor starters come with built-in overload protection, adding an extra layer of safety by automatically shutting down the motor if it overheats or experiences a fault. Easy to install and operate, these devices are crucial for maintaining the longevity and reliability of your motor-driven equipment. Explore our range of motor starters below or contact us to speak with a product expert.
Related categories: Motor Control | Phase Converters | Universal Motor Controller | Braking Resistors and Regenerative Converters | EMC Filters
Control accessories complete push buttons, selector switches and pilot devices on control panels. Contact blocks, legend plates, guards and enclosures let you configure operator controls for each machine.
Accessories Available
- Contact blocks – normally open and normally closed
- Legend plates – clear function labeling
- Protective guards and boots – prevent accidental operation
- Push button enclosures – remote and pendant stations
- LED lamp modules – illuminated devices
Choosing Accessories
Accessories are series-specific, so match them to your operator brand and size (22 mm or 30 mm). Use standardized colors and legends for safety.
Centro supplies control accessories for operator devices.
Related categories: Electrical Control | Lighting Contactors | Control Contactors | Indicator Lights | Miniature Contactor Accessories
Miniature contactors switch small motors, heaters and control loads in compact panels. They save space while giving reliable switching.
Features
- Compact footprint – save panel space
- AC and DC coils – direct PLC control options
- Integrated auxiliary contacts – status signals
- Accessories – suppressors and overload relays
Choosing a Contactor
Size by load current and utilization category, and select coil voltage. Use suppressors with PLC outputs.
Centro supplies miniature contactors and accessories.
Related categories: Electrical Control | Timing Relays | General Purpose Relays | Indicator Lights | Lighting Contactors
Mechanical switches control circuits through physical actuation, such as limit switches, toggle switches, foot switches and safety switches. They're simple, reliable and used across machinery and controls.
Switch Types
- Limit switches – detect machine position
- Foot switches – hands-free operation
- Toggle and rocker switches – manual control
- Safety interlock switches – guard doors
- Micro switches – compact sensing
Choosing a Switch
Select actuator type, contact rating and environmental protection. Safety switches must meet relevant standards.
Centro supplies mechanical switches for machines and panels.
Related categories: Electrical Accessories | Electrical Accessories | Specialty Conduit Fittings and Hardware | Specialty Conduit | Label Sleeves and Holders
An overload relay protects a motor from burning out when it draws too much current for too long because of a jammed load, a lost phase or a failing bearing. Paired with a contactor, it forms a motor starter that trips before heat damages the windings.
Overload Relay Types
- Thermal (bimetallic) overload relays – simple, proven protection for standard motors
- Electronic overload relays – wide adjustment ranges, phase-loss detection and tighter accuracy
- Solid-state relays with communication – motor diagnostics over industrial networks
- Class 10, 20 and 30 trip curves – matched to standard and high-inertia starting loads
- Accessories – reset buttons, mounting adapters and auxiliary contacts
Sizing an Overload
Set the overload to the motor's full-load amps from its nameplate and select a trip class that allows normal starting time. Make sure the relay is compatible with your contactor brand and frame size. Electronic relays are a good upgrade when motors run in hot panels or need ground-fault and phase-imbalance protection.
Centro carries overload relays that pair with popular IEC and NEMA contactors, and our team can help you select the right overload for your motor and contactor.
Related categories: Motor Control | Line Reactors and Output Filters | Variable Frequency Drives | Configured Drives / Control Systems | DC Drives
Soft starters gradually ramp up motor voltage to reduce inrush current and mechanical stress. They cut belt slip, water hammer and wear on gearboxes and couplings.
Soft Starter Features
- Adjustable ramp times – smooth acceleration
- Soft stop – reduce water hammer in pumps
- Built-in bypass – lower heat during running
- Motor protection – overload and phase loss
- Communication options – network integration
Soft Starter vs VFD
Soft starters are a cost-effective choice when you need gentle starts but not speed control. If you need variable speed or energy savings, consider a VFD.
Centro supplies soft starters for pumps, fans, conveyors and compressors.
Related categories: Motor Control | Motor Control Parts | Control Relays | Drive Communication | Contactors
Manual motor starters start, stop and protect small motors without a contactor. They're compact and simple, and they combine switching with overload protection.
Manual Starter Types
- Motor protection switches – adjustable overload and short-circuit protection
- Toggle and push button starters – fractional horsepower motors
- Enclosed manual starters – standalone mounting
- Accessories – auxiliary contacts and lockable handles
Choosing a Starter
Set the overload range to the motor's full-load amps and check the short-circuit rating. Use enclosed versions for machine-side mounting.
Centro supplies manual motor starters for small motor control.
Related categories: Motor Control | Contactors | DC Drives | Control Relays | Configured Drives / Control Systems
Control contactors switch power to motors, heaters, lighting and other loads on command from a control circuit. They're a core part of industrial control panels, letting low-voltage signals from PLCs and pushbuttons safely switch high-current loads.
Contactor Types
- IEC contactors – compact, application-rated designs
- NEMA contactors – size-rated for robust industrial use
- Definite purpose contactors – HVAC and refrigeration equipment
- Reversing contactors – forward/reverse motor control
- Accessories – auxiliary contacts, suppressors and overloads
Choosing a Contactor
Size to the load's current and utilization category, such as AC-3 for motors, along with voltage, coil voltage and the number of poles. For frequent switching, check the electrical life rating. Pair with an overload relay to build a motor starter.
Centro carries control contactors and accessories from leading electrical brands.
Related categories: Electrical Control | Control Accessories | Miniature Contactor Accessories | Lighting Contactors | Indicator Lights
Motor control parts keep starters, drives and control panels running. Replacement coils, contacts, overload heaters and accessories restore equipment quickly and cut downtime.
Parts Available
- Replacement coils – contactor and starter coils
- Contact kits – restore worn contacts
- Overload heaters and relays – motor protection
- Auxiliary contacts – add control functions
- Drive fans and parts – drive maintenance
Ordering Parts
Have the manufacturer, model and series of your equipment ready. Some older equipment may need cross-reference or retrofit options.
Centro supplies motor control parts and cross-references.
Related categories: Motor Control | Drive Communication | Soft Starters | Contactor Accessories | Control Relays
Circuit monitoring devices measure current, voltage, power and energy use in electrical systems. They help you manage loads, find problems and cut energy costs.
Monitoring Products
- Power meters – energy and power quality
- Current sensors and transducers – load monitoring
- Monitoring relays – phase loss and voltage faults
- Ground fault monitors – insulation monitoring
Choosing a Solution
Define what to monitor, accuracy needed and communication options. Networked meters feed energy management systems.
Centro supplies circuit monitoring products.
Related categories: Circuit Protection | Circuit Protection Accessories | Disconnect Switches | Circuit Breaker Enclosures | Fuse Blocks and Holders
Standard electrical enclosures are essential components used to house and protect electrical equipment, controls, and wiring. These enclosures provide a safe and secure environment, shielding sensitive electrical components from environmental factors, such as dust, moisture, and physical damage. Standard electrical enclosures are typically made of durable materials, such as steel or aluminum, and feature a sturdy construction with proper sealing to ensure reliable protection. They come in various sizes, configurations, and mounting options to accommodate different equipment and installation requirements. Standard electrical enclosures are crucial in maintaining the integrity and longevity of electrical systems, ensuring safety and efficient operation in industrial, commercial, and residential applications.
Related categories: Enclosures | Custom Enclosures
Circuit breaker accessories add functions to breakers, including remote tripping, status feedback, interlocking and lockout, without replacing the breaker itself.
Accessories Available
- Shunt trips – trip a breaker remotely from an emergency stop or alarm
- Undervoltage releases – trip when supply voltage drops
- Auxiliary and alarm contacts – report breaker status
- Handle operators and locks – door-mounted and lockout/tagout devices
- Terminal lugs and covers – secure, finger-safe connections
Selecting Accessories
Accessories are specific to the breaker frame and series, so confirm the breaker part number first. Check whether the accessory installs in the field or must be factory installed, and verify the coil voltage for shunt trips and undervoltage releases.
Centro can identify compatible accessories for the breakers already in your panels.
Related categories: Circuit Protection | Disconnect Accessories | Breaker Conversion Kits | Circuit Breakers | Fuses
Fuse blocks and holders mount fuses securely and safely in panels and equipment. Finger-safe designs and indicators make maintenance safer and quicker.
Fuse Block Types
- DIN rail fuse holders – compact control panel mounting
- Panel-mount fuse blocks – power distribution
- Finger-safe holders – reduce shock hazards
- Indicating holders – show blown fuses
- Inline holders – wire-mounted protection
Choosing a Holder
Match fuse class, size, amperage, voltage and number of poles. Check UL ratings and wire range. Indicating holders cut troubleshooting time.
Centro supplies fuse blocks and holders for control panels.
Related categories: Circuit Protection | Disconnect Switches | Fuses | Circuit Monitoring | Circuit Breakers
Electrical transformer accessories make transformer installations safer, neater and easier to service. Mounting brackets, weather shields, terminal kits and fuse blocks adapt transformers to your panel or site conditions.
Accessories Available
- Wall and floor mounting brackets – secure installation
- Weather shields and drip hoods – outdoor protection
- Lug and terminal kits – correct conductor termination
- Fuse blocks and fuses – overcurrent protection
- Vibration isolation pads – reduce transformer hum and noise
Choosing Accessories
Check compatibility with the transformer's frame size and manufacturer. Outdoor installations need NEMA 3R weather shields, and noise-sensitive spaces benefit from isolation pads. Follow NEC requirements for primary and secondary protection.
Centro can match transformer accessories to your transformer model and installation needs.
Related categories: Electrical Accessories | Control Lighting | Drag Chain Guide Systems | Thermal Management | Sounders
Circuit breaker enclosures house breakers for standalone protection of equipment and circuits. They protect breakers from the environment and people from live parts.
Enclosure Options
- NEMA 1 – indoor general purpose
- NEMA 3R – outdoor rainproof
- NEMA 4/4X – washdown and corrosive
- NEMA 12 – dust and drip resistant
- Lockable covers – lockout/tagout
Choosing an Enclosure
Match the enclosure to breaker frame size and environment. Confirm the enclosure is listed for your breaker.
Centro supplies circuit breaker enclosures.
Related categories: Circuit Protection | Molded Case Circuit Breakers | Circuit Protection Accessories | Circuit Monitoring | Disconnect Switches
Universal motor controllers combine starting, protection and control in one adaptable device, simplifying motor control for many applications.
Features
- Integrated protection – overload, phase loss and jam
- Flexible configuration – direct, reversing and star-delta
- Network communication – diagnostics and control
- Compact design – save panel space
Choosing a Controller
Match current range, voltage and control functions. Networked models reduce wiring and provide motor data.
Centro supplies universal motor controllers.
Related categories: Motor Control | Phase Converters | Braking Resistors and Regenerative Converters | Motor Starters | EMC Filters
Standard power supplies provide regulated DC power for controls, sensors, PLCs and electronics. Reliable power prevents nuisance faults and downtime.
Power Supply Options
- DIN rail power supplies – compact panel mounting
- Enclosed power supplies – OEM equipment
- Transformers – AC control power
- Accessories – fuses and mounting
Choosing a Power Supply
Size for total load with margin, and consider input voltage, temperature and redundancy.
Centro supplies standard power supplies.
Related categories: Standard Power Supplies | Transformers | Power Supplies | Control Transformers | Transformer Accessories
Electrical accessories cover the many small components that finish control panels and electrical installations, including terminal blocks, wire duct, DIN rail, grommets and mounting hardware.
Accessories Available
- Terminal blocks and jumpers – organized wiring
- Wire duct and DIN rail – panel layout
- Cable glands and grommets – secure cable entry
- Ferrules and lugs – reliable terminations
- Panel hardware – mounting and grounding
Building Better Panels
Quality accessories make panels easier to build, inspect and maintain. Standardize on product families for consistency.
Centro supplies electrical accessories for panel builders.
Related categories: Electrical Accessories | Mechanical Switches | Specialty Conduit Fittings and Hardware | Specialty Conduit | Label Sleeves and Holders
Electrical controls switch and signal the operation of motors, lighting and machines. Contactors, relays and indicator lights form the backbone of control panels.
Electrical Control Products
- Control and lighting contactors – switch loads
- General purpose and timing relays – logic and delays
- Miniature contactors and accessories – compact control
- Indicator lights – status and alarm display
- Control accessories – contact blocks and legend plates
Choosing Controls
Match voltage, load ratings and coil voltage. Standardizing on one product family simplifies spares and design.
Centro supplies electrical controls for panel builders and maintenance teams.
Shop by type: Miniature Contactor Accessories | Control Contactors | Control Accessories | Lighting Contactors | Indicator Lights | General Purpose Relays | Timing Relays | Miniature Contactors
Related categories: Pneumatic and Electronic Controls | Specialty and Industry Specific Products | Uninterrupted Power Supplies | Valve Systems | Standard Power Supplies
Miniature contactors save panel space in control circuits, small motor starters and HVAC equipment. Accessories add functions to these compact contactors without moving up to a larger frame, making it easy to add signaling, interlocking or surge protection where you need it.
Common Accessories
- Auxiliary contact blocks – front or side-mount contacts for status and interlocking
- Surge suppressors – RC, varistor and diode modules that protect control electronics
- Mechanical interlocks – for reversing and transfer applications
- Overload relays – sized to mount directly to miniature contactors
- Marking tags and covers – for clear identification and finger-safe wiring
Choosing Accessories
Accessories are usually brand- and series-specific, so start with the contactor model number. Check how many auxiliary contacts the contactor will accept and whether they mount on the front or side. For coils switched by PLC outputs, adding a suppressor extends output life and reduces electrical noise.
Centro can match accessories to the miniature contactors already in your panels. Send us the part number and we'll confirm compatibility.
Related categories: Electrical Control | Control Contactors | Control Accessories | Lighting Contactors | Indicator Lights
Fuses provide fast, dependable overcurrent protection for circuits, motors, drives and electronics. Their high interrupting ratings make them ideal where fault currents are high.
Fuse Types
- Class CC, J and RK fuses – branch circuit protection
- Time-delay fuses – motor inrush tolerance
- Fast-acting fuses – electronics protection
- Semiconductor fuses – drives and rectifiers
- Midget and glass fuses – control circuits
Choosing a Fuse
Match class, amperage, voltage and interrupting rating to the circuit and fuse holder. Use time-delay fuses for motors and fast-acting fuses for semiconductors.
Centro carries fuses for industrial and commercial electrical systems.
Related categories: Circuit Protection | Fuse Blocks and Holders | Circuit Breakers | Disconnect Switches | Breaker Conversion Kits
Industrial networking connects PLCs, drives, HMIs and sensors so data moves reliably across the plant. Robust networks support automation, monitoring and remote access.
Networking Products
- Unmanaged and managed Ethernet switches – connect devices
- Industrial routers and firewalls – secure remote access
- Protocol gateways – connect different networks
- Wireless access points – mobile and hard-to-wire equipment
- Industrial Ethernet cables and connectors – reliable links
Planning a Network
Consider the number of devices, protocols, segmentation and cybersecurity. Managed switches add diagnostics and traffic control. Use industrial-rated hardware for temperature and vibration.
Centro supplies industrial networking products.
Related categories: Electrical Accessories | Drag Chains | Connectors | Cable Entry | Thermal Management
Timing relays add time delays to control circuits, such as delaying a start, keeping a fan running after shutdown or cycling equipment on and off.
Timing Relay Types
- On-delay relays – delay after energizing
- Off-delay relays – delay after de-energizing
- Repeat cycle relays – on/off cycling
- Multi-function relays – select modes
- DIN rail and plug-in styles – suit panels
Choosing a Relay
Select timing range, function, voltage and contacts. Multi-function relays reduce spare parts inventory.
Centro supplies timing relays for control circuits.
Related categories: Electrical Control | Miniature Contactors | General Purpose Relays | Indicator Lights | Lighting Contactors
General purpose relays are designed to control circuits by opening or closing contacts based on electrical signals. Relays are widely used across various industries, from automotive and telecommunications to industrial automation and household appliances. They facilitate the switching of electrical loads, providing reliable operation and safety features such as overload protection and isolation. With configurations for different voltage ratings, contact types, and mounting options, general purpose relays accommodate diverse application requirements. Their robust design promises longevity and performance consistency in controlling motors, lights, heaters, and other electrical devices. Tell us your coil voltage, contact arrangement and socket style, and we'll help you find the right general purpose relay for your panel.
Related categories: Electrical Control | Timing Relays | Indicator Lights | Miniature Contactors | Lighting Contactors
$1,123.62
Subject to factory lead times
$0.72$0.94
Subject to factory lead times
$41.10$43.09
Subject to factory lead times
$9.64$12.63
Subject to factory lead times
$12.72$16.65
Subject to factory lead times
$7.96$10.43
Subject to factory lead times
$11.31$14.81
Subject to factory lead times
$7.96$10.43
Subject to factory lead times
$11.31$14.81
Subject to factory lead times
$9.64$12.63
Subject to factory lead times
$12.72$16.65
Subject to factory lead times
$12.16$15.93
Subject to factory lead times
$15.35$20.12
Subject to factory lead times
$21.83$28.60
Subject to factory lead times
$27.64$36.21
Subject to factory lead times
$12.16$15.93
Subject to factory lead times
$14.10$18.47
Subject to factory lead times
$12.72$16.65
Subject to factory lead times
$14.81$19.40
Subject to factory lead times
$12.72$16.65
Subject to factory lead times
$14.81$19.40
Subject to factory lead times
$13.12$17.19
Subject to factory lead times
$15.24$19.96
Subject to factory lead times
$13.12$17.19
Subject to factory lead times
$1,123.62
Subject to factory lead times
$0.72$0.94
Subject to factory lead times
$41.10$43.09
Subject to factory lead times
$9.64$12.63
Subject to factory lead times
$12.72$16.65
Subject to factory lead times
$7.96$10.43
Subject to factory lead times
$11.31$14.81
Subject to factory lead times
$7.96$10.43
Subject to factory lead times
$11.31$14.81
Subject to factory lead times
$9.64$12.63
Subject to factory lead times
$12.72$16.65
Subject to factory lead times
$12.16$15.93
Subject to factory lead times
$15.35$20.12
Subject to factory lead times
$21.83$28.60
Subject to factory lead times
$27.64$36.21
Subject to factory lead times
$12.16$15.93
Subject to factory lead times
$14.10$18.47
Subject to factory lead times
$12.72$16.65
Subject to factory lead times
$14.81$19.40
Subject to factory lead times
$12.72$16.65
Subject to factory lead times
$14.81$19.40
Subject to factory lead times
$13.12$17.19
Subject to factory lead times
$15.24$19.96
Subject to factory lead times
$13.12$17.19
Subject to factory lead times
- Selecting the right pneumatic cylinder starts with defining the four core parameters of your application. Define four core parameters: bore size (force output = pressure × piston area, plus a 25–50% safety factor), stroke length (match to required travel, avoid excess), mounting style (fixed, flange, or pivot to suit your mechanical arrangement), and environment (standard, washdown, or food-grade seals). Speed is controlled by external flow valves, not cylinder selection. For precise positioning, consider a guided or rodless cylinder with position sensing rather than a standard unit.
- A soft starter ramps voltage at startup to limit inrush current and reduce mechanical shock, then steps aside once the motor reaches full speed. Use one when smooth starting is your only requirement. A VFD controls motor speed continuously throughout operation, making it the right choice whenever the process needs variable speed — conveyors, pumps, fans — and it delivers significant energy savings in centrifugal applications. If you only need a gentle start, use a soft starter. If you need speed control at any point during operation, invest in a VFD.
- PLCs are purpose-built for industrial environments — they tolerate heat, vibration, and electrical noise while executing control logic in deterministic millisecond scan cycles. They replace hardwired relay logic with reprogrammable software, making process changes fast and inexpensive. Built-in diagnostics centralize fault visibility and cut troubleshooting time. Modern PLCs integrate with HMIs, SCADA, and enterprise networks via standard protocols, enabling real-time data collection. Modular architecture means the system scales as the application grows.
- Start with the NEMA or IP rating: NEMA 1 for basic indoor use, NEMA 4/4X for washdown and outdoor exposure (4X adds corrosion resistance), NEMA 7/9 for hazardous classified locations. Size the enclosure with 20–30% spare interior space for future additions and adequate heat dissipation. Choose material based on environment — painted steel for standard indoor use, stainless for washdown or chemical exposure, fiberglass for highly corrosive areas. Verify any required certifications (UL, CSA, ATEX) before specifying.
- Solenoid valves are electrically actuated and can be triggered instantly by a PLC or control system, making them essential for automated, repeatable, or high-cycle applications. Manual directional control valves require a person to physically shift the valve and are appropriate for infrequent operations, manual overrides, or applications with no control system. In practice, most automated systems use solenoid valves for normal operation with a manual override built in for setup, maintenance, and emergency use. If the valve must respond to a signal, cycle repeatedly, or operate unattended, solenoid is the correct choice.





