Electronic Controls and PLCs | McMaster-Carr

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System of Measurement

Voltage

90V AC to 240V AC

94V AC to 135V AC

Switching Voltage

0.2V AC to 400V AC

6V AC to 400V AC

12V AC to 140V AC

12V AC to 240V AC

12V AC to 250V AC

12V AC to 275V AC

24V AC to 240V AC

24V AC to 264V AC

24V AC to 265V AC

24V AC to 280V AC

24V AC to 420V AC

42V AC to 242V AC

Input Voltage

20V AC to 30V AC

20V AC to 240V AC

24V AC to 240V AC

85V AC to 250V AC

85V AC to 260V AC

85V AC to 264V AC

90V AC to 240V AC

90V AC to 250V AC

90V AC to 264V AC

90V AC to 265V AC

95V AC to 250V AC

Actuator Style

Cross Roller Plunger

Dual Switch Roller Lever

Mounting Location

Electrical Receptacle

Switching Current

Wire Connection

Standard Banana

Environment

Food and Beverage

High Temperature

High-Pressure Washdown

High-Temperature Washdown

Low Temperature

Electrical Connection

1" Circular Connector

8-Pin Circular DIN

DIN Valve Connection

DT Deutsch Style

Flat-Pin Mini Thermocouple Connector

Number of Terminals

Number of Circuits Controlled

Current

Number of Poles

Switch Action

RoHS

Compliant with Exemptions

Switch Designation

REACH

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Export Control Classification Number (ECCN)

DFARS Specialty Metals

Material

Stainless Steel

Certification

ABS Type Approved

AS-International Association Certified

C-TUV Rheinland Certified

C-UL Classified

C-UL Recognized Component

California Fire Marshal Approved

CSA-US Certified

DNV-GL Type Approved

EHEDG Certified

Electrical Phase

Enclosure Rating

Color

How can we improve?

8,822 Products

Motor Starters

Low-Profile Motor Starters

A shallower depth than most other starters fits in narrow spaces

Enclosed Motor Starters

Enclosed Motor Starters

The NEMA 4X rated enclosure protects from corrosion and washdowns

Motor Starters

Turn motors on and off and protect them from current overloads

Reversing Motor Starters

Reversing Motor Starters

Use with motors that run forward and backward, such as for conveyor belts

Enclosed Reversing Motor Starters

Enclosed Reversing Motor Starters

Use with motors that run forward and backward and need NEMA 4X rated protection

Build-Your-Own Manual Motor Starters

Build-Your-Own Manual Motor Starters

Combine a switch and a thermal overload element for a custom design

Heavy Duty Motor Starters

Heavy Duty Motor Starters

Sealed coils protect against moisture, heat, dirt, and mechanical stress

Enclosed Heavy Duty Motor Starters

Enclosed Heavy Duty Motor Starters

Sealed coils enclosed in steel are protected from moisture, heat, and dirt

Compact Enclosed Motor Starters

Compact Enclosed Motor Starters

NEMA 4X rated, plus shorter and narrower than most other starters to fit in tight spaces

Manual Motor Starters

Manual Motor Starters

Operate by hand and are more compact than electrically actuated motor starters

Energy-Saving Motor Starters

Energy-Saving Motor Starters

Save electricity and extend motor life by reducing the motor's starting current

Enclosed Heavy Duty Build-Your-Own Manual Motor Starters

Enclosed Heavy Duty Build-Your-Own Manual Motor Starters

Combine a switch and a thermal overload element inside a steel enclosure

Heavy Duty Build-Your-Own Manual Motor Starters

Heavy Duty Build-Your-Own Manual Motor Starters

Combine a switch and a thermal overload element for use with high-current-rated motors

Other Products

Push-Button Switches

Push-Button Switches

Our most common switch type actuates circuits with the push of a button

Power Receptacles

Power Receptacles

Install in a wall or panel to transmit power to plugs or sockets

Solenoid On-Off Valves

Solenoid On-Off Valves

A solenoid withstands rapid cycling for applications with frequent opening and closing

Circuit Breakers

Circuit Breakers

Reusable way to interrupt circuits when they overload or short

Directional Control Valves

Directional Control Valves

Manage the flow of fluids to move equipment in air- and hydraulic-powered systems

Relays

Electrically open and close circuits to control power to lights, motors, and other equipment

Metric Circular Connectors

Metric Circular Connectors

Plugs, sockets, receptacles, and adapters for equipment with metric connections

Power Supplies

Convert your facility's AC voltage to power equipment that runs on DC voltage

Toggle Switches

Toggle Switches

Flip the toggle from one position to the other, turning circuits on and off

Lever Switches

Grip and twist the lever to turn circuits on and off, preventing accidental actuation

Disconnect Switches

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

Snap-Acting Switches

Snap-Acting Switches

Open and close circuits quickly to minimize arcing and sticking; often used as door-open indicators

Stepper Motors

The motor shaft turns in small, equal increments for precise positioning

Timer Relays

Turn machinery on or off after receiving an electrical signal that starts the timer

Emergency Stop Switches

Emergency Stop Switches

Cut power to equipment during emergencies

Rocker Switches

Rocker Switches

Press the wide, flat surface to easily turn circuits on and off

Torque Limiters

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

Limit Switches

Turn equipment on or off when objects touch the actuator; often used for conveyors and bin filling

Light Switches

Manually turn lights on and off

D-Sub Connectors

D-Sub Connectors

Plugs, sockets, receptacles, and adapters for connecting computers, monitors, and printers

Timer Switches

Automatically turn electrical equipment on or off after a set interval

Electric Actuators

Electric Actuators

Push and pull loads with more precise positioning than air and hydraulic cylinders

Pendant Switches

Pendant Switches

Control machinery, such as cranes, hoists, and trolleys, from a safe distance

Indicating Knobs

Indicating Knobs

Control devices and view settings at a glance

Diodes

Route current in one direction and block it in the other to protect sensitive electronics

Magnetic Switches

Magnetic Switches

Actuate when a magnet comes within sensing distance; often used to detect when doors or windows open

Potentiometers

Control speed, volume, and light intensity by varying electrical flow; also known as rheostats

RJ45 Connectors

RJ45 Connectors

Plugs, sockets, and receptacles to make Ethernet connections

Electric Slides

Electric Slides

Move parts with precision in electronics, robotics, and other automated processes

Foot Switches

Step on the pedal to actuate circuits while keeping your hands free for other tasks

Light Switch Sensors

Light Switch Sensors

Automatically turn lights on and off when you enter and exit rooms

PLCs

Program complex automation jobs by combining the functionality of a relay, timer relay, and switch

Brackets

Connect surfaces in an assembly

Mil. Spec. Receptacles

Mil. Spec. Receptacles

Install in walls and panels and pair with Mil. Spec. plugs

Servomotors

Create rotary motion with accurate positioning and fine control over speed and torque

Electric Gearmotors

Electric Gearmotors

A motor and speed reducer in one to slow speed and increase torque in AC- or DC- power applications

LED Drivers

Deliver the electrical current your LEDs need

Clutches

Start and stop the transmission of power to machinery

Mini Receptacles

Mini Receptacles

Install in walls and panels and pair with plugs to send power and signal

Bumper Switches

Bumper Switches

Signal when overhead doors close or items reach the end of conveyors

Motor Switches

Turn motors, lighting, and electric heat circuits on and off

Key Switches

Turn a key to actuate circuits, preventing accidental start and limiting access

Light Curtains

Immediately cut power to machinery when anything blocks the light beam

Light Sockets

Install or replace sockets in fixtures for standard household, tubular, compact, or miniature bulbs

Switch Contact Blocks

Switch Contact Blocks

Mount to switches to control electrical circuits as you move the switch

Safety Switches

Safety Switches

Protect people by cutting power to machines when access doors open; also known as interlock switches

Photoelectric Sensor Reflectors

Photoelectric Sensor Reflectors

Pair with reflector photoelectric sensors to bounce light back at them

Switch Mats

Step on a mat to actuate circuits, often to control doors, lights, and alarms

Electric Motors

Electric Motors

Keep machinery and equipment moving with AC or DC power

Motor Speed Controls

Motor Speed Controls

Manage the speed of AC and DC motors

Current Conditioners

Current Conditioners

Lower current flows to levels that work with panel monitors and other electrical measuring equipment

Batteries

Household, button/coin cell, large-cell, and cordless tool batteries

Rectifiers

Convert AC voltage to a constant DC voltage on a circuit board

Light Dimmers

Adjust the brightness of lights, even in large workspaces

Light Retrofit Kits

Light Retrofit Kits

Upgrade to energy-efficient LED lights without completely replacing old fixtures

Audio Connectors

Audio Connectors

Plugs, sockets, receptacles, and adapters to make audio connections

Finger-Touch Switches

Finger-Touch Switches

Lightly touch with your finger to turn circuits on and off

Level Sensor Switches

Level Sensor Switches

Activate equipment by detecting the liquid level in a tank

Relay Sockets

Quickly mount relays to DIN rail or flat surfaces

IO-Link Connectors

IO-Link Connectors

Remotely view measurements, adjust settings, and identify errors in sensors and actuators

Doorbell Switches

Doorbell Switches

Activate doorbells or buzzers with the push of a button

Stepper Gearmotors

Stepper Gearmotors

Stepper motor and gearbox in one for high torque in areas large motors won’t fit

Transistors

Boost weak electrical signals and rapidly control data transmission

Varistors

Protect sensors, programmable logic controllers, and other small components from electrical surges

Smoke Detectors

Smoke Detectors

Warn people when there's smoke in your facility

Solenoid Valve Connectors

Solenoid Valve Connectors

Sockets and receptacles to connect solenoid components, such as valves and motors

Ecomate Connectors

Ecomate Connectors

Connect machine tools, robots, and other vibrating equipment

Computers

Sturdy and reliable for harsh industrial jobsites, from frigid freezers to sweltering foundries

Potentiometer Panel Seals

Potentiometer Panel Seals

Keep moisture and dust out of potentiometers

Ribbon Switches

Ribbon Switches

Place across driveways or walkways to actuate when foot and vehicle traffic pass over

Joystick Switches

Joystick Switches

Move the joystick to steer and position cranes, robot arms, and other machinery

Rotary Switches

Rotary Switches

Control multiple devices with a single switch

Enabling Switches

Enabling Switches

Equipment only runs while you press the switch; also known as deadman switches

T-Slotted Framing Switches

T-Slotted Framing Switches

Attach to your rail to actuate components or cut power

Air-Actuated Switches

Air-Actuated Switches

Press with your hand or foot to turn circuits on and off with air pressure

Computer Monitors

Computer Monitors

Display information in tough conditions such as on factory floors and outdoor jobsites

Light Switch Sensor Controllers

Light Switch Sensor Controllers

Turn lights on and off or dim them in unison from a secure Bluetooth network

Power Cords

Connect equipment and devices to a power source

Light Switch/Receptacles

Light Switch/Receptacles

Combine a switch and receptacle into a single outlet box for a small footprint

Motor Starter Overload Protectors

Motor Starter Overload Protectors

Upgrade your motor starter protector to use less energy and emit less heat

Tilt Switches

Trip circuits when tilted; use as position indicators, pump level controls, and limit switches

Abrasive Blaster Safety Switches

Abrasive Blaster Safety Switches

Shut off abrasive blasters if the operator loses control; also known as deadman switches

Brakes

Control how much and how quickly your drive system slows down

DIP Switches

Slide actuators to open or close each circuit to configure instructions for electronic devices

Switch Guards

Prevent people from activating switches accidentally

Outlet Boxes

House electrical components such as on-off switches, receptacles, and dimmer knobs

Transfer Switches

Transfer Switches

Switch to backup power during an outage

Air Pulse Valves

Air Pulse Valves

Convert continuous flow into bursts that reduce air consumption in dryers and dust collectors

Audible Alarms

Everything from bells and whistles to horns and sirens

Fusible Link Switches

Fusible Link Switches

Use as a safety switch to shut off hydraulic equipment and other machinery when the link melts

Hydraulic On-Off Valves

Hydraulic On-Off Valves

Control the flow in high-pressure hydraulic systems

Light Switch Sensor Guards

Light Switch Sensor Guards

Protect light switch sensors from damage and vandalism

Photoelectric Sensors

Photoelectric Sensors

Detect objects from longer distances than proximity and ultrasonic sensors

RFID Reader/Writers

RFID Reader/Writers

Scan RFID tags to sort inventory, track items, and control building access

Switch Mounts

Mount switches to panel cutouts, tank walls, or conveyors

Tablets

Tough enough to withstand drops, grime, and heavy use

Temperature Controllers

Temperature Controllers

Precisely regulate process temperatures; more accurate than temperature switches

Temperature Switches

Temperature Switches

Turn heating equipment on or off at a specified temperature

Flow Switches

Turn equipment on or off when flow rate reaches a set point

Motor Voltage Monitors

Motor Voltage Monitors

Protect electric motors by cutting power when faults occur

Pull Switches

Tug on a cable or rope to turn on and off circuits, often for production lines along conveyors

Speaker Volume Controls

Speaker Volume Controls

Wire between your speakers and sound amplifier to adjust the volume

Switch Padding

Trigger an emergency stop when robot arms contact a worker or object

Decade Boxes

Test and troubleshoot circuits without needing to solder capacitors or replace resistors

Fire Alarm Pull Stations

Fire Alarm Pull Stations

Activate to send a signal to your control panel if there's a fire

Garage Door Openers

Garage Door Openers

Automatically open and close overhead doors; also known as jackshafts

Liquid-Dispensing Metering Valves

Liquid-Dispensing Metering Valves

Program to dispense a specific amount of liquid every time and shut off when set amount is reached

Motor Controller/Drives

Motor Controller/Drives

Determine settings such as steps, direction, and step resolution from one device

Motor Drives

Receive signals from a motor controller and deliver them to your stepper motor

RFID Readers

Read RFID cards when prototyping systems or scan RFID tags to control circuits

Speed-Monitoring Switches

Speed-Monitoring Switches

Avoid downtime and machinery damage by detecting slowdowns in drive trains and conveyors

USB Receptacles

USB Receptacles

Install in an outlet box to charge multiple devices

CB Radio Connectors

CB Radio Connectors

Sockets and receptacles to connect CB radios

Clutch/Brakes

Control when to transmit power with a clutch and when to hold a load in place with a brake

Conductivity Controllers

Conductivity Controllers

Turn pumps, mixers, and valves on and off based on a solution’s conductivity

Door Openers

Automatically open doors with a slight nudge

Enclosure Door Switches

Enclosure Door Switches

Control fans, lights, and other devices inside your enclosure when you open and close the door

Fingerprint Scanners

Fingerprint Scanners

Use fingerprints to confirm the identity of personnel before granting access to areas or equipment

Proximity Sensor Safety Barriers

Proximity Sensor Safety Barriers

Safely send power to sensors in volatile areas such as refineries and power plants

Touch-Pad Switches

Touch-Pad Switches

Lay flat or mount on a wall to alert you when doors open or objects are removed

Battery Switches

Battery Switches

Turn the knob to alternate between two batteries without interrupting power

Control Panels

Connect and monitor your fire alarm system

HMIs

Control PLCs, inverters, and other automated equipment

HVAC Flame Detectors

HVAC Flame Detectors

Replace flame detectors in HVAC equipment such as furnaces, ovens, water heaters, and boilers

Inertial Measurement Units

Inertial Measurement Units

Mount to robot arms, cranes, and vehicles to accurately track their movements

IO-Link Programmers

IO-Link Programmers

Configure your IO-Link devices without a PC, outlet, or separate software

Light Socket Pull Cords

Light Socket Pull Cords

Lengthen pull-chain light switches

Pull-Chain Switches

Pull-Chain Switches

Pull a chain to send a signal, such as for turning on and off lights and fans

Reference Books

Reference Books

Keep industrial information, regulations, and processes on hand

Signal Output Testers

Signal Output Testers

Check if the signal output of a DC switch is NPN or PNP to know how to wire components

Slide Switches

Like a flashlight, the switch slides from one side to the other to turn circuits on and off

Smoke Detector Test Stations

Smoke Detector Test Stations

Test hard-to-reach HVAC smoke detectors from a convenient location

Tablet Holders

Keep a firm grip on your tablet to prevent accidental drops

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)