4 Terminal Switches | McMaster-Carr

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Rocker Switch with Push Button Dimmer

Rocker Switch with Slide Dimmer

Toggle Switch with Mini Slide Dimmer

Wobble Stick

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Illuminated

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Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

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657 Products

Electrical Power, Networking, and Controlling

Lever Switches

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

63 products

Toggle Switches

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

19 products

Push-Button Switches

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

88 products

Rocker Switches

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

27 products

Limit Switches

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

48 products

Switch Contact Blocks

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

9 products

Emergency Stop Switches

Cut power to equipment during emergencies

44 products

Doorbell Switches

Activate doorbells or buzzers with the push of a button

2 products

Pull-Chain Switches

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

1 product

Safety Switches

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

15 products

Key Switches

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

24 products

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

7 products

Pull Switches

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

2 products

Enclosure Door Switches

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

1 product

Ethernet Switches

Expand your data network by connecting computers, printers, and servers

7 products

Timer Switches

Automatically turn electrical equipment on or off after a set interval

1 product

Relays

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

91 products

Latching Relays

Lock into position so they don't require constant voltage to stay switched

5 products

Interface Relays

Isolate input and output circuits to protect PLCs and other controllers

8 products

Vehicle Relays

Switch high-current loads on vehicles, such as starters, headlights, and fuel pumps

13 products

Proportional-Control Relays

Gradually adjust output instead of turning on or off

4 products

Timer Relays

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

6 products

Infrequent-Cycle Relays

Use with equipment that cycles on and off, such as HVAC systems

34 products

Lighting

Light Switches

Manually turn lights on and off

4 products

Light Dimmers

Adjust the brightness of lights, even in large workspaces

3 products

Measuring and Inspecting

Rotary Switches

Control multiple devices with a single switch

2 products

Signal Output Testers

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

1 product

Fluid Handling

Pressure Switches

Activate controls, set off alarms, and power equipment when a set pressure is reached

43 products