Screw Terminal Switches | McMaster-Carr

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Rocker Switch with Mini Slide Dimmer

Rocker Switch with Push Button Dimmer

Toggle Switch with Mini Slide Dimmer

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Number of Circuits Controlled

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Compliant with Exemptions

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DFARS Specialty Metals

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Export Control Classification Number (ECCN)

5A991

EAR99

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

REACH

2,434 Products

Electrical Power, Networking, and Controlling

Toggle Switches

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

77 products

Lever Switches

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

146 products

Push-Button Switches

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

279 products

Switch Contact Blocks

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

37 products

Motor Switches

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

45 products

Limit Switches

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

68 products

Snap-Acting Switches

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

51 products

Emergency Stop Switches

Cut power to equipment during emergencies

139 products

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

117 products

Doorbell Switches

Activate doorbells or buzzers with the push of a button

22 products

Timer Switches

Automatically turn electrical equipment on or off after a set interval

78 products

Rocker Switches

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

11 products

Key Switches

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

34 products

Safety Switches

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

45 products

Foot Switches

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

28 products

Rotary Switches

Control multiple devices with a single switch

6 products

Ethernet Switches

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

35 products

Pull Switches

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

4 products

Pendant Switches

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

37 products

Magnetic Switches

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

8 products

Enabling Switches

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

9 products

Proximity Sensor Safety Barriers

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

2 products

Photoelectric Sensors

Detect objects from longer distances than proximity and ultrasonic sensors

6 products

Transfer Switches

Switch to backup power during an outage

2 products

Proximity Sensors

Detect the presence or position of objects from a short sensing distance

1 product

PLCs

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

13 products

PLC Expansion Modules

Connect switches, transmitters, and actuators to your PLC for complex automation jobs

22 products

Potentiometers

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

4 products

DC Motor Drives

Control the speed and torque of DC electric motors

9 products

Motor Voltage Monitors

Protect electric motors by cutting power when faults occur

3 products

Motor Starter Switches

Combine with a thermal overload element to build a starter that can handle high-current-rated motors

13 products

Motor Starter Overload Protectors

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

8 products

HMIs

Control PLCs, inverters, and other automated equipment

24 products

Relays

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

202 products

Timer Relays

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

19 products

Proportional-Control Relays

Gradually adjust output instead of turning on or off

12 products

Interface Relays

Isolate input and output circuits to protect PLCs and other controllers

59 products

Lighting Relays

Control lighting circuits and switch lighting systems on or off

13 products

Monitoring Relays

Trip circuits or sound an alarm when voltage, current, or other limits are exceeded

16 products

Latching Relays

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

20 products

Safety Relays

Monitor circuits and force machines to a safe stop if the relay detects a fault

34 products

Infrequent-Cycle Relays

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

147 products

Air-Actuated Relays

Convert an air signal on a pneumatic control system to an electric one

1 product

Circuit Breakers

Reusable way to interrupt circuits when they overload or short

35 products

Lighting

Light Switches

Manually turn lights on and off

35 products

Light Switch/Receptacles

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

3 products

Light Dimmers

Adjust the brightness of lights, even in large workspaces

3 products

Light Sockets

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

6 products

Light Switch Sensors

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

11 products

Light Switch Sensor Controllers

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

2 products

Fluid Handling

Humidity Controllers

Monitor humidity and control it by automatically turning equipment on and off

1 product

Temperature Controllers

Precisely regulate process temperatures; more accurate than temperature switches

82 products

Temperature Switches

Turn heating equipment on or off at a specified temperature

88 products

Water Heater Thermostats

Replace the thermostat on your water heater

3 products

Pressure Switches

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

157 products

Differential Pressure Switches

Activate controls and alarms when the pressure difference between process lines exceeds a setpoint

47 products

Pressure and Vacuum Switches

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

3 products

Vacuum Switches

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

4 products

Directional Control Valves

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

25 products

Safety Equipment

Smoke Detector Test Stations

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

1 product

Smoke Detectors

Warn people when there's smoke in your facility

6 products