3A Switches | McMaster-Carr

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181 Products

Most Likely Products

Push-Button Switches

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

6 products

Toggle Switches

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

6 products

Emergency Stop Switches

Cut power to equipment during emergencies

14 products

Limit Switches

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

33 products

Switch Contact Blocks

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

5 products

Rotary Switches

Control multiple devices with a single switch

5 products

All Results

Electrical Power, Networking, and Controlling

Push-Button Switches

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

6 products

Toggle Switches

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

6 products

Emergency Stop Switches

Cut power to equipment during emergencies

14 products

Limit Switches

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

33 products

Switch Contact Blocks

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

5 products

Pull-Chain Switches

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

1 product

Foot Switches

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

12 products

Doorbell Switches

Activate doorbells or buzzers with the push of a button

17 products

Pull Switches

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

3 products

Snap-Acting Switches

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

11 products

Magnetic Switches

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

8 products

Pendant Switches

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

1 product

Key Switches

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

2 products

Safety Switches

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

5 products

Sensor Switches

Detect moving objects from a distance, triggering a circuit to open or close

6 products

Motor Starters

Turn motors on and off and protect them from current overloads

1 product

Monitoring Relays

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

12 products

Relays

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

4 products

Interface Relays

Isolate input and output circuits to protect PLCs and other controllers

1 product

Safety Relays

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

4 products

Timer Relays

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

7 products

Latching Relays

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

3 products

Measuring and Inspecting

Rotary Switches

Control multiple devices with a single switch

5 products

Lighting

Light Switches

Manually turn lights on and off

1 product