3A Switches | McMaster-Carr

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Actuator Style

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Switching Voltage

208V AC to 600V AC

3V DC to 33V DC

4V DC to 48V DC

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Number of Circuits Controlled

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Illumination

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180 Products

Electrical Power, Networking, and Controlling

Push-Button Switches

Push-Button Switches

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

Toggle Switches

Toggle Switches

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

Limit Switches

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

Emergency Stop Switches

Emergency Stop Switches

Cut power to equipment during emergencies

Switch Contact Blocks

Switch Contact Blocks

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

Pull-Chain Switches

Pull-Chain Switches

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

Rotary Switches

Rotary Switches

Control multiple devices with a single switch

Foot Switches

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

Snap-Acting Switches

Snap-Acting Switches

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

Doorbell Switches

Doorbell Switches

Activate doorbells or buzzers with the push of a button

Pull Switches

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

Safety Switches

Safety Switches

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

Magnetic Switches

Magnetic Switches

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

Key Switches

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

Photoelectric Sensors

Photoelectric Sensors

Detect objects from longer distances than proximity and ultrasonic sensors

Pendant Switches

Pendant Switches

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

Monitoring Relays

Monitoring Relays

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

Safety Relays

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

Relays

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

Interface Relays

Interface Relays

Isolate input and output circuits to protect PLCs and other controllers

Latching Relays

Latching Relays

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

Timer Relays

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

Motor Starters

Turn motors on and off and protect them from current overloads

Lighting

Light Switches

Manually turn lights on and off

Fabricating and Machining

Abrasive Blaster Safety Switches

Abrasive Blaster Safety Switches

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

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