Electrical Switches | McMaster-Carr

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Abrasive Blaster Safety Switches

Air-Actuated Relays

Air-Actuated Switches

Alternating Relays

Audible Alarms

Automatic Door Switches

Battery Switches

Brackets

Bumper Switches

Cam Locks and Latches

Circuit Breakers

Control Panels

Conveyor Accessory Mounts

Cylinder Position Sensors

DC Motor Drives

Decade Boxes

DIP Switches

Directional Control Valves

System of Measurement

Switching Voltage

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Maintained

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High-Pressure Washdown

High-Temperature Washdown

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Mounting Location

Electrical Receptacle

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1/2" Circular Connector

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

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Export Control Classification Number (ECCN)

2B999

5A991

EAR99

DFARS Specialty Metals

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7,211 Products

Most Likely Products

Toggle Switches

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

126 products

Light Switches

Manually turn lights on and off

65 products

Lever Switches

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

156 products

Push-Button Switches

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

457 products

Key Switches

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

76 products

Rocker Switches

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

120 products

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

260 products

All Results

Electrical Power, Networking, and Controlling

Toggle Switches

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

126 products

Lever Switches

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

156 products

Push-Button Switches

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

457 products

Key Switches

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

76 products

Rocker Switches

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

120 products

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

260 products

Switch Contact Blocks

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

40 products

Motor Switches

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

45 products

Snap-Acting Switches

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

209 products

Foot Switches

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

94 products

Emergency Stop Switches

Cut power to equipment during emergencies

190 products

Battery Switches

Turn the knob to alternate between two batteries without interrupting power

1 product

Joystick Switches

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

15 products

Slide Switches

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

1 product

Limit Switches

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

153 products

Timer Switches

Automatically turn electrical equipment on or off after a set interval

108 products

Pull-Chain Switches

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

1 product

Rotary Switches

Control multiple devices with a single switch

13 products

Pendant Switches

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

107 products

Finger-Touch Switches

Lightly touch with your finger to turn circuits on and off

36 products

Magnetic Switches

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

120 products

Proximity Sensors

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

428 products

Air-Actuated Switches

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

13 products

Switch Guards

Prevent people from activating switches accidentally

2 products

Tilt Switches

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

8 products

Safety Switches

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

59 products

Switch Mats

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

45 products

Doorbell Switches

Activate doorbells or buzzers with the push of a button

22 products

DIP Switches

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

7 products

Bumper Switches

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

31 products

Transfer Switches

Switch to backup power during an outage

7 products

Pull Switches

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

4 products

Switch Mounts

Mount switches to panel cutouts, tank walls, or conveyors

5 products

Switch Padding

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

4 products

Enabling Switches

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

18 products

Enclosure Door Switches

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

2 products

Fingerprint Scanners

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

3 products

Photoelectric Sensors

Detect objects from longer distances than proximity and ultrasonic sensors

263 products

Safety Light Curtains

Immediately cut power to machinery when anything blocks the light beam

65 products

Ethernet Switches

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

68 products

Photoelectric Sensor Reflectors

Pair with reflector photoelectric sensors to bounce light back at them

38 products

Speed-Monitoring Switches

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

3 products

Touch-Pad Switches

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

4 products

Ribbon Switches

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

15 products

Automatic Door Switches

Doors open when you touch a button or the switches detect motion

18 products

Cylinder Position Sensors

Monitor your air cylinder rod's position and turn the cylinder on and off

8 products

Ultrasonic Sensors

Measure the distance to objects and the level of liquids and materials

21 products

Safety Light Curtain Mirrors

Deflect beams from a set of safety barrier switches to form a perimeter around machinery

10 products

Relays

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

414 products

Proportional-Control Relays

Gradually adjust output instead of turning on or off

12 products

Air-Actuated Relays

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

1 product

Timer Relays

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

201 products

Vehicle Relays

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

47 products

Latching Relays

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

29 products

Lighting Relays

Control lighting circuits and switch lighting systems on or off

13 products

Interface Relays

Isolate input and output circuits to protect PLCs and other controllers

79 products

Monitoring Relays

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

31 products

Infrequent-Cycle Relays

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

147 products

Safety Relays

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

64 products

Alternating Relays

Automatically split run time between two devices so one isn't always running

2 products

Motor Starters

Turn motors on and off and protect them from current overloads

451 products

Potentiometers

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

26 products

PLCs

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

82 products

IO-Link Programmers

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

1 product

Control Panels

Connect and monitor your fire alarm system

1 product

DC Motor Drives

Control the speed and torque of DC electric motors

9 products

Motor Starter Overload Protectors

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

8 products

Motor Voltage Monitors

Protect electric motors by cutting power when faults occur

5 products

VFDs

Control the speed and torque of AC electric motors

19 products

Linear Position Sensors

Measure the position of an object moving in a straight line; also known as string pots

16 products

Transistors

Boost weak electrical signals and rapidly control data transmission

20 products

Circuit Breakers

Reusable way to interrupt circuits when they overload or short

439 products

Fusible Link Switches

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

10 products

Power Receptacles

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

64 products

I/O Modules

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

28 products

Power Cords

Connect equipment and devices to a power source

9 products

Outlet Boxes

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

8 products

Lighting

Light Switches

Manually turn lights on and off

65 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

18 products

Light Switch Sensors

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

81 products

Light Switch Sensor Controllers

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

9 products

Light Sockets

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

2 products

Light Socket Pull Cords

Lengthen pull-chain light switches

1 product

Safety Equipment

Smoke Detector Test Stations

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

1 product

Fire Alarm Pull Stations

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

5 products

Smoke Detectors

Warn people when there's smoke in your facility

21 products

Fluid Handling

Solenoid On/Off Valves

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

714 products

Directional Control Valves

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

253 products

Level Sensor Switches

Activate equipment by detecting the liquid level in a tank

29 products

Flow Switches

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

8 products

Liquid-Dispensing Metering Valves

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

3 products

Noncontact Temperature Sensor Transmitters

Send temperature readings of molten steel, furnaces, and other extremely hot surfaces to your PLC

10 products

Building and Machinery Hardware

Indicating Knobs

Control devices and view settings at a glance

89 products

T-Slotted Framing Switches

Attach to your rail to actuate components or cut power

10 products

Brackets

Connect surfaces in an assembly

64 products

Cam Locks

Unlock with a key, magnetic fob, screwdriver, or number combination

18 products

Measuring and Inspecting

Decade Boxes

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

3 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

Thermometer Air Purges

Blow dust and moisture off infrared thermometer transmitter lenses

1 product

Thermometer Cooling Jackets

Connect to a compressed air or water line to keep infrared thermometer transmitters from overheating

1 product

Thermometer Insulating Tubes

Prevent infrared thermometer transmitters from overheating by shielding them from hot surfaces

1 product

Thermometer Covers

Prevent dirt buildup on infrared thermometer transmitters

1 product

Communication

Audible Alarms

Everything from bells and whistles to horns and sirens

8 products

RFID Readers

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

8 products

Tablet Holders

Walk around your facility with your tablet firmly in hand

1 product

Speaker Volume Controls

Wire between your speakers and sound amplifier to adjust the volume

4 products

Fabricating and Machining

Abrasive Blaster Safety Switches

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

11 products

Power Transmission

Hydraulic On/Off Valves

Control the flow in high-pressure hydraulic systems

8 products

Material Handling

Conveyor Accessory Mounts

Position guides or sensors to the exact spot needed for your conveyor

54 products

Heating, Ventilation, and Air Conditioning

HVAC Flame Detectors

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

1 product