Machine Switches | McMaster-Carr

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5,012 Products

Electrical Power, Networking, and Controlling

Lever Switches

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

155 products

Push-Button Switches

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

389 products

Switch Contact Blocks

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

40 products

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

260 products

Motor Switches

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

45 products

Rocker Switches

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

121 products

Toggle Switches

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

127 products

Emergency Stop Switches

Cut power to equipment during emergencies

190 products

Key Switches

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

77 products

Timer Switches

Automatically turn electrical equipment on or off after a set interval

108 products

Switch Mats

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

45 products

Snap-Acting Switches

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

209 products

Switch Guards

Prevent people from activating switches accidentally

2 products

Finger-Touch Switches

Lightly touch with your finger to turn circuits on and off

36 products

Battery Switches

Turn the knob to alternate between two batteries without interrupting power

1 product

Switch Padding

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

4 products

Rotary Switches

Control multiple devices with a single switch

13 products

Enclosure Door Switches

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

2 products

Photoelectric Sensors

Detect objects from longer distances than proximity and ultrasonic sensors

1 product

Bumper Switches

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

31 products

Limit Switches

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

153 products

Magnetic Switches

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

2 products

Switch Mounts

Mount switches to panel cutouts, tank walls, or conveyors

5 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

Enabling Switches

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

18 products

Foot Switches

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

94 products

Pendant Switches

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

93 products

Pull Switches

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

4 products

Doorbell Switches

Activate doorbells or buzzers with the push of a button

22 products

Slide Switches

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

1 product

DIP Switches

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

7 products

Joystick Switches

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

15 products

Air-Actuated Switches

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

13 products

Fingerprint Scanners

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

3 products

Pull-Chain Switches

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

1 product

Relays

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

414 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

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

27 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

Air-Actuated Relays

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

1 product

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

Proportional-Control Relays

Gradually adjust output instead of turning on or off

12 products

Motor Starters

Turn motors on and off and protect them from current overloads

451 products

Motor Starter Overload Protectors

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

8 products

Potentiometers

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

32 products

Motor Voltage Monitors

Protect electric motors by cutting power when faults occur

5 products

IO-Link Programmers

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

1 product

Transistors

Boost weak electrical signals and rapidly control data transmission

20 products

Power Receptacles

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

70 products

Outlet Boxes

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

8 products

Circuit Breakers

Reusable way to interrupt circuits when they overload or short

432 products

Lighting

Light Switch/Receptacles

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

3 products

Measuring and Inspecting

Decade Boxes

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

3 products

Fluid Handling

Float Switches

Start process equipment such as pumps and motors when the liquid in your tank reaches the float

130 products

Pressure Switches

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

310 products

Float Switch Relays

Amplify current to actuate equipment that has a higher current rating than your float switch

2 products

Vacuum Switches

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

26 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

177 products

Pressure and Vacuum Switches

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

6 products

Heating, Ventilation, and Air Conditioning

HVAC Switches

Control and monitor airflow in HVAC systems automatically

3 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

Communication

RFID Readers

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

8 products