Switches | McMaster-Carr

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7,224 Products

Electrical

Manual Switches

Manual Switches

Everything from toggle, push-button, and rocker switches to foot switches

Snap-Acting Switches

Snap-Acting Switches

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

Motor Switches

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

Limit Switches

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

Disconnect Switches

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

Light Switches

Manually turn lights on and off

Ethernet Switches

Ethernet Switches

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

Sensor Switches

Sensor Switches

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

Switch Safety Barriers

Switch Safety Barriers

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

Photoelectric Switch Reflectors

Photoelectric Switch Reflectors

Pair with sensor switches to reflect light back at them

Relays

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

Switch Guards

Prevent people from activating switches accidentally

Safety Switches

Safety Switches

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

Light Dimmers

Adjust the brightness of lights, even in large workspaces

Magnetic Switches

Magnetic Switches

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

Timer Switches

Automatically turn electrical equipment on or off after a set interval

Potentiometers

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

Potentiometer Panel Seals

Potentiometer Panel Seals

Keep moisture and dust out of potentiometers

Motor Starters

Turn motors on and off and protect them from current overloads

Motor Starter Overload Protectors

Motor Starter Overload Protectors

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

Light Switch Sensors

Light Switch Sensors

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

Tilt Switches

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

Programmable Logic Controllers

Programmable Logic Controllers

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

Programmable Logic Controller Expansion Modules

Programmable Logic Controller Expansion Modules

Increase the number of inputs and outputs for your PLC

Vibration Switches

Vibration Switches

Monitor vibration in machinery and shut it down or sound an alarm if levels rise

Timer Relays

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

Control Panels

Connect and monitor your fire alarm system

Transfer Switches

Transfer Switches

Switch to backup power during an outage

Bumper Switches

Bumper Switches

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

Speed-Monitoring Switches

Speed-Monitoring Switches

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

Fusible Link Switches

Fusible Link Switches

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

Motor Speed Controls

Motor Speed Controls

Manage the speed of AC and DC motors

Light Curtains

Immediately cut power to machinery when anything blocks the light beam

Switch Mounts

Mount sensor switches to panel cutouts, tank walls, or conveyors

Motor Voltage Monitors

Motor Voltage Monitors

Protect electric motors by cutting power when faults occur

Human-Machine Interfaces

Human-Machine Interfaces

Control PLCs, inverters, and other automated equipment; also known as HMIs

Transistors

Boost weak electrical signals and rapidly control data transmission

Circuit Breakers

Circuit Breakers

Reusable way to interrupt circuits when they overload or short

Electrical Connectors and Cords

Electrical Connectors and Cords

Supply power to equipment by combining plugs, sockets, receptacles, and cords

Data Connection Hubs

Data Connection Hubs

Add USB ports to a computer to connect more devices

Electrical Connector Boots

Electrical Connector Boots

Protect connectors and cords from strain, bends, and pulls

Terminals

Attach to the end of wire to connect circuits in control panels, motors, and small machines

Battery Chargers

Battery Chargers

Charge everything from large-cell to cordless tool to household batteries

Outlet Boxes

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

Electrical Enclosures

Electrical Enclosures

House and protect power supplies, control panels, and other electrical equipment

Fluid Handling

Directional Control Valves

Directional Control Valves

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

Float Switches

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

Float Switch Relays

Float Switch Relays

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

Level Sensor Switches

Level Sensor Switches

Activate equipment by detecting the liquid level in a tank

Flow Switches

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

On-Off Valves

Start and stop flow through a line

Air-Exhaust Valves

Air-Exhaust Valves

Vent or divert exhaust to speed up the operation of air cylinders, actuators, and other equipment

Paddle Level Switches

Paddle Level Switches

Actuate when the paddle stops rotating to indicate the level of dry material

Humidity Controllers

Humidity Controllers

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

Temperature Switches

Temperature Switches

Turn heating equipment on or off at a specified temperature

Temperature Controllers

Temperature Controllers

Precisely regulate process temperatures; more accurate than temperature switches

Humidistats

Control the humidity in an enclosure or space

Water Heater Thermostats

Water Heater Thermostats

Replace the thermostat on your water heater

Noncontact Temperature Sensors

Noncontact Temperature Sensors

Monitor the temperature of hazardous, sensitive, and hard-to-reach materials without touching them

Pressure Switches

Pressure Switches

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

Differential Pressure Switches

Differential Pressure Switches

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

Vacuum Switches

Vacuum Switches

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

Pressure and Vacuum Switches

Pressure and Vacuum Switches

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

Flow Transmitters

Flow Transmitters

Send flow rate measurements to PLCs, data loggers, and remote displays

Pressure and Vacuum Transmitters

Pressure and Vacuum Transmitters

Convert pressure and vacuum measurements into a signal sent to remote displays and controllers

Measuring and Inspecting

Thermometer Covers

Thermometer Covers

Prevent dirt buildup on infrared thermometer transmitters

Thermometer Air Purges

Thermometer Air Purges

Blow dust and moisture off infrared thermometer transmitter lenses

Thermometer Cooling Jackets

Thermometer Cooling Jackets

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

Thermometer Insulating Tubes

Thermometer Insulating Tubes

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

Signal Output Testers

Signal Output Testers

Check if the signal output of a DC switch is NPN or PNP to know how to wire components

Lighting

Lights

Ceiling, wall, portable, adjustable-arm, security, and backup lights as well as flashlights

Light Sockets

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

Light Socket Pull Cords

Light Socket Pull Cords

Lengthen pull-chain light switches

Heating, Ventilation, and Air Conditioning

HVAC Switches

Control and monitor airflow in HVAC systems automatically

Thermostats

Connect to heaters, fans, and air conditioners to control the temperature

HVAC Flame Detectors

HVAC Flame Detectors

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

Building and Machinery Hardware

Indicating Knobs

Indicating Knobs

Control devices and view settings at a glance

Control Cables

Weave around obstructions to operate valves, throttles, and other machinery from a distance

Garage Door Opener Receivers

Garage Door Opener Receivers

Wire to automatic overhead door openers to accept signals from remote and keypad transmitters

Garage Door Opener Internet Gateways

Garage Door Opener Internet Gateways

Use a smartphone or computer to control automatic overhead door openers

Garage Door Opener Transmitters

Garage Door Opener Transmitters

Send signals to receivers to open and close automatic overhead door openers

Positioning Arms

Positioning Arms

Mount and position tools, small electronics, and displays

Brackets

Connect surfaces in an assembly

Communication

Labels

Stick onto items to identify or convey information about them

Legend Plates

Mark switches and lights on control panels for easy identification

Speaker Volume Controls

Speaker Volume Controls

Wire between your speakers and sound amplifier to adjust the volume

Audible Alarms

Everything from bells and whistles to horns and sirens

Safety Equipment

Smoke Detector Test Stations

Smoke Detector Test Stations

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

Smoke Detectors

Smoke Detectors

Warn people when there's smoke in your facility

Fire Alarm Pull Stations

Fire Alarm Pull Stations

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

Fire Alarm Station Covers

Fire Alarm Station Covers

Shield your fire alarm pull stations from damage and tampering

Material Handling

Chain Hoist Replacement Parts

Chain Hoist Replacement Parts

Replace brake coils and discs, control pendants, and other parts on electric chain hoists

Robot Safety Padding

Robot Safety Padding

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

Tablet Holders

Equip tablets with safety switches to halt robots, conveyors, and other machinery in an instant

Conveyor Accessory Mounts

Conveyor Accessory Mounts

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

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.)