240V AC Switches | McMaster-Carr

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High-Pressure Washdown

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Wire Connection

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C-UL Recognized Component

TUV Rheinland Certified

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UL Listed

UL Recognized Component

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Actuator Height

Electrical Phase

Switch Type

Horsepower @ Switching Voltage

Number of Mounting Holes

Export Control Classification Number (ECCN)

EAR99

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DFARS Specialty Metals

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608 Products

Manual Switches

High-Visibility Plastic 22 mm Emergency
Stop Panel-Mount Push-Button Switches

A base that lights up draws attention to emergency stops. When pushed, these switches immediately cut power.

8 mm Panel-Mount Push-Button Switches

Install in 8 mm dia. cutouts.

Enclosed Push-Button
Switches for T-Slotted Framing

Snap these switches onto your T-slotted framing rails—no need to drill or disassemble your existing structure.

Emergency Stop Enclosed Push-Button
Switches for T-Slotted Framing

Clip these switches onto nearby structures made from T-slotted framing to quickly cut power with the push of a button.

Foot Switches

Keep your hands free for other tasks by triggering switches with your foot.

Washdown 3/4" Panel-Mount Key Switches

Rated NEMA 4 or IP66, these switches are protected from washdowns.

Overhead Rope-Pull Switches

Tug the hanging rope to actuate these switches.

Cable-Pull Switches

Connect these switches to a cable to control circuits from a distance. They're typically used to turn off production lines and material handling systems.

Limit Switches

When a moving object contacts the actuator on these switches, they open or close a circuit. They have the rapid-closing action of a snap-acting switch, but with a larger actuator for large objects.

Build-Your-Own Limit Switches

Combine an actuator and a switch to assemble the exact limit switch you need.

Low-Profile Limit Switches

Stack these slim switches together, or fit them into tight spaces. They're rated IP67 for protection from temporary submersion.

Sealed Low-Profile Limit Switches

A sealed actuator prevents these switches from jamming, even when exposed to sand, mud, or dirt. With a slim design, you can stack them together or fit them in tight spaces.

Compact Safety Limit Switches

Shorter and thinner than other safety limit switches, these are sized to fit tight spaces.

Safety Limit Switches

Protect machinery and ensure the safety of personnel—these switches will open the circuit when actuated even if a spring fails or the contacts stick.

Manual-Reset Safety Limit Switches

Prevent equipment from automatically restarting—these switches must be manually reset each time they're actuated.

Washdown Limit Switches

Rated NEMA 3S and IP69K, these switches can handle washdowns with high pressures and temperatures. They’re also protected from oil/coolant spraying, precipitation, and temporary submersion.

Frame-Mounted Safety Switches

Also known as interlock switches, these ensure the safety of personnel by automatically shutting off power to machinery when an access door opens. They’re often used with machine guards.

Timer Switches

High-Current Wall-Mount Timer Switches

Control equipment with high currents such as air conditioners, heaters, and ventilation fans.

Panel-Mount Timer Switches

Install these switches in a panel cutout to automatically turn electrical equipment on or off after a set interval.

Power-Saving Panel-Mount Timer Switches

Push and release the button to activate—no electricity required.

High-Current Time and Day Activated Switches

Control equipment with high currents, such as landscape lighting, pumps, and heaters.

Outdoor High-Current Time
and Day Activated Switches

Rated NEMA 3R, these rain-tight switches protect against falling liquids and light splashing.

Smart Time and Day Activated Switches

Use your smart phone to turn equipment on and off at a set time and day.

Outdoor Set-to-the-Minute High-Current
Time and Day Activated Switches

Rated NEMA 3R, these rain-tight switches protect against falling liquids and light splashing.

Set-to-the-Minute High-Current
Time and Day Activated Switches

For precise control of high-current equipment such as landscape lighting, pumps, and heaters, these switches schedule on/off times to the exact minute.

Motor Voltage Monitors

DIN-Rail Mount Motor Voltage Monitors

Mount these monitors to DIN rail.

Surface-Mount Motor Voltage Monitors

Use the mounting holes to attach monitors to a flat surface.

Socket-Mount Motor Voltage Monitors

Plug monitors into relay sockets for fast installation and replacement.

Durable Disconnect Switches

Protected by a steel enclosure, these switches withstand tougher conditions than switches in a plastic housing. Also known as safety switches, they have quick-make/quick-break action to eliminate arcing and prolong switch life.

Outdoor Durable Disconnect Switches

A raintight NEMA 3R rated enclosure protects these switches outdoors.

Manual Transfer Switches

If there’s a power outage, flip the toggle for each circuit on these switches to backup power.

Relays

DIN-Rail Mount Solid State Relays

Unlike mechanical relays, these solid state relays have no moving parts, so they require less maintenance and last longer, switch faster, and are quieter. They mount on 35 mm DIN rail (also known as DIN 3) for fast installation.

DIN-Rail Mount Touch-Safe Screw Terminal Relays

Quickly and safely mount these relays on 35 mm DIN rail (also known as DIN 3). IP20 rated, they have recessed terminals that prevent fingers and other objects from touching live circuits.

DIN-Rail Mount Solid State Interface Relays

With no moving parts, these solid state relays last longer, switch faster, and are quieter than mechanical relays. They interface between your controller and components to isolate input and output circuits, which protects components from voltage spikes, amplifies the relay’s signal, and reduces interference for reliable transmission.

DIN-Rail Mount Interface Relays

Isolate input and output circuits to prevent damage from voltage spikes, reduce signal interference, and amplify signal.

Solid State Screw Terminal Relays

With no moving parts, these solid-state relays are fast switching and require less maintenance, last longer, and are quieter than mechanical switches.

Screw Terminal Relays

Use the screw terminals to hardwire these relays.

Spade-Terminal Relays

Using a low-current signal, these relays are often used to control small motors and heaters.

Solid State Spade-Terminal Relays

Often used for high-speed switching at low-current levels, these solid state relays have no moving parts, so they switch faster, last longer, and are quieter than mechanical switches.

Circular-Pin Relays

The circular pin terminals plug into relay sockets for easy installation.

Circuit Board Relays

Smaller than relays with electrical wiring, these relays fit in compact devices. Mount them through holes on circuit boards with their solder pin terminals.

Hazardous Location Relays

Sealed for safety, these relays are a good choice for hazardous locations where combustible or corrosive gases may be present.

Latching Relays

A single, momentary input voltage switches these relays and locks them in position, so they don't require a constant input voltage to stay on or off.

Safety Relays

Receive signals from safety monitoring relays or controllers to switch devices off and on because of a system failure.

Safety Relays with Diagnostic Capabilities

Control and diagnose issues with safety-critical circuits.

Circuit Board Safety Relays

Reduce connection errors on circuit boards that control machine guards and other safety devices. These relays take up less space on a board than those with electrical wiring because their solder pin terminals mount directly through circuit board holes.

Interface Safety Relays

These relays pair the transmission reliability of an interface relay with the fail-safe operation of a safety relay. They have interlocking contacts—also known as force-guided or mechanically linked contacts—so opposing contacts won't close at the same time.

Air-Actuated Relays

Also known as an air-to-electric switch, this relay converts an air signal to an electric signal.

Alternating Relays

Split run time between two devices—these relays automatically alternate between them.

Monitoring Relays

Smart Multifunction Monitoring Relays

Remotely control these relays through an app on your smartphone—they simultaneously monitor phase, voltage, and frequency.

Voltage-Monitoring Relays

Safeguard your equipment against overheating, wear, and malfunction from a spike or dip in voltage.

Frequency-Monitoring Relays

Prevent changes in frequency from damaging sensitive equipment.

Multifunction Monitoring Relays

Monitor phase, voltage, and frequency at the same time to protect motors, generators, and other three-phase circuits from burning out or overheating.

Current-Monitoring Relays

Protect electrical equipment from overcurrent and undercurrent damage—these relays continuously monitor current flow.

Ground-Fault Monitoring Relays

Detect and mitigate ground faults to prevent harm to equipment, circuits, and people.

Compact Programmable Logic Controllers

Smaller than other PLCs, these controllers save space in your control cabinet. They combine the functionality of a relay, timer relay, and switch in one unit, so you can program simple automation jobs.

Timer Relays

Turn machinery, such as paint and conveyor lines, on and off after a set period of time.

Solid State Surface-Mount Timer Relays

Attach these relays to a flat surface using the mounting hole. They have no moving parts, so compared to mechanical switches, they require less maintenance, last longer, and are quieter.

Dual-Channel DIN-Rail Mount
Multifunction Timer Relays

Control two steps of an electrical process from a single relay—with two fully independent channels and 30 different functions, these relays give you a wide range of possibilities.

High-Starting-Current DIN-Rail Mount Timer Relays

Reduce voltage fluctuations and stress on shafts and bearings when starting up three-phase motors. These timer relays start with motor contacts in a star configuration, then switch to a delta configuration after a set delay.

Solid State DIN-Rail Mount
Multifunction Interface Timer Relays

Considered solid state because they don’t have any moving parts, these timer relays last longer, switch faster, and are quieter than mechanical relays. They interface between your controller and components to isolate input and output circuits, preventing damage to your components from voltage spikes, amplifying the relay's signal, and reducing signal interference. They have multiple timing functions, so you don’t need to swap out your relay if you want to change their function.

DIN-Rail Mount Multifunction Timer Relays

Control multiple timing functions from your electrical cabinet—these timer relays mount to 35 mm DIN rail (also known as DIN 3 rail), which is the most commonly used size.

Solid State DIN-Rail Mount Timer Relays

Mount these timer relays directly to 35 mm DIN rail (also known as DIN 3 rail) for fast installation. Unlike mechanical relays, they have no moving parts, so they require less maintenance and last longer, are quieter, and switch faster.

Solid State DIN-Rail Mount
Multifunction Timer Relays

For fast installation, mount these relays directly to 35 mm DIN rail (also known as DIN 3 rail). With no moving parts, these solid state relays last longer and require less maintenance, are quieter, and switch faster than mechanical relays.

Solid State Versa-Mount Multifunction Timer Relays

Install these relays in a panel cutout or plug them into a relay socket. Unlike mechanical relays, these solid state relays have no moving parts, so they require less maintenance and last longer, are quieter, and switch faster.

Solid State Versa-Mount Timer Relays

Mount these timer relays in a panel cutout or plug them into a relay socket for quick installation. Capable of fast switching, they are solid state and have no moving parts, so they require less maintenance, last longer, and are quieter than mechanical relays.

Smart DIN-Rail Mount Multifunction Timer Relays

Whether installed in an electrical cabinet or hard-to-reach area, these timer relays are controlled remotely from your smartphone. They connect to your phone via a free downloadable app so you can set time delay ranges, adjust settings, and save programs.

Multifunction Timer Relays

Get a variety of timing functions in a single relay.

DIN-Rail Mount Multifunction Interface Timer Relays

Protect components from voltage spikes while amplifying the relay’s signal and reducing interference for reliable transmission—these relays interface between your controller and system components to isolate the input and output circuits. They have multiple timing functions, so you don’t need to swap out your relay if you want to change their function.

Manual Switches

High-Visibility Plastic 22 mm EmergencyStop Panel-Mount Push-Button Switches

8 mm Panel-Mount Push-Button Switches

Enclosed Push-ButtonSwitches for T-Slotted Framing

Emergency Stop Enclosed Push-ButtonSwitches for T-Slotted Framing

Foot Switches

Washdown 3/4" Panel-Mount Key Switches

Overhead Rope-Pull Switches