240V AC Switches | McMaster-Carr

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439 Products

Switches

Overhead Rope-Pull Switches

Pull the hanging rope in any direction 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. Equipment will not start up again until switch is manually reset.

Low-Profile Wet-Location Limit Switches

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

Corrosion-Resistant Washdown Limit Switches

Rated NEMA 6P, 13, and IP67, these switches are protected from corrosion, oil/coolant spraying, washdowns, and temporary submersion.

Sealed Wet-Location Limit Switches

Sealed actuators prevent these switches from jamming, even when exposed to sand, mud, or dirt. They're rated IP67 for protection from temporary submersion.

Compact Safety Limit Switches

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

Manual-Reset Safety Limit Switches

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

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.

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.

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.

High-Current Wall-Mount Timer Switches

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

Power-Saving Panel-Mount Timer Switches

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

Panel-Mount Timer Switches

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

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

Spade-Terminal Relays

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

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.

Circular-Pin Relays

The circular pin terminals plug into relay sockets for easy 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.

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.

DIN-Rail Mount Interface Relays

Prevent damage from voltage spikes, reduce signal interference, and amplify signal with these relays, which interface between your controller and components to isolate input and output circuits.

PCB-Mount Relays

Solder these relays directly to printed circuit boards using 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.

Screw Terminal Relays

Use the screw terminals to hardwire these relays.

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.

Air-Actuated Relays

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

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.

Safety Relays with Diagnostic Capabilities

Control and diagnose issues with safety-critical circuits.

Alternating Relays

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

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.

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.

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.

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.

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.

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 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.

Multifunction Timer Relays

Get a variety of timing functions in a single relay.

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 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 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.

Switches

Overhead Rope-Pull Switches

Cable-Pull Switches

Low-Profile Wet-Location Limit Switches

Corrosion-Resistant Washdown Limit Switches

Sealed Wet-Location Limit Switches

Compact Safety Limit Switches

Manual-Reset Safety Limit Switches

Safety Limit Switches

High-Current Time and Day Activated Switches

Outdoor High-Current Timeand Day Activated Switches

Outdoor Set-to-the-Minute High-CurrentTime and Day Activated Switches

Set-to-the-Minute High-CurrentTime and Day Activated Switches

High-Current Wall-Mount Timer Switches

Power-Saving Panel-Mount Timer Switches

Panel-Mount Timer Switches

DIN-Rail Mount Motor Voltage Monitors

Surface-Mount Motor Voltage Monitors

Socket-Mount Motor Voltage Monitors

Durable Disconnect Switches

Outdoor Durable Disconnect Switches

Manual Transfer Switches

Relays

Spade-Terminal Relays

DIN-Rail Mount Solid State Relays

Circular-Pin Relays

DIN-Rail Mount Touch-Safe Screw Terminal Relays

Solid State Screw Terminal Relays

DIN-Rail Mount Interface Relays

PCB-Mount Relays

Hazardous Location Relays

Screw Terminal Relays

DIN-Rail Mount Solid State Interface Relays

Air-Actuated Relays

Solid State Spade-Terminal Relays

Safety Relays with Diagnostic Capabilities

Alternating Relays

Latching Relays

Compact Programmable Logic Controllers

Compact Programmable Logic Controllers

Timer Relays

Timer Relays

Solid State Surface-Mount Timer Relays

Solid State Versa-Mount Multifunction Timer Relays

DIN-Rail Mount Multifunction Timer Relays

Dual-Channel DIN-Rail MountMultifunction Timer Relays

Solid State DIN-Rail MountMultifunction Timer Relays

Solid State Versa-Mount Timer Relays

Multifunction Timer Relays

Solid State DIN-Rail Mount Timer Relays

Solid State DIN-Rail MountMultifunction Interface Timer Relays

DIN-Rail Mount Multifunction Interface Timer Relays

Outdoor High-Current Time
and Day Activated Switches

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

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

Dual-Channel DIN-Rail Mount
Multifunction Timer Relays

Solid State DIN-Rail Mount
Multifunction Timer Relays

Solid State DIN-Rail Mount
Multifunction Interface Timer Relays