Surface Relays | McMaster-Carr

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469 Products

About Relays

Long-Life Spade-Terminal Relays

With no moving parts, these solid state spade-terminal relays have an extended service life.

Screw Terminal Relays

Use the screw terminals to hardwire these relays.

Machine-Guard Safety Screw Terminal Relays

The interlocked opposing contacts won't close at the same time, so these relays are suitable for safety applications such as machine guarding.

Enclosed Medium-Current Relays

The built-in enclosure protects contacts from dust and dirt.

Medium-Current Relays

These relays are rated for motors with 1-3 horsepower or 15-90 amps—use them with industrial automation systems, security and emergency lighting, and small motors. Also known as power relays.

Long-Life Medium-Current Relays

With no moving parts, these solid state medium-current relays have an extended service life.

High-Starting-Current Vehicle Relays

Also known as automotive relays, these relays can handle high starting (inrush) currents.

Weatherproof High-Starting-Current Vehicle Relays

The extended housing covers and protects terminals.

Water-Resistant High-Current Vehicle Relays

High-Current Vehicle Relays

Suitable for DC-powered equipment such as forklifts, floor scrubbers, and trucks.

High-Current Relays

Use these relays with large motors and lighting systems.

DIN-Rail Mount Long-Life High-Current Relays

With no moving parts, these solid state relays have an extended service life. Mount them directly to DIN rail.

Infrequent-Cycle High-Current Relays

For use with equipment that cycles on and off, these relays meet UL 508 for air conditioning and heating. Also known as definite-purpose contactors.

DIN-Rail Mount Infrequent-Cycle High-Current Relays

Mount these relays directly to DIN rail.

Signal Relays

Use these relays with circuits that control electric signals for PLCs and microprocessors.

Timer Relays

Long-Life DIN-Rail Mount Multifunction Timer Relays

With no moving parts, these solid state relays have an extended service life.

Long-Life Surface-Mount Timer Relays

With no moving parts, these solid state relays have an extended service life.

Surface-Mount Timer Relays

Use the mounting hole to attach these relays to a flat surface.

Medium-Current Timer Relays

Also known as power relays, these relays are rated for 1 horsepower or 30 amps and are suitable for compressors, blowers, and heaters.

Relay Sockets

Mount to DIN rail or flat surfaces, then plug your relay into the socket for fast installation.

Motor Control Switches

Energy-Saving Motor Starters

Save electricity and extend motor life by reducing the motor's starting current.

DIN-Rail Mount Motor Voltage Monitors

Mount these monitors to DIN rail.

Easy-Program Logic Controllers

Design and operate up to six simultaneous programs without symbols or technical language—the on-screen instructions use simple English.