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.

These relays switch through a series of different circuit configurations every time they receive an input voltage. The input voltage latches them in position, so they don’t require a constant voltage to stay switched. Use them to control motors, pumps, and lighting. The covered terminals prevent contact with live connections. Mount to 35 mm DIN rail. Also known as step relays.

For use with equipment that cycles on and off, these relays meet UL 508 for air conditioning and heating. Connections are accessible from the front, so you can mount relays side-by-side. Also known as definite-purpose contactors.

Auxiliary contacts for 3.8"-7.2" Ht. relays are also available. They allow you to add a signaling device or control another relay. Please select 6564K99, then select the McMaster-Carr part number of your relay and whether you want to switch one circuit on or off.

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. Since star configuration takes less voltage to start than delta, these relays prevent voltage dips that often happen when a motor starts and are gentler on mechanical parts. Mount these relays directly to 35 mm DIN rail (also known as DIN 3 rail) for quick installation.

Use these relays with industrial automation systems, security and emergency lighting, and small motors. They’re also known as power relays. Hardwire them to your circuit using the screw terminals.

Relay Covers—Relay covers protect contacts from dust and dirt.

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

Heat Sinks—Heat sinks disperse heat to increase the relay’s current rating. Mount them to 35 mm DIN rail (also known as DIN 3 rail) for fast installation. They also mount to flat surfaces. Before mounting one-circuit relays, silicone compound or a thermal pad should be placed between the heat sink and relay. Silicone compound is sold separately for heat sinks that do not include it but require it. Two-circuit relays don’t require silicone for mounting.

An enclosure covers the terminals on these relays to help prevent damage from dust or accidental bumps. They have an LED indicator, so you can quickly see what switching position your relay is in. Hardwire them to your equipment with the included wire leads. Rated NEMA 1, these relays are intended for indoor use only.