Industrial Plug-in Relays & Sockets

DIN-rail mounted relay-and-socket assemblies simplify installation while allowing the switching element to be replaced without rewiring.
We offer both slim interface modules and traditional plug-in relay assemblies, with multiple coil voltages, contact configurations and switching capacities available.
The compact PIR6W family, for example, is only 6.2 mm wide, mounts on 35 mm DIN rail and is available with electromagnetic or solid-state outputs. Electromagnetic versions are available up to 6 A depending on configuration.

Key Features
- Compact DIN-rail installation
- Replaceable plug-in relay
- AC, DC and AC/DC control voltage options
- Electromechanical and solid-state versions
- LED/status indication on selected versions
- Screw and spring-terminal socket options
- Bridging and marking accessories
- UL/cUL certified configurations available
Typical Applications: PLC interfaces · Control panels · Machine automation · Signal isolation · Solenoid and valve control · Building automation

Latching — or bistable — relays maintain their contact position after the control signal is removed. This makes them particularly useful where reduced power consumption, low heat generation or retention of switching state is required.
Unlike a conventional monostable relay that requires continuous coil energization to maintain its operated state, a latching relay changes state in response to a control pulse and remains in that state until a reset command is applied.
R4B industrial latching relay family is designed for plug-in sockets and can retain its state after loss of control power. The R4B system supports screw-terminal, Push-in, PCB and solder-terminal socket configurations.
Key Features
- Bistable switching operation
- Maintains state without continuous coil power
- Reduced control power consumption and heat generation
- Plug-in, serviceable construction
- Multiple contact configurations
- DIN-rail socket installation
- Mechanical indication on selected models
- Complete socket and accessory system
Typical Applications: Energy management · Industrial control · Memory circuits · Lighting control · Power management · Remote switching

Plug-in sockets provide a secure and serviceable connection between industrial relays and panel wiring. They allow relays to be installed and replaced without disturbing permanent field wiring, simplifying commissioning and maintenance.
Socket families are available for miniature, industrial, interface and latching relays, with screw-terminal and Push-in connection technologies as well as PCB and solder-terminal versions for selected relay families.
Key Features
- 35 mm DIN-rail mounting options
- Screw-terminal and Push-in connection technology
- Fast relay replacement
- Multiple socket configurations
- Compatible retaining clips and marking accessories
- Interconnection bridges for simplified panel wiring
- UL/cUL certified socket families available
Typical Applications: Industrial control panels · Machinery · PLC cabinets · HVAC controls · Power distribution controls · OEM equipment

Complete your relay installation with retaining clips, interconnection bridges, description plates, signaling and protection modules, and other accessories designed for our relay and socket systems.
Matching accessories simplify panel assembly, improve identification and allow common signals or supply connections to be distributed across multiple relay modules.
Relpol's accessory portfolio includes interconnection strips such as the ZG20 series, description plates, retaining clips, spring clips, signaling/protection modules and connection accessories for Push-in sockets.
Available Accessories
- Relay retaining clips
- Interconnection/jumper strips
- Description and marking plates
- Signaling modules
- Coil protection/suppression modules
- Push-in socket connection accessories
- Mounting accessories
For example, ZG20 interconnection strips can bridge common input or output signals and are rated up to 36 A / 250 VAC.