The Siemens 3RH2131-1BM408K is a SIRIUS 3RH2 auxiliary contactor relay featuring 3 Normally Open (3NO) and 1 Normally Closed (1NC) mechanically linked contact elements. Designed in the compact S00 frame size, it is ideal for switching, isolating, and interfacing auxiliary control circuits in industrial automation, motor control, and power distribution applications.
Equipped with a DC control coil and mechanically linked contacts compliant with safety requirements, the relay provides dependable switching performance, high operational reliability, and enhanced safety in control systems. The mechanically linked contact elements ensure that NO and NC contacts cannot be simultaneously closed, making the relay suitable for safety-related applications. It also features screw-type terminals for secure wiring, simple installation, and easy maintenance.
Built to Siemens SIRIUS quality standards, the 3RH2131-1BM408K offers a long mechanical service life, compact dimensions, and excellent switching capability for PLC interfaces, relay logic, machine control panels, OEM equipment, and industrial automation systems.
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Part Number | 3RH2131-1BM408K |
| Product Series | SIRIUS 3RH2 |
| Product Type | Auxiliary Contactor Relay |
| Frame Size | S00 |
| Contact Configuration | 3 NO + 1 NC |
| Contact Type | Mechanically Linked Contact Elements |
| Coil Voltage | DC Coil |
| Connection Type | Screw Terminals |
| Rated Insulation Voltage | 690 V |
| Mechanical Service Life | Up to 30 Million Operations |
| Mounting | DIN Rail or Screw Mounting |
| Application | Auxiliary Control & Switching Circuits |
| Standards | IEC 60947 Series |
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