The Siemens 3RH2140-1BB408K is a genuine SIRIUS 3RH2 auxiliary contactor relay featuring 4 Normally Open (4NO) mechanically linked contact elements in a compact S00 frame size. Designed for reliable auxiliary switching, signal interfacing, and control applications, it is ideal for industrial automation, machine building, motor control centers (MCCs), PLC systems, and power distribution panels.
Equipped with a 24V DC control coil and screw terminal connections, the relay ensures secure wiring, quick installation, and dependable operation. The mechanically linked contact elements enhance operational safety by ensuring reliable contact switching, making the relay suitable for safety-related control and interlocking circuits. Its compact design, high switching capacity, and long mechanical service life make it an excellent choice for demanding industrial environments.
Manufactured to Siemens' high-quality standards, the 3RH2140-1BB408K delivers consistent performance, long-term durability, and easy integration into industrial control systems.
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Part Number | 3RH2140-1BB408K |
| Product Series | SIRIUS 3RH2 |
| Product Type | Auxiliary Contactor Relay |
| Frame Size | S00 |
| Contact Configuration | 4 Normally Open (4NO) |
| Contact Type | Mechanically Linked Contact Elements |
| Coil Type | DC Coil |
| Coil Voltage | 24V DC |
| Connection Type | Screw Terminals |
| Mounting | DIN Rail or Screw Mount |
| Rated Insulation Voltage | 690 V |
| Surge Withstand Voltage | 6 kV |
| Degree of Protection | IP20 (Front) |
| Mechanical Service Life | Up to 30 Million Operating Cycles |
| Application | Auxiliary Switching, PLC Interface & Control Circuits |
| Standard | IEC 60947 Series |
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