CONTROL RELAY – 3RH2131-1BB40

Overview

The Control Relay – 3RH2131-1BB40 from Siemens’ SIRIUS Innovation range provides reliable overload protection and surge damping for electric motors. Designed for solid-state circuits, it supports currents above 1mA at voltages exceeding 17V. This relay plugs easily onto compatible contactor relays, effectively suppressing opening surges and ensuring safe motor starts.

Performance & Reliability

Engineered for tough industrial environments, this four-pole control relay operates in temperatures ranging from -25°C to +60°C. Its robust design prevents coil and winding damage, extending motor life. The 24V DC coil voltage helps resist drops caused by high inrush currents, maintaining stable control performance.

Installation & Connectivity

Screw terminals provide secure connections, enabling fast and reliable wiring. The IP20 rating protects against accidental contact and dust or objects larger than 12 mm. Its compact profile allows integration into standard control panels without occupying unnecessary space.

Applications

The 3RH2131-1BB40 control relay is ideal for industrial automation, manufacturing, and motor-driven systems requiring effective surge suppression. Use it in combination with Siemens SIRIUS contactors to safeguard equipment against operational stress.

Technical Highlights

• Four-pole design for effective surge damping

• Operating temperature: -25°C to +60°C

• 24V DC coil voltage for inrush resistance

• IP20 rating for touch protection and dust resistance

• Easy plug-on installation with solid screw terminals

Conclusion

For industrial operators seeking dependable motor protection, the Control Relay – 3RH2131-1BB40 ensures efficient operation and reduced downtime. Noordvyk Industries supplies this relay along with a full range of Siemens SIRIUS components, positioning itself as your reliable industrial spare parts partner