3RH2140-1BB40

Siemens presents the 3RH2140-1BB40 auxiliary contactor, ideal for controlling circuits in various systems. This compact contactor falls under size S00, ensuring adaptability for limited spaces in electrical panels. The device operates with a control voltage of 24 VDC while managing an insulation voltage up to 690 V. A significant feature is its capacity to withstand environmental factors, categorized with a degree of pollution of 300%, making it resilient in challenging conditions.

With a power loss of 4 watts, the auxiliary contactor maintains efficiency during operation. In terms of protective features, the surge voltage resistance reaches 6 kV, providing added safety during transient conditions. The shock resistance ratings are substantial, offering protection at 10g for 5 milliseconds and 5g for 10 milliseconds, ensuring operational reliability under mechanical stress.

Weighing 0.271 kg, the 3RH2140-1BB40 is lightweight yet robust. It is designed for high operational frequency, capable of achieving a no-load switching frequency of 10,000 cycles per hour. This feature supports its use in applications requiring frequent switching.

Another noteworthy aspect is the contactor's closing power, rated at 4 W, which determines the effectiveness of its magnetic action. Closing delays vary within a range of 30 to 100 milliseconds, allowing for customizable response times in control applications.

The contactor is equipped with four normally open contacts, facilitating multiple control points in a circuit. This device is easily mounted using a screw and snap-on method, accommodating standard 35 mm DIN rails for straightforward installation.