The Siemens SIRIUS 3RH2 series is a coupling contactor relay used in railway for switching the control signals in the control circuit. The operating voltage is 24 V DC. The design of surge suppressor is integrated with varistor. It has a size S00. The type of electrical connection for auxiliary contact is through spring-type terminal. The contactor relays have standard-compliant terminal designations and a reliable and time-saving connection technology. Due to the multiplication of outputs, simultaneous switching of several auxiliary circuits is possible and all contacts are available with positively driven operation for safety applications. The contactor relays are climate-resistant and have high contact reliability. It is approved for worldwide use e.g. IEC and UL/CSA.

Operating frequency is 50 to 60 Hz
Protection class IP is IP20