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The Siemens SIRIUS 3TH4 series is a contactor relay for switching the control signals in the control circuit。It has operating voltage of 42 V AC。The contactor relays have standard-compliant terminal designations and a reliable connection technology。The type of electrical connection for auxiliary and control current circuit is through screw terminal。Due to multiplication of outputs， simultaneous switching of up to 10 auxiliary circuits is possible。The contacts are designed with positively driven operation for safety applications as well as SUVA versions。The devices are climate-resistant and have a high contact reliability。It is approved for worldwide use e.g。IEC and UL/CSA.Protection class IP is IP20 Ambient operating temperature is -25 to +55℃

The Siemens SIRIUS 3TH4 series is a contactor relay for switching the control signals in the control circuit。It has operating voltage of 220 to 264 V AC。The contactor relays have standard-compliant terminal designations and a reliable connection technology。The type of electrical connection for auxiliary and control current circuit is through screw terminal。Due to multiplication of outputs， simultaneous switching of up to 10 auxiliary circuits is possible。The contacts are designed with positively driven operation for safety applications as well as SUVA versions。The devices are climate-resistant and have a high contact reliability。It is approved for worldwide use e.g。IEC and UL/CSA.Protection class IP is IP20 Ambient operating temperature is -25 to +55℃

The Siemens SIRIUS 3RH2 series is a contactor relay used for switching the control signals in the control circuit。The operating voltage is 24 V DC。The design of the surge suppressor is integrated with varistor。It has a size S00。The type of electrical connection for auxiliary contact is through spring 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

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 from 72 to 125 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