Siemens Power contactor, 24 V DC 3-pole, Size S0


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The compact Siemens power contactor is typically used to control motors, plants and to turn on electrical heating systems. The 3RT2028-1BB40 is ideal for the performance range up to 18.5 kW at AC-3/400 V. The SIRIUS power contactor uses a control supply voltage of 24 V AC and features one NC and one contact as auxiliary contact as well as a useful screw-type connection. In size S0, the power contactor is a great solution for all load feeders with the circuit breakers 3RV2011 and 3RV2311.



Design: Main contactor

Auxiliary contacts: 1 x NO/NC

Size: S0

Electrical data

Service power at AC-3/400 V: 18.5 kW

Insulation voltage: 690 V

Control supply voltage: 24 V AC

Impulse voltage resistance: 6 kV

Mechanical data

Frequency of operation at AC-3: 750 1/h

Dimensions (H x W x D): 45 x 85 x 107 mm

Main connection: Screw-type terminals

Aux connection: Screw-type terminals

Ambient conditions

Ambient temperature: -25 °C to 50 °C

Protection rating: IP20

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