Siemens 3RT2028‑1FB40 SIRIUS Power Contactor is a robust solution for industrial motor switching applications:
Electrical ratings:
3‑pole AC‑3e / AC‑3 contactor, nominal current 38 A (400 V)
Power handling up to 18.5 kW at 400 V
Coil & control:
24 V DC coil with integrated diode assembly for reliable coil suppression
Auxiliary contacts: 1 NO + 1 NC via screw terminals
Design & durability:
Compact S0 housing, snap-on DIN‑rail mounting, IP20 protection
Mechanical durability: \~10 million switching cycles; able to withstand shocks and surges
Performance & compliance:
Insulation voltage rated to 690 V, surge resistance of 6 kV
Operates in ambient temps from –25 °C to +60 °C, with 5.9 W coil power draw
Use cases:
Ideal for starting and stopping motors in standard industrial setups, especially where compact modules with strong performance and integrated suppression are needed.