3RT2028-1BB44
Siemens 3RT2028-1BB44 standard contactor, 3-pole, AC-3 rated current 38A, 18.5kW (400V), control voltage DC 24V, with 2NO+2NC auxiliary contacts, screw terminals, rated insulation voltage 690V.
Product Positioning
The Siemens 3RT2028-1BB44 is a size S0, 3-pole standard contactor from the SIRIUS 3RT20 series. It has an AC-3 rated current of 38A and a rated current of 18.5kW (400V), suitable for direct starting and circuit switching of general motors. This model has a DC 24V coil and is equipped with 4 auxiliary contacts (2NO+2NC), providing more interlocking points than the standard 1NO+1NC, making it suitable for control panel designs requiring numerous feedback or interlocking circuits.
Core Product Advantages and Features
Size S0, 3-pole main circuit
AC-3 rated current 38A, 18.5kW (400V), suitable for direct start and stop of general motors.
2NO+2NC auxiliary contacts
It has one more contact point than the standard 1NO+1NC, which can simultaneously meet the needs of feedback and interlocking.
DC 24V coil
Suitable for direct drive with PLC output or DC control power supply.
Detachable auxiliary contact base, screw terminal
Maintenance and replacement are convenient, and the wiring installation is in line with existing distribution box practices.
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3RT2028-1BF40
Siemens 3RT2028-1BF40 standard contactor, 3-pole, AC-3 rated current 38A, 18.5kW (400V), control voltage DC 110V, with 1NO+1NC auxiliary contacts, screw terminals, rated insulation voltage 690V.
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3RT2028-1BB40
Siemens 3RT2028-1BB40 standard contactor, 3-pole, AC-3 rated current 38A, 18.5kW (400V), control voltage DC 24V, with 1NO+1NC auxiliary contacts, screw terminals, rated insulation voltage 690V.
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3RT2028-1AP00
Siemens 3RT2028-1AP00 standard AC contactor, Size S0, 3 poles, AC-3 rated current 38A, 18.5kW (400V), control voltage 230VAC 50Hz, with 1NO+1NC auxiliary contacts.