3RT2028-1NB30

Siemens 3RT2028-1NB30 Standard Contactor Size S0 3-pole AC/DC 21-28V
Siemens 3RT2028-1NB30 Standard Contactor Size S0 3-pole AC/DC 21-28V

Siemens 3RT2028-1NB30 standard contactor, 3 poles, AC-3 rated current 38A, 18.5kW (400V), control voltage AC/DC 21-28V, equipped with 1NO+1NC auxiliary contacts, screw terminals, rated insulation voltage 690V.

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Siemens 3RT2028-1NB30 Standard Contactor Size S0 3-pole AC/DC 21-28V
Product Positioning

The Siemens 3RT2028-1NB30 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 features a low-voltage, wide-range design for AC/DC 21-28V, closely matching the actual voltage range of a 24V control circuit. It has an IP20 protection rating for its housing and terminals and is certified by multiple countries including UL, CSA, EAC, and CCC.

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.
AC/DC 21-28V low voltage coil
It closely approximates the actual operating voltage of the 24V control circuit, ensuring stable operation and reducing the likelihood of false tripping.
IP20 protection, multi-national certification
The enclosure and terminals are IP20 protected and have obtained UL, CSA, EAC, and CCC certifications.
1NO+1NC auxiliary contact
The feedback of the main contact's action status facilitates the integration of interlocking protection and monitoring.
project Specification
Applicable series/Size SIRIUS 3RT20 series, Size S0
Extreme number 3 poles
Rated current (AC-3) 38A
Rated power (400V) 18.5kW
Control/coil voltage AC/DC 21-28V
Auxiliary contact configuration 1NO+1NC
Terminal type screw type
Rated insulation voltage 690V
Applicable temperature range -25°C ~ 60°C
Installation method Rail quick-release/panel mounting
Protection level IP20 (Housing and Terminals)
External dimensions 45mm wide × 107mm deep × 85mm high
Certification UL, CSA, EAC, CCC

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