3RT2028-2BB40

Siemens 3RT2028-2BB40 Standard Contactor, Size S0, 3-pole, DC 24V
Siemens 3RT2028-2BB40 Standard Contactor, Size S0, 3-pole, DC 24V

Siemens 3RT2028-2BB40 standard contactor, 3-pole, AC-3 rated current 38A, 18.5kW (400V), control voltage DC 24V, with 1NO+1NC auxiliary contacts, spring terminals, rated insulation voltage 690V.

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Siemens 3RT2028-2BB40 Standard Contactor, Size S0, 3-pole, DC 24V
Product Positioning

The Siemens 3RT2028-2BB40 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, making it suitable for direct driving with PLC outputs or DC control circuits. It uses spring-loaded terminals with 1NO+1NC auxiliary contacts, resulting in excellent installation and maintenance efficiency.

Core Product Advantages and Features
Size S0, 3-pole main circuit
The AC-3 has a rated current of 38A and a power output of 18.5kW (400V), and can be used for direct start-stop of general motors.
DC 24V coil
Suitable for direct drive with PLC output or DC control power supply, reducing the need for relay stations.
Spring-type terminals
Screwless fastening and quick wiring reduce downtime during maintenance.
1NO+1NC auxiliary contact
The feedback of the main contact's action status facilitates the integration of interlocking protection and monitoring systems.
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 DC 24V
Auxiliary contact configuration 1NO+1NC
Terminal type Cage Clamp
Rated insulation voltage 690V
Applicable temperature range -25°C ~ 60°C
Installation method Rail quick-release/panel mounting
weight Approximately 643g

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