3RT2037-3NB30

The Siemens 3RT2037-3NB30 contactor, part of the SIRIUS 3RT2 series, is a 2- or 3-pole contactor with AC-3 rated capacity of 65A and 30kW (400V). It features a 20-33VAC/DC coil with built-in surge suppression, 1NO+1NC contacts, and spring terminals for the control circuit.

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Siemens 3RT2037-3NB30 contactor 20-33VAC/DC spring terminal

Product Positioning

The Siemens 3RT2037-3NB30 contactor is a SIRIUS 3RT2 series S2 size, 3-pole design, AC-3 rated current 65A, 30kW (400V), and its main circuit specifications are the same as the screw version in the same series. The Siemens 3RT2037-3NB30 coil voltage is 20-33VAC/DC and has a built-in surge suppressor. It is equipped with 1 NO + 1 NC auxiliary contacts. The main circuit uses screw terminals, while the control and auxiliary circuits use spring terminals, improving field wiring efficiency.

Core Product Advantages and Features

S2 size 3-pole main contactor

The AC-3 has a rated current of 65A and a power of 30kW (400V), and shares the main circuit with the 3RT2037 series.

20-33VAC/DC wide voltage coil

Built-in surge suppressor varistor, compatible with various control voltage sources.

1NO+1NC auxiliary contact

Provides basic interlocking and operational status feedback signals.

Spring terminal control circuit

The main circuit uses screw terminals, and the control auxiliary circuit uses spring terminals, making wiring quick and time-saving.

project	Specification
Rated current (AC-3)	65A
Rated power	30kW (400V)
Extreme number	3 poles
Control/coil voltage	20-33VAC/DC (built-in surge suppression varistor)
Auxiliary contact configuration	1NO+1NC
Main circuit terminals	Screw terminals
Control/Auxiliary Terminals	Spring terminals
weight	Approximately 1.13 kg
Applicable series/sizes	SIRIUS 3RT2, Size S2

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