3RT20371NB343MA0

The Siemens 3RT2037-1NB34-3MA0 contactor, part of the SIRIUS 3RT2 series, is an S2/3-pole contactor with an AC-3 rated capacity of 65A and 30kW (400V). It features a 20-33VAC/DC coil with built-in surge suppression, 2NO+2NC contacts, and weighs approximately 1.2kg.

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Siemens 3RT2037-1NB34-3MA0 Contactor 20-33VAC/DC

Product Positioning

The Siemens 3RT2037-1NB34-3MA0 contactor is a SIRIUS 3RT2 series S2 size, 3-pole design, AC-3 rated current 65A, 30kW (400V). The Siemens 3RT2037-1NB34-3MA0 uses a 20-33VAC/DC wide voltage range coil and has a built-in surge suppressor varistor. It can be directly driven by a PLC output module without an additional relay. It is equipped with 2NO+2NC auxiliary contacts for convenient circuit interlocking and status feedback.

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 varistor surge suppression, can be directly driven by PLC output module.

2NO+2NC auxiliary contacts

The dual-group normally open and normally closed configuration is suitable for applications requiring dual-loop monitoring and feedback.

Low-energy electronic coil

Weighing approximately 1.2kg, it is suitable for simplified wiring within automated control panels.

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	2NO+2NC
weight	Approximately 1.2kg
Applicable series/sizes	SIRIUS 3RT2, Size S2
Applicable occasions	It can be directly driven by the PLC output module, without the need for a relay.

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