3RT20373XF400LA2

Siemens 3RT2037-3XF40-0LA2 rail traction contactor, S2, 3 poles, AC-3 rated 65A, 30kW (400V), electronic drive coil 110VDC, operating range 0.7-1.25 times the rated value, with 1NO+1NC auxiliary contacts.

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Siemens 3RT2037-3XF40-0LA2 Traction Contactor S2/110VDC

Product Positioning

The Siemens 3RT2037-3XF40-0LA2 is a contactor for track traction in the SIRIUS 3RT2 series. It is an S2 size, 3-pole design, with an AC-3 rated current of 65A and a power output of 30kW (400V). It shares the main circuit and coil specifications with the 2NO+2NC version in the same series. The Siemens 3RT2037-3XF40-0LA2 coil is 110VDC electronically driven, with an operating voltage range of 0.7 to 1.25 times the rated value. Equipped with 1NO+1NC auxiliary contacts, it is suitable for track vehicle control circuits with relatively simple auxiliary feedback requirements.

Core Product Advantages and Features

Special design for rail traction

S2 size, 3 poles, AC-3 rated current 65A, 30kW (400V).

110VDC electronic drive coil

Operating voltage range 0.7-1.25 times rated value, with built-in surge suppression varistor.

1NO+1NC auxiliary contact

A single normally open and normally closed configuration is suitable for simple interlocking feedback requirements.

Hybrid terminal design

Main circuit screw terminals, control and auxiliary circuit spring terminals.

project	Specification
Rated current (AC-3)	65A
Rated power (AC-3)	30kW (400V)
Extreme number	3 poles
Control/coil voltage	110VDC, operating range 0.7-1.25×Us (electronically driven, built-in varistor)
Auxiliary contact configuration	1NO+1NC
Main circuit terminals	Screw terminals
Control/Auxiliary Terminals	Spring terminals
Applicable series/sizes	SIRIUS 3RT2, Size S2
Product Type	Traction Contactor

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