3RT20373XF440LA2

Siemens 3RT2037-3XF44-0LA2 rail traction contactor, S2, 3 poles, AC-3 rated 65A, 30kW (400V), 110VDC electronic drive coil, range 0.7-1.25 times the rated value, with 2NO+2NC contacts, weighing approximately 1.21kg.

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Siemens 3RT2037-3XF44-0LA2 Traction Contactor S2/110VDC

Product Positioning

The Siemens 3RT2037-3XF44-0LA2 is a dedicated contactor for rail traction in the SIRIUS 3RT2 series. It features an S2 size, a 3-pole design, and a rated current of 65A (30kW, 400V) for AC-3. It can also handle AC-1 currents of 80A and AC-4 currents of 55A. The Siemens 3RT2037-3XF44-0LA2 uses an electronically driven 110VDC coil with a built-in surge suppressor. Its operating voltage range is 0.7 to 1.25 times the rated value. It is equipped with 2NO+2NC auxiliary contacts, and the detachable auxiliary contact module facilitates maintenance. It is suitable for rail vehicle control systems.

Core Product Advantages and Features

Special design for rail traction

S2 size, 3 poles, AC-3 rated current 65A, 30kW (400V), also available with AC-1 80A/AC-4 55A capacity.

110VDC electronic drive coil

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

2NO+2NC auxiliary contacts

The detachable auxiliary contact module facilitates on-site maintenance and replacement.

Hybrid terminal design

The main circuit screw terminals and control and auxiliary circuit spring terminals weigh approximately 1.21 kg.

project	Specification
Rated current (AC-3)	65A
Rated power (AC-3)	30kW (400V)
Rated current (AC-1)	80A (400V)
Rated current (AC-4)	55A (400V)
Extreme number	3 poles
Control/coil voltage	110VDC, operating range 0.7-1.25×Us (electronically driven, built-in varistor)
Auxiliary contact configuration	2NO+2NC (Detachable Module)
Main circuit terminals	Screw terminals
Control/Auxiliary Terminals	Spring terminals
weight	Approximately 1.21 kg
Applicable series/sizes	SIRIUS 3RT2, Size S2
Product Type	Traction Contactor

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