3RT1955-5AF31

The 3RT1955-5AF31 is a removable coil operating mechanism for the S6 frame 3RT105/3RT145 contactor. It is rated for 110-127V AC/DC universal, entered mass production in 2019, and complies with RoHS environmental directives.

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Siemens 3RT1955-5AF31 Contactor with Removable Coil Operating Mechanism 110-127V AC/DC

Product Positioning

The 3RT1955-5AF31 is a replaceable coil operating mechanism specifically designed for Siemens SIRIUS large power contactors 3RT105 and 3RT145 (S6 frame). Originally positioned as a "Withdrawable Drive" replacement drive coil, it is intended for maintenance and replacement rather than the sale of the entire contactor. Rated voltage is 110-127V, supporting both AC 50/60Hz and DC operation. It uses screw terminal wiring, allowing maintenance personnel to simply remove the old coil module and install this product for replacement, eliminating the need to replace the entire contactor and effectively reducing spare parts costs and maintenance time. This model has been continuously supplied since its mass production began in September 2019 and complies with RoHS environmental directives.

Core Product Advantages and Features

110-127V AC/DC universal

Rated voltage covers 110-127V, and it supports AC 50/60Hz and DC operation, making it suitable for use in 110V power grid environments such as North America.

Replaceable coil design

The coil is modularly designed, allowing for individual replacement in case of failure, eliminating the need to replace the entire S6 frame large contactor body.

Screw terminal wiring

The wiring uses screw terminals, ensuring a secure and reliable connection, making it suitable for industrial distribution box environments that operate for extended periods.

Long-term mass production and supply

Since its introduction in 2019, it has been in continuous mass production with stable supply, making it suitable for long-term inventory maintenance planning.

project	Specification
Product Type	Replaceable coil operating mechanism for contactors (incomplete contactor)
Applicable contactors	SIRIUS 3RT105 and 3RT145 series (S6 frame)
Rated operating voltage	AC 110-127V(50/60Hz)/DC 110-127V
Terminal type	Screw terminals
Product Lifecycle	Mass production in progress
Import time	September 25, 2019
Environmental compliance	RoHS compliant
brand	Siemens SIRIUS
Applicable product lines	3RA19, 3RH19, 3RT19 series low-voltage control and distribution accessories

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3RT1955-5AF31-WH

The 3RT1955-5AF31-WH basic model is an S6 frame contactor with a removable coil operating mechanism, suitable for AC/DC operation from 110-127V. The meaning of the "-WH" suffix is currently unconfirmed; it is recommended to contact Kenxin Motor for verification.

3RT1955-5AD31

The 3RT1955-5AD31 is an AC drive device (coil operating mechanism) used in S6 frame 3RT105/3RT145 contactors. It operates on 42-48V AC/DC and features a standard power-saving circuit and screw terminal design.

3RT1955-5AB31-WH

The basic model 3RT1955-5AB31-WH is an S6 frame contactor with a 24V coil operating mechanism. The meaning of the "-WH" suffix is currently unconfirmed; for details, it is recommended to contact Kenxin Motor for verification.