3RT1975-5AP31

The 3RT1975-5AP31 is a 220-240V AC/DC replaceable coil suitable for S12 base large contactors. It weighs approximately 1.225kg, has screw terminal wiring, and is suitable for common control voltages in Taiwan.

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Product Introduction

Product Positioning

3RT1975-5AP31 is a replaceable operating coil for the Siemens SIRIUS large contactor S12 frame series (corresponding to 3RT107, 3RT127, and 3RT147). It has a rated voltage of 220-240V, covering Taiwan's single-phase 220V and most internationally accepted control voltage ranges. It can be driven by 50Hz or 60Hz AC power or a corresponding DC power supply. When the equipment's control voltage falls within this range and the original coil has aged and failed, this part number can be directly replaced, avoiding the high cost and downtime of replacing the entire large contactor.

Core Product Advantages and Features

220-240V universal voltage

It covers single-phase voltages in Taiwan and most overseas control voltages, and is compatible with both 50/60Hz dual frequencies, offering high flexibility in selection.

Compatible with SIRIUS S12 base

It is a shared spare part for large contactors such as 3RT107, 3RT127, and 3RT147.

Weight and shape are clearly defined

Each piece weighs approximately 1.225kg, and the packaging dimensions are approximately 110x125x172mm, facilitating material preparation planning and inventory management.

Replaceable coil structure

In case of fault or change in voltage requirements, the coil can be replaced individually without disassembling the entire contactor mechanism.

project	Specification
Product Type	Replaceable coil (switching operating mechanism), incomplete contactor
Rated control voltage	220-240V
Applicable frequency	50Hz/60Hz (AC), corresponding DC
Applicable contactor base	S12
Applicable models	3RT107, 3RT127, 3RT147 series
Wiring method	Screw terminals
weight	Approximately 1.225 kg
Packaging dimensions	Approximately 110 x 125 x 172mm
Place of origin	Germany
brand	Siemens