Siemens SIRIUS 3RT1987-5AP31 Changeover Operating Mechanism for 3RT148 Contactor, 100-240V AC/DC Original Brand New

Overview

The Siemens SIRIUS 3RT1987-5AP31 is a critical accessory designed for the high-performance SIRIUS 3RT148 series of power contactors (specifically models 3RT1485, 3RT1486, and 3RT1487). This component functions as the Changeover Operating Mechanism (or magnet coil), providing the necessary power to switch the main contacts of the high-current contactor. It features a versatile wide-range control voltage suitable for both AC and DC industrial power systems, simplifying stock-keeping and installation.

Key Technical Specifications

• Product Type: Changeover Operating Mechanism / Magnet Coil

• Series Compatibility: SIRIUS 3RT148 Contactor (3RT1485, 3RT1486, 3RT1487)

• Control Voltage Range (AC): 100 V to 240 V AC (50/60 Hz)

• Control Voltage Range (DC): 100 V to 220 V DC

• Operation Type: AC (50/60 Hz) / DC Operation

• Brand: Siemens SIRIUS

Benefit

• Universal Voltage Range – Works with 100–240 V AC and 100–220 V DC for maximum flexibility

• Reliable Switching – Smooth and consistent changeover mechanism ensures operational safety

• Compatible with Siemens 3RT1485/86/87 Contactors – Designed specifically for seamless integration

• Durable Construction – Built for industrial environments and intensive operational cycles

• Easy Installation – Simple mounting and wiring reduce installation time and maintenance costs

Function

The Siemens 3RT1987-5AP31 serves as a changeover operating mechanism that enables controlled switching between two operational states in conjunction with Siemens 3RT series contactors. This function is essential in applications requiring:

• Load transfer

• Motor control switching

• Operational redundancy systems

• Industrial automation controls

The device ensures secure and precise switching, supporting both AC and DC operational modes.

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