Siemens 3RT2944-5NB31 SIRIUS Magnet Coil 20-33V AC/DC with Varistor for 3RT2.4 Contactor, S3 Size Original Brand New

Overview

The Siemens 3RT2944-5NB31 is a genuine SIRIUS high-performance magnet coil designed as an essential spare part or component for the Siemens 3RT2.4 series of power contactors (specifically, the Size S3 frame). This coil is engineered for maximum reliability and flexibility, operating on a wide voltage range of 20-33 V AC/DC at both $50/60\text{ Hz}$.

A crucial feature is the integrated varistor surge suppression, which provides superior protection for the coil and control circuitry, ensuring long-term operational stability in demanding industrial environments.

Key Features & Function

• Product Number: 3RT2944-5NB31 (Siemens SIRIUS)
• Application: Spare or replacement magnet coil for Siemens 3RT2.4 series power contactors (Size S3).
• Control Supply Voltage: Flexible 20-33 V AC/DC (50/60 Hz) for universal application in AC or DC control circuits.
• Integrated Varistor: Built-in surge suppressor protects the coil and sensitive control components from damaging voltage peaks and surges, extending service life.
• AC/DC Operation: Eliminates the need for separate AC and DC coils, simplifying inventory and selection.
• High Performance: Delivers the consistent electromagnetic force required for fast, reliable, and noise-dampened actuation of the contactor.
• Quality & Compatibility: A genuine Siemens SIRIUS component ensuring perfect fit, functionality, and compliance with industrial standards.

Benefit

• Enhanced System Reliability: The integrated varistor significantly reduces the risk of coil failure and associated downtime caused by electrical surges.
• Versatile Application: The wide-range AC/DC voltage capability provides flexibility for use across diverse control system designs and international power standards.
• Cost-Effective Maintenance: Its robust design and surge protection feature contribute to a longer lifespan, reducing the frequency and expense of replacement.
• Simplified Stocking: One coil covers a wide range of common control voltages (20 V to 33 V), simplifying spare parts management.
• Guaranteed Performance: As a genuine Siemens component, you are assured of high quality, consistency, and optimal performance with your 3RT2.4 contactor.

Technical Specification

• Brand: SIRIUS
• Product Type Designation: 3RT29
• Contactor Size Compatibility: S3
• Voltage Range: 20-33 V
• Frequency: 50/60 Hz
• Surge Suppression: Integrated Varistor
• Weight (Approx): 0.292 kg

Application

Ideal for maintenance, repair, and operations (MRO) or new panel building in systems utilizing Siemens 3RT2.4 contactors for applications such as:

• Motor Control Circuits
• Industrial Automation Machinery
• HVAC and Pump Control Systems
• Lighting and Heating Control Panels
• Any system requiring reliable, surge-protected control of the Size S3 contactor.

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