Siemens 3RT2934-5NB31 Magnetic Coil 20-33 V AC/DC, 50/60 Hz, Integrated Varistor Original Brand New

Overview

The Siemens 3RT2934-5NB31 is a high-quality magnetic coil designed for use with the SIRIUS S2 size contactor series (3RT2.3-.N). It operates at a control supply voltage of 20-33 V (AC/DC), at both 50 Hz and 60 Hz frequencies, and features an integrated varistor for superior surge protection.

Key Benefits

• Low‐voltage flexibility: Works on 20-33 V AC/DC range, supplying both 50 Hz & 60 Hz environments.

• Integrated varistor protection: Built-in surge suppression helps prolong coil and contactor life by protecting from voltage spikes.

• High compatibility: Specifically engineered to fit SIRIUS S2 size contactors (3RT2.3-.N) — ensuring seamless integration.

• Brand confidence: Made by Siemens, a globally trusted manufacturer of industrial automation components.

• Simplified inventory: One coil serving AC & DC applications (within 20-33 V) means fewer variants and easier stocking.

Functionality & Specifications

• Control supply voltage (Us): 20-33 V AC/DC.

• Rated voltage at AC 50 Hz / 60 Hz / DC: up to 33 V.

• Voltage type for actuation: AC/DC.

• Usage environment: For contactors in motor control, industrial automation, switchgear where reliable coil actuation and surge suppression are crucial.

• Form factor & series: SIRIUS S2 size coil, part of Siemens’ modular system for contactors.

Application

• Motor control centres (MCCs) – for starting, stopping motors reliably with low-voltage control circuits.

• Industrial automation panels – when the control circuit uses 20-33 V AC/DC and demands surge suppression for reliability.

• Building management / HVAC systems – in contactor circuits where safety and longevity matter.

• OEMs or retrofits – when replacing a coil in a 3RT2.3 size contactor and wanting the genuine Siemens variant.

For more of our products, including a full range of Siemens SIRIUS contactors and accessories, visit Turll today!