Siemens 3RT2934-5AG21 Magnetic Coil 110 V AC, 50/60 Hz for SIRIUS 3RT2 Size S2 Contactors Original Brand New

Overview

The Siemens 3RT2934-5AG21 is a high-quality magnetic coil designed for use with the SIRIUS 3RT2 series contactors (size S2). It operates at 110 V AC and supports both 50 Hz and 60 Hz frequencies. As a genuine Siemens spare part, it ensures reliable performance and perfect compatibility with your control system.

Features & Specifications

• Rated control supply voltage: 110 V AC at 50 Hz and 60 Hz.

• For use with Siemens SIRIUS size S2 contactors (e.g., 3RT20 3.–, 3RT23 3.–, 3RT25 3.–).

• Designed for AC operation (not DC).

• Origin: Germany manufacturing, meets RoHS & REACH requirements.

• Net weight approx 0.112 kg.

Benefit

• Guaranteed compatibility: This coil is specified for use with Siemens SIRIUS 3RT2 series contactors in size S2, so installation is simple and hassle-free.

• Reliable switching performance: With proper coil voltage and frequency rating, the coil ensures that your contactor actuates correctly and consistently.

• Global voltage/frequency support: 50 Hz and 60 Hz capability means you can deploy this part in many international installations without worrying about mismatches.

• Genuine part quality: Since this is a genuine Siemens component, you get the manufacturer’s build quality, certification, and support—leading to less downtime and better long-term reliability.

Function & Application

The 3RT2934-5AG21 coil sits inside the contactor assembly of the SIRIUS 3RT2 range. When a 110 V AC control voltage is applied, the coil generates a magnetic field which actuates the armature. This closes (or opens) the main power contacts of the contactor, allowing current to flow to the load (such as a motor or other high-power device). Typical applications include:

• Motor Control Centres (MCCs)

• Industrial automation systems

• HVAC pump/motor control

• Any setup using SIRIUS 3RT2 size S2 contactors requiring a 110 V AC coil

Installation Notes & Tips

• Confirm that your contactor is indeed a SIRIUS 3RT2 size S2 model.

• Ensure the supply voltage to the coil is stable at 110 V AC, and frequency is either 50 Hz or 60 Hz.

• Disconnect power before replacing the coil to avoid risk of electric shock or equipment damage.

• When replacing a coil, inspect the contactor for wear and check the armature / spring mechanism. A new coil will maximise reliability only when the supporting parts are in good condition.

• Keep documentation (datasheet) for future reference; for example, Siemens lists this coil as “Magnet coil for contactors S2, 110 V AC, 50/60 Hz”.

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