Siemens 3RT5956-1CD00 SIRIUS RC Element Surge Suppressor 127-240V AC/DC Original Brand New

Overview

The 3RT5956-1CD00 is a high-performance RC element (Resistor-Capacitor) protective circuit accessory for the Siemens SIRIUS line of power contactors. It is specifically engineered to clip and dampen the extreme voltage transients (inductive voltage spikes) that are generated when a contactor’s coil is de-energized. This component is crucial for maintaining system reliability, particularly in circuits where microprocessors, PLCs, or other sensitive electronics are connected parallel to the contactor’s coil.

It features easy, direct mounting to the front of the contactor, ensuring simple integration into your control circuit without complex wiring modifications.

Key Benefit

• Reliable Surge Protection: Safeguards electrical devices from unexpected voltage spikes.

• Enhanced Equipment Lifespan: Reduces wear and tear on relays, contactors, and other sensitive components.

• Compact & Durable Design: Easy to integrate into various electrical panels without compromising space.

• EMI Reduction: Minimizes electromagnetic disturbances for smoother operation of industrial machinery.

• Siemens Quality: Manufactured to rigorous quality standards for dependable industrial performance.

Function / Features

The RC element operates as a passive filter. When the contactor coil is de-energized, the collapsing magnetic field induces a high reverse voltage spike (back-EMF). The Resistor (R) and Capacitor (C) network in the 3RT5956-1CD00 is connected in parallel with the coil to absorb this energy.

The capacitor temporarily stores the energy, and the resistor limits the discharge current, effectively rounding off the sharp voltage peak and reducing its magnitude to safe levels, thereby preventing component stress and electronic noise.

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