Siemens SIRIUS 3RT1956-1CD00 Surge Suppressor, RC Element for 3RT1 Contactors, 127-240V AC/150-250V DC, Screw Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT1956-1CD00 is a high-quality, plug-in Surge Suppressor utilizing an RC (Resistor-Capacitor) element designed to protect the coil of Siemens SIRIUS 3RT1 power contactors (Sizes S6, S10, and S12) from damaging voltage spikes. By suppressing the inductive voltage peaks that occur when the contactor coil is switched off, this RC element ensures the longevity and reliability of your industrial control system components. Featuring a robust design with screw terminals, it offers versatile compatibility with wide AC and DC control voltage ranges.

Benefits & Advantages

• Extended Contactor Lifespan: Effectively dampens high-energy voltage surges (switching peaks) that degrade insulation and components, significantly extending the operational life of the contactor and associated control circuitry.
• Enhanced System Reliability: Minimizes electrical noise and interference (EMC), reducing the risk of malfunctions or false tripping in sensitive electronic control systems like PLCs and microcontrollers.
• Wide Voltage Range: Compatible with a broad spectrum of standard industrial control voltages ($127-240\text{V AC}$ and $150-250\text{V DC}$), offering flexible application.
• Easy Plug-in Installation: Designed for tool-free, direct mounting onto the large 3RT1 contactor coil terminals, ensuring quick and secure integration.
• Global Standard Compliance: Certified with CE, UL, and CSA, guaranteeing quality and suitability for international use in various industrial applications.

Function & Operation

The 3RT1956-1CD00 functions as an $RC$ element, which is a passive electrical circuit consisting of a resistor and a capacitor wired in series. When the contactor coil is de-energized, the collapsing magnetic field generates a high-voltage inductive spike. The $RC$ suppressor provides a low-impedance path to harmlessly dissipate this energy, preventing the voltage from exceeding the maximum rating of the coil and other sensitive components in the control circuit. This crucial function maintains the integrity of the contactor’s control mechanism and prevents premature failure.

Application

This surge suppressor is an essential accessory for:

• Industrial Motor Control Centers (MCCs)
• Automated Machinery and Equipment
• HVAC and Pumping Systems
• Control Panels requiring protection for Siemens SIRIUS 3RT1 Power Contactors in sizes S6, S10, and S12 operating on the specified AC/DC voltages.

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