Siemens SIRIUS 3RT2017-2WB42 Power Contactor 12A, 5.5kW, 24V DC Coil, 1 NC, Spring Terminal, Size S00 Original Brand New

Overview

The Siemens 3RT2017-2WB42 is a high-performance SIRIUS 3RT20 series power contactor designed for reliable switching of motors and other electrical loads in industrial control applications. As a core component of the SIRIUS modular system, it offers a compact design (Frame Size S00) combined with high power ratings, making it a perfect fit for space-saving control panels.

This model is a 3-pole contactor rated for $12\text{ A}$ (AC-3e/AC-3) and a power output of $5.5\text{ kW}/400\text{ V}$. It features a $24\text{ V DC}$ operating coil with an extended operating range and an integrated varistor for coil overvoltage damping, ensuring longevity and reliable operation. Connection is simplified with spring-loaded terminals, offering fast, vibration-proof, and maintenance-free wiring.

Benefit

• Reliable DC Operation: Equipped with a $24\text{ V DC}$ coil and integrated varistor, providing reliable switching and protection against voltage surges.
• Time-Saving Wiring: Spring-loaded terminals allow for quick, tool-free wiring, reducing installation time and cost.
• Vibration-Proof Connection: The spring-loaded technology ensures a secure and maintenance-free connection, even in harsh industrial environments.
• Compact Design: Frame Size S00 minimizes the required panel space without compromising performance (up to $5.5\text{ kW}$).
• High Contact Reliability: Part of the proven SIRIUS modular system, guaranteeing excellent switching performance and long mechanical service life.

Function

1. Motor Switching: Primarily used for safely switching 3-phase AC motors on and off (e.g., pumps, fans, conveyors, compressors).
2. Load Control: Suitable for switching resistive and slightly inductive loads (AC-1) up to $22\text{ A}$ at $400\text{ V}$ (at 40∘C ambient temperature).
3. Integrated Surge Protection: The built-in varistor protects the coil circuit and surrounding control electronics from harmful voltage peaks (surges) upon de-energization.
4. Signal Feedback: The $1\text{ NC}$ auxiliary contact provides status feedback to the control system (e.g., PLC or relays) about the contactor’s open state.

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