Siemens 3RT2036-1KB40-1AA0 Power Contactor, S2, 51A, 22kW, 400V, 24V DC Coil, Screw Terminal, SIRIUS 3RT2 Original Brand New

Overview

The Siemens SIRIUS 3RT2036-1KB40-1AA0 is a high-performance, 3-pole power contactor engineered for reliable switching of motors and other loads up to $51\text{ A}$ (AC-3) or $22\text{ kW}$ at $400\text{ V}$. Part of the modular SIRIUS system, this contactor is characterized by its compact design (Frame Size S2), robust specifications, and suitability for integration into modern automation systems, particularly with PLC outputs. Its built-in varistor and wide control voltage range ensure high operational reliability.

Benefit

• Optimized for PLC Systems: The 24 V DC coil with an integrated varistor is specifically designed to work seamlessly with modern PLC output cards, reducing wiring complexity and protecting sensitive electronics from switching surges.
• High Performance in a Compact Size: Frame size S2 delivers a high breaking capacity of $22\text{ kW}$ (AC-3) and $51\text{ A}$ in a space-saving footprint.
• Enhanced Reliability: Integrated surge suppression (varistor) protects the coil and surrounding control components from transient voltage peaks, significantly extending the contactor’s service life.
• Fast & Secure Wiring: Robust screw terminals provide a quick and reliable connection for both the main circuit and control wiring.
• Global Standard Compliance: Fully compliant with IEC 60947 standards, ensuring suitability for global industrial applications.

Function and Application

The Siemens 3RT2036-1KB40-1AA0 is a coupling contactor used for switching and controlling three-phase motors and other high-power resistive or slightly inductive loads.

• Motor Control: Ideal for starting and stopping standard three-phase AC motors (up to $22\text{ kW}$).
• PLC Interfacing: Perfect as an interface relay to switch higher currents from low-power $24\text{ V DC}$ PLC outputs.
• General Load Switching: Used in heating, ventilation, and air conditioning (HVAC) systems, lighting circuits, and capacitor switching where a robust and reliable switching element is required.

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