Siemens 3RT2036-3AG20 Power Contactor, 51A, 22kW, 110V AC, SIRIUS S2 Original Brand New

Overview

The Siemens 3RT2036-3AG20 is a high-performance 3-pole power contactor from the globally recognized SIRIUS 3RT2 series, designed for reliably switching motors and industrial loads. Rated for an operational current of 51 A (AC-3e/AC-3) and capable of handling 22 kW at $400\text{ V}$, this robust size S2 contactor is a core component in any modern motor control application.

Its innovative design features a dual-terminal system for maximum flexibility: screw terminals for the main power circuit and spring-loaded terminals for fast, vibration-proof, and maintenance-free connection of the control and auxiliary circuits. It includes 1 NO (Normally Open) + 1 NC (Normally Closed) auxiliary contacts built-in and operates with a $110\text{ V AC}$ control coil (50/60 Hz). As a direct replacement for the proven 3RT1 series, the 3RT2036-3AG20 is IE3/IE4-ready, ensuring efficiency and future-proofing your systems.

Benefits & Advantages

• Reliable Performance: High switching capacity for demanding motor applications up to $22\text{ kW}$.
• Space-Saving Design: Compact size S2 for efficient use of control cabinet space.
• Versatile Wiring: Main circuit uses robust screw terminals, while the control circuit utilizes maintenance-free spring-loaded terminals for quick and secure wiring.
• Integrated Auxiliary Contacts: Built-in $1\text{ NO}+1\text{ NC}$ contacts reduce complexity and component count.
• System Integration: Part of the modular Siemens SIRIUS system, allowing easy combination with overload relays (e.g., 3RU2), circuit breakers, and accessories.
• Global Standard: Compliant with international standards like IEC and UL/CSA.

Function & Application

The 3RT2036-3AG20 power contactor is primarily used for switching 3-phase AC motors (Direct-On-Line starting) and controlling other resistive or inductive loads in industrial automation, HVAC, pumping, conveying, and machine tool applications. Its function is to safely and remotely connect or disconnect power to the load, acting as a crucial element in motor starters, control panels, and automation systems.

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