Siemens 3RT2045-1AN24 SIRIUS Power Contactor, 80A, 37kW, 220V AC, S3 Original Brand New

Overview: Siemens 3RT2045-1AN24 SIRIUS Power Contactor

The Siemens 3RT2045-1AN24 is a robust, 3-pole SIRIUS 3RT2 power contactor designed for switching motors and other resistive loads up to 80 A and 37 kW at 400 V (AC-3e/AC-3). This high-performance device, part of the SIRIUS modular system, ensures reliable operation and long service life in demanding industrial automation and control applications.

It features a control coil voltage of 220 V AC, 50/60 Hz, and includes integrated auxiliary contacts (2 NO + 2 NC) for control circuit signaling. The large Size S3 contactor utilizes secure screw terminals for main and auxiliary circuits and includes a removable auxiliary switch block for flexible configuration.

Key Product Specifications

• Product Number: 3RT2045-1AN24
• Manufacturer: Siemens
• Product Line: SIRIUS 3RT2
• Contactor Size: S3
• Rated Current (AC-3e/AC-3): 80 A
• Rated Power (400V): 37 kW
• Number of Poles: 3-pole
• Coil Control Voltage: 220 V AC, 50/60 Hz
• Auxiliary Contacts: 2 Normally Open (NO) + 2 Normally Closed (NC)
• Terminals: Screw Terminal (Main and Auxiliary)
• Feature: Removable auxiliary switch block

Benefits & Features

1. High Switching Capacity: Ideal for high-power applications, capable of reliably switching motors up to $37\text{ kW}$ and currents up to $80\text{ A}$.
2. Global Standard Compliance: IEC and UL/CSA approved, ensuring suitability for global projects and machine exports.
3. Integrated Auxiliary Contacts: The built-in $2\text{ NO}+2\text{ NC}$ auxiliary switches simplify wiring and provide essential feedback to your control system.
4. Robust Screw Terminals: Provides a secure, reliable, and high-quality electrical connection for the main and control circuits.
5. Modular & Compatible: Part of the Siemens SIRIUS modular system, ensuring seamless combination with other SIRIUS components like thermal overload relays and circuit breakers (e.g., SIRIUS 3RV2).
6. Efficiency: IE3/IE4 ready, supporting modern, energy-efficient motor switching.

Function & Application

The Siemens 3RT2045-1AN24 power contactor is primarily used in load feeders for:

• Motor Switching: Starting, stopping, and reversing of 3-phase asynchronous motors in machinery, pumps, fans, and compressors.
• Resistive Load Switching: Control of heating elements, lighting systems, and capacitor banks.
• General Load Control: Acting as a high-current switching device in industrial panels and control systems.

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