Siemens 3RT2045-1AB04 Power Contactor S3, 80A, 37kW, 24V AC, 3-Pole Original Brand New

Overview

The Siemens 3RT2045-1AB04 SIRIUS Power Contactor is a high-performance, 3-pole switching device designed for motor control and industrial applications. As part of the SIRIUS modular system, this size S3 contactor delivers robust performance with a compact design and high contact reliability, making it ideal for efficient motor switching up to 37 kW at 400 V (AC-3/AC-3e). It features a $24\text{ V AC},50\text{ Hz}$ control coil and comes equipped with a total of 2 NO + 2 NC integrated auxiliary contacts for enhanced control circuitry flexibility. The main circuit utilizes reliable screw terminal connections.

Key Specifications & Function

• Product Type: Power Contactor (Motor Switching)
• Manufacturer: Siemens
• SIRIUS Family: 3RT2 (Modern, high-efficiency series)
• Contactor Size: S3
• Poles: 3-Pole
• Operational Current ($\text{AC-3e/AC-3}$): $80\text{ A}$
• Operational Power ($\text{AC-3e/AC-3}$): $37\text{ kW}/400\text{ V}$
• Control/Coil Voltage: $24\text{ V AC},50\text{ Hz}$
• Auxiliary Contacts: 2 Normally Open ($\text{NO}$) + 2 Normally Closed ($\text{NC}$) (Removable auxiliary switch block)
• Terminal Type: Screw Terminal (Main and Auxiliary Circuits)
• Application: Switching electric motors, resistive loads, and general industrial load applications.

Benefit & Features

1. High Reliability & Performance: Designed for long mechanical and electrical service life, ensuring consistent operation in demanding industrial environments.
2. Compact Design (S3 Size): Saves space in control cabinets compared to older contactor generations.
3. Versatile Auxiliary Contacts: The built-in $2\text{ NO}+2\text{ NC}$ auxiliary contacts, on a removable block, simplify wiring for complex control circuits and feedback.
4. Global Standards Compliance: Compliant with international standards like IEC, UL/CSA, and ready for use with high-efficiency IE3/IE4 motors.
5. Easy Installation: Features screw terminals for robust and secure wiring connections.
6. SIRIUS Modular System: Seamless compatibility with other SIRIUS components (e.g., overload relays, circuit breakers) for complete motor starter solutions.

For more of our high-quality industrial automation and control products, visit turll today!