Siemens SIRIUS 3RT2045-1SB30 Power Contactor, 80A, 37kW (400V), 3-Pole, AC/DC 21-33V Coil, Size S3, Screw Terminal Original Brand New

Overview: Siemens 3RT2045-1SB30 SIRIUS Power Contactor

The Siemens 3RT2045-1SB30 is a high-performance, 3-pole SIRIUS power contactor designed for reliably switching motors up to 37 kW at 400 V (AC-3e/AC-3 rated). This specific model, part of the widely used SIRIUS 3RT20 series, is a size S3 contactor known for its compact design and high contact reliability. It features a unique 21-33V AC/DC coil with integrated varistor for simplified universal control voltage and surge protection. Crucially, it includes a F-PLC-IN (Fail-safe PLC Input) which is ideal for safety-related applications, allowing for direct control from a fail-safe PLC.

Benefit

• Optimized for Safety: The F-PLC-IN control input allows for direct connection to fail-safe PLCs, simplifying wiring and reducing complexity in safety circuits.
• High Performance: Rated for 80 A and 37 kW at 400 V, making it suitable for demanding industrial motor applications (IE2, IE3, and IE4 motors).
• Universal Control: The wide-range 21-33V AC/DC coil minimizes inventory requirements and simplifies commissioning globally.
• Integrated Protection: The built-in varistor offers coil surge suppression, significantly enhancing the lifespan and reliability of the control components.
• Space-Saving Design: Its Size S3 form factor is engineered to be compact, maximizing space efficiency within control cabinets.
• Robust Connection: Reliable and proven screw terminal connections ensure secure wiring for industrial environments.

Functions and Typical Application

The Siemens 3RT2045-1SB30 Contactor is primarily used for switching:

• Three-phase motors in machinery, conveyors, pumps, and ventilation systems.
• Resistive loads (AC-1) with a corresponding rating.
• Serving as a main component in motor starters (direct-on-line, reversing, star-delta combinations).
• Applications requiring high operational reliability and integration with Fail-Safe industrial control systems (due to the F-PLC-IN).

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