Siemens 3RT2045-1SP30 SIRIUS 3RT20 Power Contactor, 80A, AC-3, 37 kW, 400V, 3-Pole, 175-280V AC/DC Coil, Size S3, Screw Terminal Original Brand New

High-Performance SIRIUS 3RT20 Power Contactor for Industrial Applications

The Siemens 3RT2045-1SP30 is a core component of the SIRIUS modular system, setting the standard for reliable and efficient switching technology. Designed for worldwide deployment, this 3-pole power contactor is ideal for controlling electric motors up to $37kW$ and is fully compliant with the latest AC-3e/AC-3 standards.

Its compact Size S3 design minimizes panel space while offering robust performance. The inclusion of a wide-range AC/DC operating coil simplifies inventory and ensures reliable operation across various supply voltages, making it an extremely flexible solution for modern control systems.

Benefit

• Reduced Complexity & Inventory: The wide-range $175-280V$ $\text{AC/DC}$ coil, along with the integrated varistor, eliminates the need for external surge suppressors and separate AC/DC coil variants.
• Space-Saving Design: As a Size S3 contactor from the SIRIUS family, it delivers high performance in a compact footprint, optimizing control panel real estate.
• Global Standard Compliance: $\text{IE3}/\text{IE4}$ ready and approved worldwide, ensuring suitability for international machine building and panel export.
• Quick & Reliable Wiring: Secure screw terminals provide robust, easy-to-manage connections for both power and control circuits.
• PLC Compatibility: The “F-PLC-IN” product designation indicates compatibility with functional safety circuits and PLCs, essential for modern automation projects.

Function/Application

The Siemens 3RT2045-1SP30 Power Contactor is primarily used for:

1. Switching Electric Motors: Starting and stopping 3-phase motors up to $37kW$ in industrial machinery, pumps, fans, and conveyor systems.
2. General Resistive Loads: Switching resistive loads ($\text{AC-1}$) up to $125A$ (as per datasheet).
3. Integration with Safety Circuits: The reliable switching action and auxiliary contact are crucial for feedback and interlocking in motor starter assemblies and distributed control systems.

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