Siemens 3RT2025-2AC20 SIRIUS Power Contactor, 17A, 24V AC, S0 Original Brand New

Overview

The Siemens 3RT2025-2AC20 is a high-performance, 3-pole power contactor from the modular SIRIUS 3RT2 series, designed primarily for switching motors. It is engineered for industrial control applications where compact design, reliability, and fast, vibration-proof connection technology are critical. This specific model features a $24\text{ V AC}$, $50/60\text{ Hz}$ coil and convenient spring-loaded terminals for the main and auxiliary circuits.

Function

The Siemens 3RT2025-2AC20 contactor serves as an electromagnetic switching device used to control an electrical power circuit, typically for switching three-phase motors.

• Main Function: Safely switches the main power circuit on and off based on the signal received by the $24\text{ V AC}$ control coil.
• AC-3e/AC-3 Category: Specifically rated for switching squirrel-cage motors (three-phase induction motors), which involves making and breaking current under operating conditions.
• Integrated Auxiliary Contacts ($1\text{ NO}+1\text{ NC}$): Provides status feedback and interlocking capabilities for the control circuit, ensuring safe and sequential operation within a larger automation system.
• Spring-Loaded Terminals: Ensures a fast, robust, and maintenance-free electrical connection that is highly resistant to vibration.

Benefit & Features

• Optimal Performance: Rated for $17\text{ A}$ and $7.5\text{ kW}$ at $400\text{ V}$ for reliable motor switching (AC-3e/AC-3).
• Space-Saving Design: Part of the compact SIRIUS modular system, ensuring efficient panel layout (Size S0).
• High Reliability: Features high contact reliability and a mechanical service life of up to $10,000,000$ operating cycles.
• Fast, Secure Wiring: Spring-loaded terminals eliminate the need for re-tightening screws and offer vibration-proof connections, saving installation time.
• Global Compliance: Approved for worldwide use (e.g., IEC and UL/CSA) and is IE3/IE4-ready for high-efficiency motors.
• Modular Flexibility: Compatible with a comprehensive, standardized range of accessories (e.g., auxiliary switch blocks, overload relays, etc.) from the SIRIUS line for easy integration into load feeders.

Application

This contactor is ideal for use in various industrial automation and control systems, including:

• Switching three-phase squirrel-cage motors (e.g., pumps, fans, conveyors).
• Controlling resistive loads.
• Use within complete motor starter assemblies (in combination with overload relays).
• Integration into distribution boards and control panels in harsh environments due to its robust design and secure spring-loaded connections.

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