Siemens 3RT2025-2KF40 SIRIUS 3RT2 Power Contactor, 3-Pole, 7.5 kW, 17A, 400V, 110V DC Coil, Spring Terminal Original Brand New

Overview: Siemens 3RT2025-2KF40 Power Contactor

The Siemens 3RT2025-2KF40 Power Contactor from the SIRIUS 3RT2 series is a compact and high-performance switching device for controlling electric motors and other loads. Designed to meet modern industrial demands, this 3-pole contactor is rated for $17\text{ A}$ (AC-3e/AC-3) and a power output of $7.5\text{ kW}$ at $400\text{ V}$. It features a $110\text{ V DC}$ control coil with an integrated varistor for surge protection, and utilizes reliable spring-loaded terminals for fast, vibration-proof, and maintenance-free wiring.

Benefit

• Reliable Motor Control: Rated for $7.5\text{ kW}$ and $17\text{ A}$ (AC-3/AC-3e), this contactor is ideal for standard three-phase motor applications.
• Fast and Secure Wiring: Spring-loaded terminals significantly reduce wiring time and ensure a highly reliable connection, especially in environments subject to vibration.
• PLC Integration Ready: With a $110\text{ V DC}$ coil and high input compatibility, the unit is perfectly suited for direct control by modern PLC systems.
• Space Saving Design (Size S0): Part of the SIRIUS modular system, the compact S0 frame size saves valuable panel space.
• Enhanced Coil Protection: The integrated varistor provides essential surge suppression, increasing the lifespan and reliability of the DC coil and control circuit.
• Ready-to-Use Feedback: Integrated $1\text{ NO}+1\text{ NC}$ auxiliary contacts provide immediate status feedback to your control system without needing external add-ons.

Function

The Siemens 3RT2025-2KF40 functions as an electromechanical switch (power contactor) in industrial control applications. It uses a low-power $110\text{ V DC}$ signal applied to its coil to electromagnetically close the three main power contacts, thereby switching the high-power three-phase $400\text{ V}$ load to the motor. Its high electrical and mechanical endurance, along with its capability for switching up to $1000$ operations per hour (AC-3/AC-3e), makes it an essential component for motor starters and control circuits.