Siemens SIRIUS 3RT2025-2KG40 Power Contactor, 17A, 7.5 kW, 125V DC Coil, Spring-Loaded Terminal, Size S0 Original Brand New

Overview

The Siemens SIRIUS 3RT2025-2KG40 is a high-performance, 3-pole power contactor designed for reliable switching of motors and auxiliary circuits up to 17 A (AC-3e/AC-3) or 7.5 kW at $400\text{ V}$. Part of the modular SIRIUS system, this contactor is engineered for efficiency and compactness. It features a robust 125 V DC control coil with a wide operating range (0.7–1.25×Uc​) and includes a plugged-in varistor for coil overvoltage protection. Its Size S0 frame makes it ideal for space-constrained applications.

Key Technical Specification

• Product Number: 3RT2025-2KG40
• Series: SIRIUS 3RT2
• Contactor Type: Power Contactor (Coupling Contactor AC-3e/AC-3)
• Poles: 3-pole (Main contacts: 3 NO)
• Rated Operational Current (Ie): $17\text{ A}$ (at $400\text{ V}$, AC-3e/AC-3)
• Rated Operational Power: $7.5\text{ kW}$ (at $400\text{ V}$, AC-3e/AC-3)
• Control Coil Voltage (Uc): $125\text{ V DC}$
• Coil Operating Range: 0.7–1.25×Uc​ (Suitable for PLC outputs)
• Auxiliary Contacts: $1\text{ NO}+1\text{ NC}$ (Integrated)
• Terminal Type: Spring-loaded terminal (fast, maintenance-free, vibration-proof connection)
• Frame Size: S0
• Protection: Integrated plugged-in varistor for surge suppression.
• Expandability: Not expandable with an auxiliary switch block.

Benefits & Advantages

1. PLC Compatibility: Specifically engineered with a $125\text{ V DC}$ coil and wide voltage range, it is perfectly suited for direct connection to PLC outputs, simplifying control wiring and reducing complexity.
2. Reliable Motor Protection: Rated for AC-3e/AC-3, ensuring highly reliable switching for standard motor control applications.
3. Fast & Maintenance-Free Wiring: Features spring-loaded terminals, offering a quick, secure, and vibration-proof connection, significantly reducing installation and maintenance time compared to traditional screw terminals.
4. Integrated Surge Protection: Includes a built-in varistor to protect the control coil and system electronics from harmful voltage spikes, enhancing longevity and system stability.
5. Compact Design: The Size S0 frame provides a high switching capacity in a small footprint, ideal for efficient panel design.

Function/Application

The Siemens 3RT2025-2KG40 Power Contactor is the ideal choice for switching 3-phase asynchronous motors, resistive loads, and general auxiliary circuits in:

• Industrial Machinery and Equipment
• HVAC Systems
• Pumps and Conveyor Systems
• Control Panels and Cabinets

• Applications requiring direct interface with electronic controls or PLC systems.

For more Siemens SIRIUS industrial control products and components, visit Turll today!