Siemens 3RT2017-2KF42-0LA0 SIRIUS Traction Contactor, 12A, 5.5kW, 110V DC Coil, S00, Spring Terminal Original Brand New

Overview

The Siemens 3RT2017-2KF42-0LA0 SIRIUS Traction Contactor is a robust and compact 3-pole power contactor designed for reliable switching applications, particularly in railway and demanding DC environments. Part of the proven SIRIUS family, this size S00 contactor is rated for 12 A (AC-3e/AC-3) and 5.5 kW at 400 V.

It features a specialized 110 V DC operating mechanism with an extended control range (0.7−1.25×Uc​), an integrated suppressor diode, and a plugged-on series resistor for secure, surge-protected operation. The modern spring-loaded terminals ensure quick, vibration-proof wiring.

Key Technical Specification

• Product Number: 3RT2017-2KF42-0LA0
• Product Type: Traction Power Contactor (SIRIUS 3RT2)
• Number of Poles: 3-pole
• Operating Current (AC-3e/AC-3): Ie​=12A
• Operating Power (AC-3): $5.5\text{kW}$ at $400\text{V}$
• Control Supply Voltage: $110\text{V DC}$
• Control Voltage Range: 0.7−1.25×Uc​ (with plugged-on series resistor)
• Auxiliary Contacts: 1 NC (Normally Closed)
• Terminal Type: Spring-loaded terminal
• Frame Size: S00
• Protection: Integrated suppressor diode
• Application: Ideal for DC circuits and railway technology (traction applications).

Benefit and Advantages

• Enhanced Reliability: Specifically engineered as a traction contactor for the demanding requirements of DC applications and railway systems, ensuring long-term operational integrity.
• Surge Protection Included: The integrated suppressor diode and the plugged-on series resistor eliminate the need for external components, providing coil protection against voltage spikes and simplifying installation.
• Time-Saving Wiring: Spring-loaded terminals allow for fast, tool-free, and secure connection, drastically reducing installation and maintenance time compared to screw terminals.
• Compact Design: The space-saving Frame Size S00 is perfect for applications where panel space is at a premium.
• Wide Voltage Range: The coil’s extended operating range (0.7−1.25×Uc​) ensures reliable switching even with fluctuating supply voltages.

Function and Application

The Siemens 3RT2017-2KF42-0LA0 serves as a vital component for switching motors and electrical loads in industrial and mobile applications. Its design caters to:

1. Railway & Transport Technology: Switching of heating, lighting, motor, and auxiliary circuits in rolling stock and other DC traction systems.
2. DC Applications: General-purpose switching of high-current DC loads.
3. Motor Control: Switching of 3-phase AC motors up to $5.5\text{kW}$ where a $110\text{V DC}$ control voltage is required.

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