Siemens SIRIUS 3RT2017-1LB41 Power Contactor, 12A, 5.5kW, 24V DC Coil, Size S00, Screw Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT2017-1LB41 is a compact, high-performance 3-pole power contactor from the globally recognized SIRIUS modular system, specifically engineered for switching motors up to 5.5 kW at 400 V (AC-3e/AC-3). Featuring a 24 V DC solenoid coil with a wide operating range of 0.7−1.25×Uc​ and an integrated varistor for coil surge suppression, this size S00 contactor offers exceptional reliability. It comes equipped with 1 Normally Open (NO) auxiliary contact and secure screw terminals for straightforward wiring in industrial control applications.

Benefits & Advantages

• Space-Saving Design (Size S00): Extremely compact dimensions optimize control panel space without compromising performance.
• High Reliability: Part of the trusted Siemens SIRIUS modular system, ensuring long mechanical and electrical service life.
• DC Coil with Integrated Protection: The $24\text{ V DC}$ coil with a wide voltage tolerance and integrated varistor protection eliminates the need for external surge suppressors, simplifying installation and protecting the control system.
• Direct Interfacing: The auxiliary contact ($1\text{ NO}$) is included, ready for direct integration into control and monitoring circuits.
• Secure & Simple Wiring: Robust screw terminals ensure a firm, reliable connection suitable for demanding industrial environments.
• Global Standard: Compliant with major international standards ($\text{IEC}$, $\text{UL}$, $\text{CSA}$, $\text{CCC}$), making it suitable for worldwide deployment.

Function & Application

The Siemens 3RT2017-1LB41 serves as a core switching device in industrial automation and control circuits. Its primary function is the frequent switching of 3-phase AC motors (AC-3/AC-3e duty) and non-motor loads.

Typical Applications Include:

• Starting, stopping, and reversing motors for pumps, fans, and compressors.
• Switching resistive loads (AC-1).
• Integration into complex motor starter combinations, such as direct-on-line (DOL) or reversing starters.
• Industrial machinery, conveying systems, and HVAC equipment.

Compatibility & Accessories

The SIRIUS 3RT20 series allows for easy expansion. This contactor is fully compatible with:

• SIRIUS 3RU2 thermal overload relays (Size S00).
• Additional front- and side-mounted auxiliary switch blocks.
• Various function modules (e.g., timing, interlocking).

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