Siemens 3RT2045-3XB40-0LA2 Contactor, Size S3, 80A, 37kW, 24V DC, Screw/Spring Terminals Original Brand New

Overview: Siemens 3RT2045-3XB40-0LA2 SIRIUS Power Contactor

The Siemens 3RT2045-3XB40-0LA2 is a high-performance SIRIUS line traction contactor designed for reliable switching of motors and demanding industrial loads, aligning with both the $\text{AC-3e}$ and $\text{AC-3}$ standards. This $3\text{-pole}$ contactor handles a substantial $80\text{ A}$ rated current and is suitable for motor applications up to $37\text{ kW}$ at $400\text{ V}$.

A key feature is its robust $24\text{ V DC}$ solid-state operating mechanism which ensures high switching reliability and a wide operating range of $0.7$ to $1.25$ times the control supply voltage ($\text{Uc}$). For enhanced durability and reduced wear on the control circuit, the unit includes an integrated varistor for surge suppression. The contactor is built in Frame Size S3 and offers flexible connection options with screw terminals for the main circuit and spring-loaded terminals for the control and auxiliary circuits.

Key Benefit

• High Reliability: The solid-state operating mechanism offers precision control, low power consumption, and a long service life, especially in demanding $\text{DC}$ control applications.
• Surge Protection: An integrated varistor provides essential protection against voltage spikes, simplifying installation and safeguarding sensitive control components.
• Flexible Connection: Utilizes screw terminals for secure, high-current main connections and spring-loaded terminals for fast, vibration-proof wiring of auxiliary and control circuits.
• Compact Power: The Frame Size S3 design provides significant power handling capability ($80\text{ A}$, $37\text{ kW}$) in a compact form factor.
• Immediate Feedback: Includes one normally open ($\text{1 NO}$) and one normally closed ($\text{1 NC}$) auxiliary contact for easy integration into safety and control feedback loops.

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