Siemens 3RH2911-2XA04-0MA0 Auxiliary Switch, Front Mount, 4 NC, Spring Terminal Original Brand New

Overview

The Siemens SIRIUS 3RH2911-2XA04-0MA0 is a high-performance, front-mounting auxiliary switch block designed to expand the control capabilities of Siemens 3RT2 power contactors and 3RH2 contactor relays. This instantaneous switch features four Normally Closed (4 NC) contacts, identified by terminal designations 51/52, 61/62, 71/72, and 81/82. Its quick and reliable spring-loaded terminals ensure fast, vibration-proof wiring without the need for tools.

As part of the SIRIUS modular system, the 3RH2911-2XA04-0MA0 provides robust and dependable switching for complex control circuits in industrial automation environments.

Key Benefit

• Expanded Control: Easily add four robust Normally Closed auxiliary contacts to your main contactor, simplifying complex control schemes and signaling circuits.
• Fast, Secure Wiring: Spring-loaded terminals (often referred to as spring-type or Push-In) allow for tool-free, secure, and time-saving connection, significantly reducing installation time and maintenance costs.
• Guaranteed Compatibility: Designed specifically for seamless, front-side mounting onto the highly popular Siemens 3RT2 contactors and 3RH2 contactor relays, ensuring a perfect mechanical and electrical fit.
• High Reliability: Features a mirror contact function for enhanced safety in critical applications, complying with international standards like IEC 60947.
• Durable Design: High mechanical and electrical endurance ratings suitable for heavy-duty industrial use and long service life.

Application

The 3RH2911-2XA04-0MA0 is essential for applications requiring additional feedback or interlocks from a contactor's switching state, such as:

• Status signaling (e.g., "contactor is OFF").
• Creating safety interlock circuits.
• Sequential control of multiple loads.
• Logic circuitry within control panels and systems.

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