Overview

The Siemens 3RH1921-2CA10 is a high-quality, front-side auxiliary switch designed for seamless integration with Siemens 3RT1 series contactors. This essential component provides a reliable 1 NO (normally open) contact, allowing for expanded functionality and control within industrial automation and control circuits.

Featuring a modern and efficient spring-type terminal design, it ensures quick, secure, and vibration-resistant wiring, significantly reducing installation time and maintenance efforts.

Key Features

• Front-Side Mounting: Easily mounts on the front of 3RT1 contactors, saving space and simplifying panel layout.
• 1 NO Contact: Provides a normally open contact for signaling or controlling additional circuits.
• Spring-Type Terminals: Offers fast, tool-free wiring for a robust and reliable connection, ideal for high-vibration environments.
• Durability and Reliability: Built to Siemens’ rigorous quality standards, ensuring long-term performance and high operational reliability.
• Compact Design: The compact form factor allows for efficient use of space within control panels.
• Seamless Compatibility: Specifically designed for perfect compatibility with Siemens 3RT1 contactors, ensuring a secure fit and optimal performance.

Benefit

• Enhanced Control: Adds an extra control point to your system, enabling more complex and efficient circuit designs.
• Reduced Installation Time: The innovative spring-type terminals drastically cut down on wiring time and complexity.
• Increased Reliability: The secure, vibration-proof connection minimizes the risk of loose wires and circuit malfunctions.
• Space Optimization: Front-side mounting eliminates the need for side-mounted auxiliary blocks, making panel design more compact.
• Cost-Effective Solution: A simple and affordable way to expand the functionality of your existing 3RT1 contactors without replacing them.

Function

The Siemens 3RH1921-2CA10 auxiliary switch serves a variety of functions in control circuits, including:

• Status Indication: Providing a signal to PLCs or indicator lights to show the status of the main contactor (e.g., “contactor is ON”).
• Interlocking: Creating safety interlocks with other devices to prevent simultaneous operation.
• Control Circuit Expansion: Activating or deactivating additional circuits based on the state of the main contactor.

Technical Specification

• Product Number: Siemens 3RH1921-2CA10
• Contact Configuration: 1 NO (Normally Open)
• Terminal Type: Spring-Type Terminal
• Mounting: Front-side mounting for 3RT1 contactors

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