# Siemens 3RH2911-1HA10 Auxiliary Contact Block for 3RT2.1 and 3RT2.2 Contactors

**URL:** https://aio.lv/en/product--siemens-3rh29111ha10--1840825
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** Siemens
**Manufacturer code:** 3RH29111HA10
**EAN:** 4011209829282
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Siemens 3RH2911-1HA10 is an auxiliary contact block designed for seamless integration with Siemens 3RT2.1 and 3RT2.2 series contactors. This component provides reliable switching functionality for control circuits, featuring a 1NO configuration. It is essential for industrial automation and motor control applications, ensuring precise signal transmission and system monitoring within electrical panels.

## Long description

The Siemens 3RH2911-1HA10 auxiliary contact block is a high-quality switching component engineered for seamless integration with Siemens 3RT2.1 and 3RT2.2 series contactors. This device is designed to expand the switching capabilities of your contactor system, providing a reliable 1NO (normally open) contact configuration for control circuits. It is a critical element for industrial automation, ensuring precise signal transmission and effective monitoring of electrical systems within control panels.
Advantages
This auxiliary contact block offers exceptional reliability and durability, meeting the rigorous demands of industrial environments. Its design allows for quick and tool-free mounting onto compatible contactors, significantly reducing installation time and effort. The robust construction ensures consistent performance and long service life, even in demanding operational conditions. By providing an additional switching point, it enhances the flexibility of your control logic and system diagnostics.
Suitable for
Industrial automation systems
Motor control centers
Electrical control panels
Signal feedback and monitoring circuits
Interlocking and control logic applications
When it may not be suitable
This component is specifically designed for use with Siemens 3RT2.1 and 3RT2.2 contactors. It is not compatible with other contactor series or brands, and attempting to force a fit may damage the equipment. Furthermore, it is not intended for high-power main circuit switching, as it is strictly rated for auxiliary control signals.
Key specifications
Contact configuration: 1NO (Normally Open)
Compatibility: Siemens 3RT2.1 and 3RT2.2 contactors
Mounting type: Front-mounted
Application: Control circuit switching
How to use
To install the auxiliary contact block, ensure that the power supply to the contactor is completely disconnected. Align the block with the designated mounting interface on the front of the 3RT2.1 or 3RT2.2 contactor. Press the block firmly until it snaps into place, ensuring a secure mechanical and electrical connection. Once installed, connect the control wires to the terminal points according to your circuit diagram. Always verify the connection integrity before restoring power to the system.
What to consider before purchase
Verify the compatibility with your existing contactor model
Ensure the 1NO configuration meets your specific control logic requirements
Check the available space within your electrical enclosure for front-mounted accessories
Usage recommendations
Always perform a functional test of the control circuit after installation to ensure the auxiliary contact operates correctly in response to the main contactor state. Regularly inspect terminal connections for tightness to maintain optimal electrical conductivity.

## FAQ

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### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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