# Siemens 3RA2912-2H Mechanical Interlock Connector for 3RT2.1 Contactors

**URL:** https://aio.lv/en/product--siemens-3ra2912-2h--12455734
**Data updated:** 2026-05-18 09:33 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** Siemens
**Manufacturer code:** 3RA2912-2H
**EAN:** 4011209892583
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3ra2912-2h--12455734

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RA2912-2H is a mechanical interlock connector designed for use with 3RT2.1 series contactors. This component ensures reliable mechanical interlocking between two contactors, preventing simultaneous activation. It is an essential accessory for motor reversing circuits and safety-critical switching applications, providing robust performance and easy installation in industrial control systems.

## Long description

The Siemens 3RA2912-2H mechanical interlock connector is a specialized component engineered for the SIRIUS modular system, specifically designed to be used with 3RT2.1 series contactors. This assembly consists of two connectors and one anchor, providing a robust solution for creating a reliable mechanical interlock between two contactors. By physically preventing the simultaneous activation of both contactors, this device ensures operational safety and prevents short circuits in complex control configurations.
Advantages
This mechanical interlock offers a high level of reliability and safety for industrial control systems. Its design is optimized for the SIRIUS modular system, ensuring seamless integration and consistent performance. The component is built to withstand demanding industrial environments, providing a secure and durable connection that maintains the integrity of the switching circuit over time. Its straightforward design allows for efficient assembly, reducing installation time and complexity in control cabinet setups.
Suitable for
Motor reversing circuits
Safety-critical switching applications
Industrial automation control systems
Dual-contactor interlocking configurations
When it may not be suitable
This connector is specifically engineered for 3RT2.1 series contactors and is not compatible with other contactor sizes or series. It should not be used in applications where mechanical interlocking is not required or where electronic interlocking solutions are preferred.
Key specifications
Compatibility: Siemens 3RT2.1 series contactors
Components: 2 connectors and 1 anchor
System: SIRIUS modular system
Function: Mechanical interlocking to prevent simultaneous activation
How to use
To install the mechanical interlock, ensure that both contactors are de-energized and disconnected from the power supply. Align the two contactors side-by-side according to the SIRIUS modular system guidelines. Insert the two connectors into the designated slots on the contactors and secure them using the provided anchor. Verify that the mechanical linkage moves freely and that the interlocking mechanism correctly prevents both contactors from closing at the same time before applying power to the system.
What to consider before purchase
Verify that your contactors belong to the 3RT2.1 series
Ensure sufficient space is available in the control cabinet for side-by-side mounting
Confirm that the mechanical interlock meets the safety requirements of your specific application
Usage recommendations
Always perform a functional test of the mechanical interlock mechanism after installation and before integrating the contactors into a live control circuit to ensure proper operation and safety.

## FAQ

### How much does the Siemens 3RA2912-2H Mechanical Interlock Connector cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 19 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### 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

https://aio.lv/img/cache/product/12455734/68795356_large.webp