# Siemens 3RA2922-2H Mechanical Interlock for S0 Contactors

**URL:** https://aio.lv/en/product--siemens-3ra2922-2h--12470658
**Data updated:** 2026-05-18 09:26 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** Siemens
**Manufacturer code:** 3RA2922-2H
**EAN:** 4011209892590
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3ra2922-2h--12470658

## 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 3RA2922-2H is a mechanical interlock kit designed for 3-pole and 4-pole contactors of size S0. This component ensures reliable interlocking between two contactors, preventing simultaneous operation for safe control circuit configurations. It is an essential accessory for reversing starter applications and motor control systems, providing robust mechanical protection and operational safety in industrial electrical installations.

## Long description

The Siemens 3RA2922-2H mechanical interlock is a precision-engineered component designed to ensure the safe and reliable operation of contactor combinations. Specifically developed for size S0 contactors, this kit facilitates the secure interlocking of two 3-pole or 4-pole units, effectively preventing simultaneous activation. By providing a robust physical barrier against concurrent switching, it serves as a critical safety element in industrial control panels and motor management systems.
Advantages
This mechanical interlock offers high operational reliability by physically preventing the engagement of two contactors at the same time, which is essential for avoiding short circuits in reversing starter configurations. The design is part of the SIRIUS modular system, ensuring seamless integration with compatible contactors and simplifying the assembly process. Its durable construction provides long-lasting performance in demanding industrial environments, maintaining precise alignment and mechanical integrity over extended service cycles.
Suitable for
Reversing starter applications
Motor control systems requiring interlocking
Safety-critical control circuit configurations
Industrial automation panels
This interlock is not suitable for contactors outside of the S0 size category or for non-compatible series. It should not be used in applications where electrical interlocking is the sole requirement without the need for physical mechanical protection.
Key specifications
Compatibility: Size S0 contactors
Configuration: Lateral interlock
Components included: 2 connectors and 1 anchor
System compatibility: SIRIUS modular system
Application: 3-pole and 4-pole contactors
To install the interlock, ensure that both contactors are de-energized and disconnected from the power supply. Attach the mechanical connectors to the sides of the contactors as specified in the installation guide, then secure the anchor to lock the combination in place. Verify that the mechanical movement is smooth and that the interlock effectively prevents both contactors from closing simultaneously before applying power to the control circuit.
What to consider before purchase
Verify that your contactors are size S0
Ensure the application requires a lateral mechanical interlock
Check compatibility with your existing SIRIUS modular components
Always perform a functional test of the mechanical interlock mechanism before integrating the contactor assembly into a live electrical system to ensure maximum operational safety.

## FAQ

### How much does the Siemens 3RA2922-2H Mechanical Interlock for S0 Contactors cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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/12470658/68795039_large.webp