# Siemens 3VA9157-0FK21 Door-Coupling Rotary Operating Mechanism for 3VA10/11, IP65, 300mm Shaft

**URL:** https://aio.lv/en/product--siemens-3va91570fk21--3444479
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Home & DIY Accessories
**Manufacturer:** Siemens
**Manufacturer code:** 3VA91570FK21
**EAN:** 4042949005971
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 71.49 €
**Prices and availability valid until:** 2026-08-16 23:59
**Price without VAT (21%):** 59.08 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3va91570fk21--3444479

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 05.08.2026 | free |
| Pickup points | 10.08.2026 | 1.79 EUR |
| Courier delivery to door | 10.08.2026 | 4.99 EUR |

## Summary description

The Siemens 3VA9157-0FK21 is a door-coupling rotary operating mechanism designed for 3VA10 and 3VA11 molded case circuit breakers. It features a 300mm shaft, a lockable handle, and an IP65 protection rating, ensuring secure and reliable operation of the circuit breaker from the outside of the control cabinet. This accessory is essential for safe maintenance and manual switching in industrial electrical distribution systems.

## Long description

The Siemens 3VA9157-0FK21 door-coupling rotary operating mechanism is a high-quality accessory designed for the safe and efficient manual operation of 3VA10 and 3VA11 molded case circuit breakers. This mechanism allows users to control the circuit breaker from the exterior of a control cabinet, ensuring that the internal components remain protected while providing easy access for switching operations. With its robust construction and 300mm shaft, it provides a reliable interface for industrial electrical distribution systems.
Advantages
This rotary operating mechanism offers significant benefits for industrial safety and operational convenience. The inclusion of a lockable handle allows for secure maintenance procedures, preventing unauthorized or accidental activation of the circuit breaker. Its IP65 protection rating ensures that the mechanism is resistant to dust and water ingress, making it suitable for demanding environments. The 300mm shaft provides flexibility in installation depth, accommodating various cabinet sizes and configurations while maintaining precise control over the switching device.
Suitable for
Industrial control cabinets and switchgear assemblies
Manual switching of 3VA10 and 3VA11 molded case circuit breakers
Applications requiring external operation for safety compliance
Environments where dust and moisture protection is mandatory
When it may not be suitable
This mechanism is specifically engineered for use with Siemens 3VA10 and 3VA11 series circuit breakers. It is not compatible with other circuit breaker models or brands. Furthermore, it is not intended for applications where the cabinet depth is insufficient to accommodate the 300mm shaft or where the specific mounting geometry of the 3VA10/11 series is not present.
Key specifications
Compatibility: Siemens 3VA10 and 3VA11 molded case circuit breakers
Shaft length: 300 mm
Protection rating: IP65
Handle type: Lockable rotary handle
Installation: Door-coupling
How to use
Installation involves mounting the rotary mechanism onto the cabinet door and connecting the shaft to the circuit breaker mounted inside the enclosure. Ensure that the shaft is cut to the appropriate length if necessary to match the specific depth of your cabinet. Once installed, the handle can be rotated to toggle the circuit breaker between the ON and OFF positions. To lock the mechanism, insert a padlock through the designated opening on the handle when in the OFF position to prevent accidental operation during maintenance.
What to consider before purchase
Verify the model of your circuit breaker to ensure it is a 3VA10 or 3VA11 unit.
Measure the distance between the circuit breaker and the cabinet door to ensure the 300mm shaft is sufficient.
Confirm that the cabinet door design allows for the mounting of a rotary handle.
Check if additional locking accessories are required for your specific safety protocols.
Usage recommendations
Always ensure the power is disconnected before performing any installation or maintenance on the circuit breaker or the operating mechanism. Regularly inspect the handle and shaft for signs of wear or damage to maintain the IP65 seal integrity.

## FAQ

### How much does the Siemens 3VA9157-0FK21 Door-Coupling Rotary Operating Mechanism cost, and is it available for purchase?

The price is 71.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 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 05.08.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Siemens 3VA9157-0FK21 Door-Coupling Rotary Operating Mechanism be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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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