# Siemens SIRIUS ACT Key-Operated Switch, 2 Positions, 90 Degrees, Metal Front Ring, High-Gloss Black

**URL:** https://aio.lv/en/product--siemens-3su1050-4bf11-0aa0--3234538
**Data updated:** 2026-05-18 02:55 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3SU1050-4BF11-0AA0
**EAN:** 4011209970809
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 24.99 €
**Prices and availability valid until:** 2026-07-24 23:59
**Price without VAT (21%):** 20.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3su1050-4bf11-0aa0--3234538

## 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 SIRIUS ACT key-operated switch (3SU1050-4BF11-0AA0) is a robust industrial control component featuring a 90-degree switching angle and two positions. Designed with a high-gloss black metal front ring, it ensures durability and reliable operation in demanding environments. This switch is ideal for secure machine control and access management, offering high ingress protection and seamless integration into standard control panels.

## Long description

The Siemens SIRIUS ACT key-operated switch is a professional-grade industrial control device engineered for secure operation and access management. Featuring a 90-degree switching angle and two distinct positions, this component provides reliable mechanical control for machinery and electrical systems. The unit is constructed with a high-gloss black metal front ring, ensuring both aesthetic integration into modern control panels and long-term durability in harsh industrial environments.
Advantages
This key-operated switch offers exceptional mechanical robustness and resistance to environmental factors, making it suitable for heavy-duty industrial applications. The high-gloss metal front ring provides a premium finish while maintaining structural integrity against physical impact. Its design ensures precise switching operations, and the key-based mechanism adds a layer of security by preventing unauthorized access or accidental activation of critical equipment.
Suitable for
Secure machine control systems
Access management for industrial panels
Emergency or operational mode selection
Control cabinets in manufacturing facilities
When it may not be suitable
This switch is not intended for applications requiring more than two switching positions or non-key-based operation. It may not be suitable for environments where specific non-metal materials are required for chemical resistance or where a different key profile is mandated by existing site security standards.
Key specifications
Switching angle: 90 degrees
Number of positions: 2
Front ring material: Metal
Finish: High-gloss black
Ingress protection: High-level industrial standard
How to use
The switch is designed for mounting into standard industrial control panels. Once installed, the operator inserts the provided key and rotates it to the desired position to engage or disengage the connected circuit. The mechanism is designed for smooth, tactile feedback, ensuring the user confirms the switch state during operation.
What to consider before purchase
Compatibility with existing control panel cutouts
Key retention requirements for your specific safety protocol
Environmental conditions of the installation site
Integration with existing SIRIUS ACT modular components
Usage recommendations
Ensure that the switch is installed by qualified personnel according to local electrical safety regulations. Regularly inspect the key mechanism and the front ring for debris or mechanical wear to maintain optimal performance and ingress protection levels.

## FAQ

### How much does the Siemens SIRIUS ACT Key-Operated Switch 3SU1050-4BF11-0AA0 cost, and is it available for purchase?

The price is 24.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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/3234538/52364498_large.webp