# Siemens SIRIUS ACT Key-Operated Switch, Metal Front Ring, Glossy Black, 2 Positions, 90° Switching Angle, Key Release 1

**URL:** https://aio.lv/en/product--siemens-3su1050-5bf11-0aa0--3234540
**Data updated:** 2026-05-22 07:19 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3SU1050-5BF11-0AA0
**EAN:** 4011209948747
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Siemens SIRIUS ACT key-operated switch (3SU1050-5BF11-0AA0) features a robust metal front ring with a glossy black finish. Designed for 22mm mounting holes, this switch offers two positions with a 90° switching angle and key release in position 1. It is a reliable industrial control component for secure machine operation and access control in various automation systems.

## Long description

The Siemens SIRIUS ACT key-operated switch is a high-quality industrial control component designed for secure access and machine operation. Featuring a durable metal front ring with a sophisticated glossy black finish, this switch is engineered for integration into standard 22mm mounting holes. It provides precise control with two distinct positions and a 90° switching angle, ensuring reliable performance in demanding automation environments.
Advantages
This key-operated switch stands out due to its robust construction and high-grade materials, which ensure longevity even in harsh industrial conditions. The metal front ring provides superior mechanical stability and resistance to wear. Its design prioritizes operational security, allowing only authorized personnel with the correct key to activate or deactivate specific machine functions. The intuitive 90° switching angle and clear positioning make it easy for operators to use, while the glossy black finish provides a professional and modern aesthetic for control panels.
Suitable for
Industrial automation systems
Control panels for machinery
Secure access control for equipment
Emergency or maintenance mode activation
This switch may not be suitable for environments requiring high-frequency switching operations or applications where a non-locking momentary action is preferred, as this model is designed for specific position-based control. It is also not intended for outdoor use without additional protective enclosures to maintain its ingress protection rating.
Key specifications
Mounting diameter: 22mm
Front ring material: Metal
Finish: Glossy black
Switching positions: 2
Switching angle: 90°
Key release position: 1
To use the Siemens SIRIUS ACT key-operated switch, install it into a standard 22mm hole on your control panel or enclosure. Ensure the locking nut is tightened securely to maintain the integrity of the mounting. Once installed, insert the key and turn it to the desired position to engage or disengage the connected circuit. The key can be removed in position 1, allowing for secure locking of the switch state.
What to consider before purchase
Verify the mounting hole diameter matches the 22mm requirement
Ensure the switching logic aligns with your control system needs
Confirm the key release position meets your security requirements
For optimal performance and safety, ensure that the switch is installed by qualified personnel and that the key is stored in a secure location accessible only to authorized operators.

## 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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