# Siemens SIRIUS ACT 3SU1000-4BF11-0AA0 Key-Operated Switch, 22mm, 2 Positions, Plastic, Black

**URL:** https://aio.lv/en/product--siemens-3su1000-4bf11-0aa0--1839259
**Data updated:** 2026-05-18 02:42 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3SU1000-4BF11-0AA0
**EAN:** 4011209962514
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 22.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 19.00 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3su1000-4bf11-0aa0--1839259

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

The Siemens SIRIUS ACT 3SU1000-4BF11-0AA0 is a high-quality key-operated switch designed for industrial control panels. Featuring a 22mm mounting diameter and a durable black plastic front ring, this switch offers two switching positions (O-I) with a 90-degree rotation. It is a reliable component for secure machine operation and access control in various automation systems, ensuring robust performance and ease of integration.

## Long description

The Siemens SIRIUS ACT 3SU1000-4BF11-0AA0 is a professional-grade key-operated switch engineered for reliable control in industrial environments. Designed with a standard 22mm mounting diameter, this unit features a robust black plastic front ring and a secure key mechanism. It provides two distinct switching positions, O-I, with a 90-degree rotation, making it an essential component for machine activation, safety interlocks, and restricted access control within automation systems.
Advantages
This key-operated switch stands out due to its high durability and resistance to harsh industrial conditions. The SIRIUS ACT series is known for its modular design, which allows for quick and straightforward installation into standard control panels. The use of high-quality materials ensures a long service life and consistent performance, while the key-operated mechanism provides an added layer of security by preventing unauthorized operation of machinery or equipment.
Suitable for
Industrial control panels and automation cabinets
Machine start and stop operations
Restricted access control for sensitive equipment
Safety-critical switching applications
When it may not be suitable
This switch is not intended for applications requiring more than two switching positions or for environments where a non-key-operated manual toggle is preferred. It is also not suitable for outdoor installations without additional protective housing to ensure the required ingress protection rating.
Key specifications
Mounting diameter: 22mm
Switching positions: 2 (O-I)
Rotation angle: 90 degrees
Material: Plastic front ring
Color: Black
How to use
To install the switch, insert the actuator into a standard 22mm hole on the control panel and secure it using the provided locking nut. Once mounted, attach the necessary contact blocks to the rear of the actuator. To operate, insert the key and rotate it 90 degrees between the O and I positions to trigger the connected electrical circuit.
What to consider before purchase
Ensure the 22mm mounting hole is available on your control panel
Verify that the two-position O-I functionality meets your circuit requirements
Confirm if additional contact blocks are needed for your specific wiring configuration
Usage recommendations
Always ensure that the power supply is disconnected before installing or performing maintenance on the switch to prevent accidental electrical contact.

## FAQ

### How much does the Siemens SIRIUS ACT 3SU1000-4BF11-0AA0 Key-Operated Switch cost, and is it available for purchase?

The price is 22.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 15.07.2026 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/1839259/47490694_large.webp