# Siemens SIRIUS ACT Emergency Stop Mushroom Pushbutton, 40mm, Red, 22mm Mounting

**URL:** https://aio.lv/en/product--siemens-3su1150-1hb20-3ph0--12451394
**Data updated:** 2026-05-22 12:32 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3SU1150-1HB20-3PH0
**EAN:** 4011209956902
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 36.49 €
**Prices and availability valid until:** 2026-07-31 23:59
**Price without VAT (21%):** 30.16 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3su1150-1hb20-3ph0--12451394

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

The Siemens SIRIUS ACT emergency stop mushroom pushbutton is a high-quality industrial control device designed for safety-critical applications. Featuring a 40mm red actuator head, this 22mm diameter mounting unit ensures reliable operation in emergency scenarios. Built for durability and ease of installation, it is an essential component for machine safety systems in various industrial environments.

## Long description

The Siemens SIRIUS ACT Emergency Stop Mushroom Pushbutton is a high-performance industrial control device engineered for safety-critical applications. Featuring a 40mm red actuator head, this unit is designed to provide immediate machine shutdown in hazardous situations. It adheres to the EN ISO 13850 standard, ensuring reliable performance and positive latching when activated. The device is built with a durable, shiny metal housing and includes a yellow backing plate with the inscription NOT-HALT, making it highly visible and compliant with safety regulations.
Advantages
This emergency stop button benefits from an innovative snap-on installation concept that allows for one-handed mounting without the need for specialized tools. The integrated twist prevention feature ensures the unit remains securely in place during operation. Its robust construction provides a high degree of protection against environmental factors, including dust, oils, and caustic solutions, and it is even resistant to high-pressure water jet cleaning. The inclusion of a holder and contact modules makes it a complete, ready-to-install solution for industrial safety systems.
Suitable for
Industrial machinery and production lines
Safety-critical control panels
Outdoor industrial environments
Systems requiring EN ISO 13850 compliance
This device may not be suitable for applications requiring a specific release mechanism other than the rotate-to-unlatch function, such as key-operated or pull-to-unlatch requirements. Additionally, it is intended for standard industrial control circuits and should not be used in environments that exceed its specified protection ratings or electrical load capacities.
Key specifications
Actuator diameter: 40 mm
Mounting diameter: 22 mm
Color: Red
Release method: Rotate-to-unlatch
Contacts: 1 NC + 1 NC
Terminal type: Spring-type
Material: Shiny metal
Standards: EN ISO 13850
Installation is straightforward due to the snap-on design. The unit is mounted into a 22mm hole, and the integrated twist prevention eliminates the need for additional grooving. Once the holder is secured, the contact modules can be attached easily. The device is designed for intuitive operation; in an emergency, the user presses the mushroom head to latch the circuit, and it is reset by rotating the head according to the manufacturer's instructions.
What to consider before purchase
Verify that the 40mm mushroom head size meets your specific safety layout requirements.
Ensure the rotate-to-unlatch mechanism is appropriate for your operational safety protocols.
Check that the spring-type terminal configuration is compatible with your existing wiring infrastructure.
Ensure that the emergency stop button is positioned in an easily accessible location for operators and that the yellow backing plate is clearly visible to comply with safety standards. Regular testing of the latching and release mechanism is recommended to maintain system integrity.

## FAQ

### How much does the Siemens SIRIUS ACT Emergency Stop Pushbutton 3SU1150-1HB20-3PH0 cost, and is it available for purchase?

The price is 36.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 21 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 20.07.2026 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/12451394/68804427_large.webp