# Siemens 3SK1112-1BB40 Safety Relay, 24V DC, 3 Transistor Outputs

**URL:** https://aio.lv/en/product--siemens-3sk1112-1bb40--1779011
**Data updated:** 2026-05-18 02:40 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3SK1112-1BB40
**EAN:** 4011209913547
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 146.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 121.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3sk1112-1bb40--1779011

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3SK1112-1BB40 is a high-reliability safety relay designed for industrial automation and machine safety applications. Operating at 24V DC, this device features 3 transistor outputs to ensure precise control and monitoring of safety circuits. It is engineered for seamless integration into safety systems, providing robust performance and operational reliability in demanding industrial environments.

## Long description

The Siemens 3SK1112-1BB40 safety relay is a high-performance component engineered for industrial automation and machine safety systems. Operating on a 24V DC power supply, this device is designed to monitor safety circuits with precision, ensuring that machinery stops safely when required. It features three transistor outputs, providing reliable switching capabilities for various safety-related applications in demanding industrial environments.
Advantages
This safety relay offers exceptional reliability and durability, making it a cornerstone for modern safety architectures. Its compact design allows for efficient space utilization within control cabinets, while the transistor output technology ensures fast and accurate response times. The device is built to withstand rigorous industrial conditions, offering consistent performance that helps maintain high safety standards and operational continuity in automated production lines.
Suitable for
Emergency stop monitoring
Safety gate and interlock monitoring
Light curtain integration
Industrial automation safety circuits
Machine control systems
When it may not be suitable
This device is not intended for applications requiring high-current relay outputs, as it utilizes transistor outputs designed for electronic signal switching. It is also not suitable for environments exceeding the specified temperature or voltage ratings provided in the technical documentation.
Key specifications
Operating voltage: 24V DC
Output type: 3 transistor outputs
Application: Industrial safety and automation
Design: Compact modular housing
How to use
Installation should be performed by qualified personnel in accordance with local safety regulations. The relay is typically mounted on a standard DIN rail within a control cabinet. Connect the safety sensors or switches to the input terminals and wire the transistor outputs to the corresponding safety control circuits or PLC inputs. Ensure that all wiring is secure and that the power supply matches the 24V DC requirement before energizing the system.
What to consider before purchase
Verify that your control system is compatible with transistor output signals.
Ensure the 24V DC power supply meets the current requirements of the relay.
Check that the safety category of the relay aligns with your machine risk assessment.
Confirm the physical space available in your control cabinet for installation.
Usage recommendations
Regularly test the safety function of the relay as part of your scheduled machine maintenance program to ensure continued operational integrity and compliance with safety standards.

## FAQ

### How much does the Siemens 3SK1112-1BB40 Safety Relay cost, and is it available for purchase?

The price is 146.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 16.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Siemens 3SK1112-1BB40 Safety Relay 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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