# Siemens 3RH2131-1BB40 Auxiliary Contactor, 3NO + 1NC, 24V DC, Size S00

**URL:** https://aio.lv/en/product--siemens-3rh2131-1bb40--1796384
**Data updated:** 2026-05-18 02:39 (EEST)
**Category:** Miscellaneous repair tools
**Manufacturer:** Siemens
**Manufacturer code:** 3RH2131-1BB40
**EAN:** 4011209848450
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 41.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 34.70 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rh2131-1bb40--1796384

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RH2131-1BB40 is a high-reliability auxiliary contactor designed for industrial control circuits. Featuring a 24V DC coil, this S00 size device provides 3 normally open (NO) and 1 normally closed (NC) contacts. It is engineered for efficient switching of control signals in automation systems, ensuring durability and precise performance in demanding electrical environments.

## Long description

The Siemens 3RH2131-1BB40 is a high-performance auxiliary contactor engineered for reliable operation in industrial control circuits. This compact S00-sized device is designed to manage control signals efficiently, featuring a 24V DC coil and a contact configuration of 3 normally open (NO) and 1 normally closed (NC) contacts. It serves as a critical component in automation systems, providing the durability and precision required for demanding electrical environments.
Advantages
This auxiliary contactor offers exceptional reliability and long-term stability, making it a preferred choice for complex control systems. Its compact S00 design allows for space-saving installation in control cabinets, while the robust construction ensures consistent performance under frequent switching operations. The device is built to meet high industrial standards, facilitating seamless integration into existing automation infrastructures and reducing maintenance requirements through its high mechanical and electrical endurance.
Suitable for
Industrial automation and control systems
Switching control signals in electrical panels
Interlocking and signaling circuits
Integration with motor starters and contactor assemblies
When it may not be suitable
This device is intended specifically for control circuit switching and is not designed to handle high-power loads or main motor currents. It should not be used in applications requiring AC coil operation, as this model is strictly limited to 24V DC power supplies.
Key specifications
Coil voltage: 24V DC
Contact configuration: 3 normally open (NO) and 1 normally closed (NC)
Size: S00
Application: Control circuit switching
How to use
The contactor is designed for standard DIN rail mounting or screw mounting within an electrical enclosure. Ensure the control circuit voltage matches the 24V DC specification before connecting the coil terminals. Wiring should be performed according to the terminal markings to ensure the correct operation of the NO and NC contacts. Always verify that the control signals are within the rated operational limits to prevent damage to the internal components.
What to consider before purchase
Verify that your control system operates on 24V DC
Ensure the contact configuration (3NO + 1NC) meets your circuit requirements
Check available space in your control cabinet for S00 size components
Usage recommendations
Regularly inspect the terminal connections for tightness and ensure the environment is free from excessive dust or moisture to maintain optimal performance over the product's lifespan.

## FAQ

### How much does the Siemens 3RH2131-1BB40 Auxiliary Contactor cost, and is it available for purchase?

The price is 41.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 88 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 08.07.2026 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

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