# Siemens 3RH2140-2BB40 Auxiliary Contactor, 4NO, 24V DC, Spring-Loaded Terminals

**URL:** https://aio.lv/en/product--siemens-3rh21402bb40--1801931
**Data updated:** 2026-05-18 02:44 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** Siemens
**Manufacturer code:** 3RH21402BB40
**EAN:** 4011209828629
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 42.99 €
**Prices and availability valid until:** 2026-08-08 23:59
**Price without VAT (21%):** 35.53 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rh21402bb40--1801931

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 28.07.2026 | free |
| Pickup points | 31.07.2026 | 1.89 EUR |
| Courier delivery to door | 31.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RH2140-2BB40 is a high-reliability auxiliary contactor designed for industrial control circuits. It features 4 normally open (NO) contacts and operates on a 24V DC control voltage. Equipped with spring-loaded terminals for secure and vibration-resistant connections, this size S00 contactor is ideal for switching control signals in automation systems and electrical panels.

## Long description

The Siemens 3RH2140-2BB40 is a high-performance auxiliary contactor engineered for demanding industrial control applications. This compact S00 size device is designed to manage control signals with precision, featuring four normally open (NO) contacts that ensure reliable switching in complex electrical circuits. Operating on a 24V DC control voltage, it provides a stable and efficient solution for modern automation systems.
Advantages
The primary benefit of this auxiliary contactor is its robust construction and the integration of spring-loaded terminals. These terminals facilitate rapid installation while providing superior resistance to vibrations, which is essential for maintaining consistent electrical contact in industrial environments. The S00 size allows for space-saving installation in crowded control panels, and the high-quality materials used by Siemens ensure long-term operational reliability and minimal maintenance requirements.
Suitable for
Industrial automation control circuits
Electrical panel signal switching
Integration into PLC-based control systems
Machine tool control applications
This contactor may not be suitable for applications requiring high-power load switching, as it is specifically designed for auxiliary control signals rather than main power circuits. Additionally, it is not intended for use in environments exceeding its specified DC voltage rating or in extreme conditions that fall outside the standard operating temperature range for S00 contactors.
Key specifications
Contact configuration: 4 normally open (NO)
Control voltage: 24V DC
Terminal type: Spring-loaded
Size: S00
To use the Siemens 3RH2140-2BB40, mount the device onto a standard DIN rail within your control cabinet. Connect the 24V DC control supply to the designated coil terminals and wire your control signals to the four normally open contact points. Ensure that the spring-loaded terminals are fully engaged to provide a secure, vibration-resistant connection before energizing the circuit.
What to consider before purchase
Verify that your control system operates on a 24V DC supply
Ensure the S00 size fits within your existing panel layout
Confirm that four normally open contacts meet your specific circuit requirements
For optimal performance and longevity, ensure that the contactor is installed in a clean, dry environment and that all wiring is performed in accordance with local electrical safety standards. Periodically inspect the spring-loaded connections to ensure they remain secure after initial installation.

## FAQ

### How much does the Siemens 3RH2140-2BB40 Auxiliary Contactor cost, and is it available for purchase?

The price is 42.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 28.07.2026 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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