# LSiS UA-4 3a1b Front Auxiliary Contact Block

**URL:** https://aio.lv/en/product--lsis-ua-4-3a1b--12460750
**Data updated:** 2026-05-18 09:31 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** LSiS
**Manufacturer code:** UA-4 3a1b
**EAN:** 8809587681143
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 11.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 9.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lsis-ua-4-3a1b--12460750

## 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 LSiS UA-4 3a1b is a front-mounted auxiliary contact block designed for integration with compatible contactors. It features a 3NO and 1NC configuration, providing reliable switching signals for control and monitoring circuits. This modular component is essential for expanding the functionality of electrical switchgear systems in industrial and commercial automation applications.

## Long description

The LSiS UA-4 3a1b is a front-mounted auxiliary contact block engineered for seamless integration with compatible LSiS contactors. This modular device serves as a critical interface for control and monitoring systems, ensuring precise feedback on the operational status of the main switchgear. With its robust construction and reliable switching mechanism, it facilitates the expansion of electrical control circuits in various industrial and commercial automation environments.
Advantages
The primary benefit of the LSiS UA-4 3a1b is its space-saving front-mount design, which allows for easy installation without increasing the footprint of the contactor. The 3NO and 1NC configuration provides versatile switching options, enabling complex control logic and signal feedback. Its high-quality materials ensure long-term durability and consistent performance under demanding operational conditions, making it a dependable choice for critical infrastructure and automation tasks.
Suitable for
Industrial automation control panels
Monitoring and signaling circuits
Electrical switchgear expansion
Commercial building management systems
When it may not be suitable
This auxiliary contact block is specifically designed for use with compatible LSiS contactors and may not be physically or electrically compatible with contactors from other manufacturers. It is not intended for high-power switching applications, as it is strictly designed for control and signal circuit integration.
Key specifications
Configuration: 3 Normally Open (NO) and 1 Normally Closed (NC) contacts
Mounting type: Front-mounted
Compatibility: Designed for LSiS contactor series
Function: Auxiliary signal switching
How to use
To install the LSiS UA-4 3a1b, ensure that the main power supply to the contactor is disconnected to prevent accidental activation. Align the auxiliary block with the front mounting interface of the contactor and press firmly until the locking mechanism engages securely. Once attached, connect the control wires to the appropriate terminals according to your circuit diagram. Verify that the contacts actuate correctly by manually testing the contactor before applying full system power.
What to consider before purchase
Verify compatibility with your specific LSiS contactor model
Ensure the contact configuration (3NO/1NC) meets your control logic requirements
Confirm that the installation space allows for front-mounted accessories
Usage recommendations
Always perform a functional test of the auxiliary contacts after installation and before integrating the contactor into a live production environment to ensure proper signal transmission.

## FAQ

### How much does the LSiS UA-4 3a1b Front Auxiliary Contact Block cost, and is it available for purchase?

The price is 11.49 € (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 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 LSiS 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 LSiS 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/12460750/68762719_large.webp