# LS AU-4M 4a Front Auxiliary Contact Block, 4NO

**URL:** https://aio.lv/en/product--ls-au-4m-4a--12450066
**Data updated:** 2026-05-18 02:45 (EEST)
**Category:** Home Appliance Accessories
**Manufacturer:** LS
**Manufacturer code:** AU-4M 4a
**EAN:** 8809587680665
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 14.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ls-au-4m-4a--12450066

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The LS AU-4M 4a is a front-mounted auxiliary contact block designed for integration with compatible LS contactors. It features 4 normally open (NO) contacts, providing reliable signal switching for control and monitoring circuits. This modular accessory is essential for expanding the functionality of industrial electrical systems, ensuring precise feedback and automation control in various power distribution applications.

## Long description

The LS AU-4M 4a is a high-quality front-mounted auxiliary contact block engineered for seamless integration with compatible LS contactors. This modular component provides four normally open (NO) contacts, enabling reliable signal switching for complex control and monitoring circuits. Designed for industrial environments, it serves as a critical accessory for expanding the operational capabilities of electrical systems, ensuring precise feedback and efficient automation control in diverse power distribution setups.
Advantages
This auxiliary contact block offers exceptional reliability and ease of installation due to its front-mounting design, which saves valuable space within electrical panels. The robust construction ensures long-term performance even in demanding industrial conditions. By providing four additional switching points, it significantly enhances the flexibility of your contactor setup, allowing for more complex interlocking and signaling logic without the need for additional contactors.
Suitable for
Industrial automation systems
Motor control centers
Power distribution panels
Signal feedback and monitoring circuits
Interlocking control logic
When it may not be suitable
This unit is specifically designed for use with compatible LS 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 an auxiliary device for control signals.
Key specifications
Configuration: 4 Normally Open (NO) contacts
Mounting type: Front-mounted
Compatibility: Designed for LS contactor series
Application: Control and signal switching
How to use
To install the LS AU-4M 4a, 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 compatible LS contactor and press firmly until the locking mechanism engages securely. Once attached, connect your control wires to the designated terminals according to your circuit diagram. Verify all connections are tight before restoring power to the system.
What to consider before purchase
Verify compatibility with your specific LS contactor model
Ensure the number of contacts meets your circuit requirements
Check available space in your enclosure for front-mounted accessories
Usage recommendations
Always perform a functional test of the auxiliary contacts after installation to ensure they actuate correctly in sync with the main contactor. Regularly inspect terminal connections for tightness during routine maintenance to prevent signal loss.

## FAQ

### How much does the LS AU-4M 4a Front Auxiliary Contact Block cost, and is it available for purchase?

The price is 17.49 € (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 06.07.2026 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 LS 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 LS 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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