# Zamel STM-40-40 Modular Installation Contactor 40A 4NO 230V AC

**URL:** https://aio.lv/en/product--zamel-ext10000296--12458761
**Data updated:** 2026-05-18 09:28 (EEST)
**Category:** Power Sockets
**Manufacturer:** ZAMEL
**Manufacturer code:** EXT10000296
**EAN:** 5903669487371
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 39.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 32.64 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--zamel-ext10000296--12458761

## 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 Zamel STM-40-40 is a modular installation contactor designed for switching electrical circuits in residential and industrial systems. It features a 40A rated current and 4 normally open (NO) contacts, operating at 230V AC. This reliable device is ideal for controlling lighting, heating, and ventilation systems, ensuring efficient power management and long-term durability in standard DIN rail mounting applications.

## Long description

The Zamel STM-40-40 modular installation contactor is a high-performance electrical component engineered for the reliable switching of circuits in both residential and industrial environments. Designed for seamless integration into standard electrical distribution boards, this contactor manages high-load applications with a rated current of 40A. It features four normally open (NO) contacts and operates on a 230V AC control voltage, providing a robust solution for automated power management.
Advantages
This contactor offers exceptional durability and operational stability, making it a dependable choice for demanding electrical installations. Its modular design allows for quick and efficient mounting on standard DIN rails, significantly reducing installation time. The device is built to withstand frequent switching cycles, ensuring long-term performance in various power distribution setups while maintaining high safety standards for electrical systems.
Suitable for
Controlling lighting systems in large buildings
Managing heating and cooling equipment
Operating ventilation and air conditioning units
Switching industrial motors and pumps
Automated power distribution in residential panels
When it may not be suitable
This device is not intended for use in DC circuits or high-voltage industrial power grids exceeding its rated specifications. It is also not suitable for environments with extreme moisture or corrosive gases unless housed in a protective, sealed enclosure.
Key specifications
Rated current: 40A
Contact configuration: 4 normally open (NO) contacts
Control voltage: 230V AC
Mounting type: DIN rail
Application: Residential and industrial electrical systems
How to use
The Zamel STM-40-40 should be installed by a qualified electrician in accordance with local electrical codes. Mount the unit onto a standard DIN rail within a distribution board. Connect the control circuit to the coil terminals and the load circuit to the main power terminals, ensuring all connections are tightened securely to prevent overheating. Once installed, the device operates automatically based on the signal received from the control circuit.
What to consider before purchase
Verify that the 40A current rating is sufficient for your specific load requirements.
Ensure your control system provides a 230V AC signal.
Check the available space on your DIN rail within the distribution board.
Confirm that the four normally open contacts meet your circuit switching needs.
Usage recommendations
Regularly inspect the contactor for signs of wear or loose connections during routine maintenance of your electrical panel to ensure continued safe operation and longevity of the device.

## FAQ

### How much does the Zamel STM-40-40 Modular Installation Contactor 40A cost, and is it available for purchase?

The price is 39.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 ZAMEL 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 ZAMEL 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/12458761/68760877_large.webp