# Zamel STM-40-40/S Modular Installation Contactor 40A 4NO 230V AC with Manual Control

**URL:** https://aio.lv/en/product--zamel-0001-00018-42481--12458755
**Data updated:** 2026-05-18 09:28 (EEST)
**Category:** Power Sockets
**Manufacturer:** ZAMEL
**Manufacturer code:** 0001-00018-42481
**EAN:** 5903669493327
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 49.99 €
**Prices and availability valid until:** 2026-08-07 23:59
**Price without VAT (21%):** 41.31 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--zamel-0001-00018-42481--12458755

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 27.07.2026 | free |
| Pickup points | 30.07.2026 | 1.89 EUR |
| Courier delivery to door | 30.07.2026 | 4.99 EUR |

## Summary description

The Zamel STM-40-40/S is a modular installation contactor designed for reliable switching of electrical circuits. It features a 40A rated current, 4 normally open (4NO) contacts, and a 230V AC control voltage. Equipped with a manual control switch, this device allows for convenient operation and testing in residential and industrial electrical installations. It is mounted on a standard DIN rail for easy integration into distribution boards.

## Long description

The Zamel STM-40-40/S modular installation contactor is a high-performance electrical component engineered for the reliable switching of power circuits in both residential and industrial environments. This device is designed to handle a rated current of 40A and features four normally open (4NO) contacts, making it suitable for controlling lighting, heating, and ventilation systems. Operating on a 230V AC control voltage, the contactor ensures consistent performance and safety. A standout feature of this model is the integrated manual control switch, which provides users with the ability to manually override the automatic operation for testing or maintenance purposes.
Advantages
The primary benefit of the Zamel STM-40-40/S is its robust construction and versatility in various electrical distribution setups. The inclusion of a manual control switch simplifies troubleshooting and system testing, allowing for direct intervention without needing to adjust the control circuit. Its modular design ensures seamless integration into standard distribution boards by mounting directly onto a DIN rail, which saves space and reduces installation time. Furthermore, the 4NO contact configuration offers flexibility for managing multiple circuits simultaneously, ensuring high operational reliability and longevity in demanding electrical applications.
Suitable for
Controlling lighting circuits in large buildings
Managing heating and ventilation systems
Switching industrial electrical loads
Testing and maintenance of automated electrical installations
This contactor may not be suitable for applications requiring a different contact configuration, such as normally closed (NC) contacts, or for systems operating on DC control voltages. It is also not intended for environments with extreme moisture or high levels of conductive dust unless housed in an appropriately rated protective enclosure.
Key specifications
Rated current: 40A
Contact configuration: 4 normally open (4NO)
Control voltage: 230V AC
Mounting type: DIN rail
Manual control: Integrated switch
To use the Zamel STM-40-40/S, mount the device onto a standard DIN rail within your electrical distribution board. Connect the control circuit to the designated terminals and wire the load circuits to the 4NO contacts. Ensure that all connections are tightened according to the specified torque requirements to prevent overheating. The manual switch can be toggled to test the circuit or to force the contactor into an 'on' or 'off' state regardless of the control signal.
What to consider before purchase
Verify that the 40A rated current is sufficient for your specific load requirements.
Ensure your control circuit provides a 230V AC signal.
Confirm that the 4NO contact configuration meets your circuit design needs.
Check the available space on your DIN rail within the distribution board.
For optimal safety and performance, ensure that the installation is performed by a qualified electrician in accordance with local electrical regulations. Periodically inspect the terminals for tightness and check the manual switch functionality during routine maintenance.

## FAQ

### How much does the Zamel STM-40-40/S Modular Installation Contactor 40A 4NO 230V cost, and is it available for purchase?

The price is 49.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 15 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 27.07.2026 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/12458755/68760871_large.webp