# F&F ST40-22 Modular Contactor 40A 2NO+2NC

**URL:** https://aio.lv/en/product--ff-st40-22--12447604
**Data updated:** 2026-05-18 02:43 (EEST)
**Category:** Power Sockets
**Manufacturer:** FF
**Manufacturer code:** ST40-22
**EAN:** 5908312599470
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 50.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 42.14 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-st40-22--12447604

## 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 F&F ST40-22 is a high-quality modular contactor designed for reliable electrical circuit switching in residential and industrial installations. Featuring a 40A rated current and a configuration of 2 normally open (NO) and 2 normally closed (NC) contacts, it ensures efficient control of lighting, heating, and motor systems. Its compact modular design allows for easy DIN-rail mounting in standard electrical distribution boards.

## Long description

The F&F ST40-22 is a professional-grade modular contactor engineered for the reliable switching of electrical circuits in both residential and industrial environments. With a robust 40A rated current capacity and a versatile configuration of two normally open and two normally closed contacts, this device provides efficient control over various electrical loads, including lighting systems, heating elements, and motor-driven equipment. Its compact, modular architecture is specifically designed for seamless integration into standard electrical distribution boards, ensuring a clean and organized installation on a DIN rail.
Advantages
This contactor stands out due to its high operational reliability and durable construction, which are essential for maintaining consistent performance in demanding electrical systems. The modular design simplifies the installation process, allowing for quick mounting alongside other DIN-rail components. By offering a combination of normally open and normally closed contacts, it provides greater flexibility in circuit design and automation control compared to standard single-function contactors. The device is built to withstand frequent switching operations, making it a dependable choice for long-term use in various infrastructure projects.
Suitable for
Control of lighting circuits in commercial and residential buildings
Management of electric heating systems and ventilation units
Switching of small to medium-sized industrial motors
Integration into automated building management systems
When it may not be suitable
This contactor is not intended for applications requiring switching currents that exceed its 40A rating, as this could lead to device failure or fire hazards. It is also not suitable for environments with extreme moisture, dust, or corrosive gases unless housed in an appropriately rated protective enclosure.
Key specifications
Rated current: 40A
Contact configuration: 2 normally open (NO) and 2 normally closed (NC)
Mounting type: DIN rail (35mm)
Design: Modular
How to use
Installation should be performed by a qualified electrician in accordance with local electrical regulations. The contactor is designed to be snapped onto a standard 35mm DIN rail within a distribution board. Ensure that the power supply is disconnected before making any connections. Connect the control circuit to the coil terminals and the load circuit to the power terminals, ensuring that the wire gauges are appropriate for the 40A current rating. Once installed, verify that all connections are secure and that the contactor operates correctly under load.
What to consider before purchase
Verify that the 40A current rating is sufficient for your specific load requirements.
Ensure the 2NO+2NC contact configuration matches your circuit control logic.
Check the available space in your distribution board to accommodate the modular width.
Confirm that the control voltage of the coil matches your system voltage.
Usage recommendations
Regularly inspect the contactor for signs of wear or overheating, especially in high-frequency switching applications. Ensure that the electrical cabinet remains clean and dry to maintain optimal performance and longevity of the device.

## FAQ

### How much does the F&F ST40-22 Modular Contactor cost, and is it available for purchase?

The price is 50.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 FF 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 FF 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/12447604/68750656_large.webp