# F&F ST25-40 Modular Contactor 25A 4NO 230V AC

**URL:** https://aio.lv/en/product--ff-st25-40--12472542
**Data updated:** 2026-05-18 09:34 (EEST)
**Category:** Power Sockets
**Manufacturer:** FF
**Manufacturer code:** ST25-40
**EAN:** 5905857151835
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 25.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 21.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-st25-40--12472542

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The F&F ST25-40 is a modular contactor designed for reliable electrical circuit switching. It features a 25A rated current, 4 normally open (NO) contacts, and operates on a 230V AC control voltage. This compact device is suitable for installation on standard DIN rails, making it an ideal solution for industrial and residential automation, lighting control, and heating systems requiring efficient power management.

## Long description

The F&F ST25-40 modular contactor is a high-performance electrical switching device engineered for precision and reliability in various power management applications. Designed to handle a rated current of 25A, this unit features four normally open (NO) contacts and operates on a standard 230V AC control voltage. Its compact, modular design allows for seamless integration into electrical distribution boards, ensuring efficient control of electrical circuits in both residential and industrial environments.
Advantages
This modular contactor offers exceptional durability and consistent performance under demanding conditions. The device is optimized for quick and secure mounting on standard DIN rails, which simplifies the installation process for electrical professionals. Its robust construction ensures long-term operational stability, while the four normally open contacts provide versatile switching capabilities for complex electrical systems. The contactor is designed to minimize energy consumption during operation, contributing to the overall efficiency of the electrical installation.
Suitable for
Residential and industrial automation systems
Lighting control circuits
Heating and ventilation systems
Power management for electrical appliances
When it may not be suitable
This device is not intended for use in environments with extreme moisture, high levels of dust, or corrosive gases, as these conditions may compromise the internal components. It is also not suitable for applications requiring a control voltage other than 230V AC or for loads exceeding the 25A rated current capacity.
Key specifications
Rated current: 25A
Contact configuration: 4 normally open (NO)
Control voltage: 230V AC
Mounting type: DIN rail
Design: Modular
How to use
The F&F ST25-40 should be installed by a qualified electrician in accordance with local electrical regulations. The device is designed to be snapped onto a standard 35mm DIN rail within an electrical distribution cabinet. Ensure that the power supply is disconnected before beginning the installation. Connect the control circuit wires to the designated coil terminals and the load circuit wires to the main power terminals, ensuring all connections are tightened to the specified torque to prevent overheating. Once installed, verify the operation by activating the control circuit to ensure the contacts engage correctly.
What to consider before purchase
Verify that the control voltage of your system matches the 230V AC requirement.
Ensure the total load of the connected equipment does not exceed the 25A rating.
Confirm that there is sufficient space on the DIN rail within your distribution board.
Check that the 4NO contact configuration meets the requirements of your specific application.
Usage recommendations
Regularly inspect the contactor for signs of wear or loose connections during routine maintenance of the electrical panel. Ensure the surrounding environment remains within the specified temperature range to maintain optimal performance and longevity of the device.

## FAQ

### How much does the F&F ST25-40 Modular Contactor 25A 4NO 230V AC cost, and is it available for purchase?

The price is 25.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 27 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 14.07.2026 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/12472542/68791845_large.webp