# F&F Modular Contactor ST25-31, 25A, 3NO+1NC

**URL:** https://aio.lv/en/product--ff-st25-31--12454500
**Data updated:** 2026-05-18 02:49 (EEST)
**Category:** Power Sockets
**Manufacturer:** FF
**Manufacturer code:** ST25-31
**EAN:** 5908312594147
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 32.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 27.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-st25-31--12454500

## 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 ST25-31 is a modular contactor designed for reliable electrical circuit switching. It features a 25A rated current and a 3NO+1NC contact configuration, making it suitable for industrial and residential automation systems. This compact device ensures efficient control of lighting, heating, and motor circuits, providing high operational safety and durability in standard DIN-rail mounting applications.

## Long description

The F&F ST25-31 is a high-performance modular contactor engineered for the reliable switching of electrical circuits in both residential and industrial environments. Designed for seamless integration into standard distribution boards, this device provides a robust solution for managing power distribution with a rated current of 25A. Its configuration includes three normally open (NO) contacts and one normally closed (NC) contact, offering versatile control options for various electrical loads.
Advantages
This modular contactor stands out due to its compact design, which saves valuable space on DIN-rail mounting systems. It is built to withstand frequent switching operations, ensuring long-term durability and consistent performance in demanding automation tasks. The device operates with high electrical safety standards, minimizing the risk of failure in critical control circuits. Its straightforward installation process makes it an efficient choice for both professional electricians and system integrators looking for a dependable switching component.
Suitable for
Lighting control systems in commercial and residential buildings
Heating and ventilation equipment management
Motor control circuits for small machinery
General automation and power distribution tasks
When it may not be suitable
This contactor is not intended for high-voltage industrial applications exceeding its rated current capacity. It should not be used in environments with extreme moisture, dust, or corrosive gases unless housed in an appropriate protective enclosure.
Key specifications
Rated current: 25A
Contact configuration: 3NO + 1NC
Mounting type: DIN-rail
Application: Modular electrical systems
How to use
The F&F ST25-31 is designed for installation on 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 coil terminals and the load circuit wires to the corresponding NO and NC power terminals according to the wiring diagram provided on the device housing. Once installed, verify that all connections are secure and that the contactor operates correctly under load conditions.
What to consider before purchase
Verify that the 25A rated current is sufficient for your specific load requirements
Ensure the 3NO+1NC contact configuration matches your control logic
Confirm that there is adequate space on your DIN rail for the module
Check that the operating voltage of the control coil is compatible with your system
Usage recommendations
For optimal longevity and safety, ensure the contactor is installed in a well-ventilated enclosure to prevent overheating. Regularly inspect the terminal connections for tightness and signs of wear during routine maintenance of your electrical system.

## FAQ

### How much does the F&F ST25-31 Modular Contactor 25A 3NO+1NC cost, and is it available for purchase?

The price is 32.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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/12454500/68756927_large.webp