# FF automatic phase changeover switch PF-431 16A 3x230V+N

**URL:** https://aio.lv/en/product--ff-pf-431--12109491
**Data updated:** 2026-03-20 10:00 (EET)
**Category:** Power Sockets
**Manufacturer:** FF
**Manufacturer code:** PF-431
**EAN:** 5908312594024
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 69.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 57.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-pf-431--12109491

## 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

Automatic phase changeover switch FF PF-431 is a 16A device designed for three-phase installations with neutral (3x230V+N). It monitors supply phases and automatically switches between them to maintain power continuity. Suitable for protecting single-phase loads fed from a multi-phase network, backup power transfer and preventing outages in residential or light commercial electrical systems.

## Long description

The FF automatic phase changeover switch PF-431 16A 3x230V+N monitors three supply phases with neutral and automatically transfers a single-phase load to an available phase to maintain continuous power. Designed for installations where single-phase equipment is fed from a multi-phase network, this 16A changeover switch detects phase loss or voltage irregularities and connects the load to an alternative healthy phase without manual intervention. The compact module is intended for mounting in distribution boards and for use in residential or light commercial electrical systems.
Advantages
The device provides automatic and rapid transfer between phases to minimize interruptions to connected equipment. It supports three-phase systems with neutral and operates within the rated current of 16A, offering straightforward protection for single-phase loads. The switch’s automatic monitoring reduces the need for manual intervention and helps prevent downtime caused by individual phase failures. Installation into standard distribution enclosures is possible due to its compact form factor.
Suitable for
Protecting single-phase appliances and circuits supplied from a three-phase network with neutral
Automatic backup phase transfer where uninterrupted power is important for lights, pumps, or control systems
Small commercial or residential distribution boards requiring phase-failure protection
Key specifications
Rated current: 16 A
Supply configuration: three phases with neutral (3x230V+N)
Type: automatic phase changeover/phase failure switching device
Function: phase monitoring and automatic transfer to healthy phase
Mounting: intended for installation in electrical distribution boards
How to use
Mount the changeover switch in the distribution board according to local electrical regulations and wiring diagrams. Connect the three incoming phase conductors and neutral to the device’s input terminals and the outgoing load conductor to the output terminal following the manufacturer’s terminal labeling. After correct wiring and power-up, the module continuously monitors phase voltages and will automatically transfer the load to an available phase if the active phase fails or its voltage drops outside acceptable limits. No regular operator action is required during normal operation.
Usage recommendations
Install and commission the unit only by a qualified electrician. Verify compatibility with load current and the distribution board’s wiring. Use appropriate circuit protection (breakers or fuses) upstream of the changeover switch and follow local standards for earthing and protection. Periodically inspect connections and the device for signs of wear or overheating as part of routine electrical maintenance.

## FAQ

### How much does the FF PF-431 automatic phase changeover switch 16A cost, and is it available for purchase?

The price is 69.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 720 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

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