# Impulse Relay FF Przekaźnik impulsowy I model BIS-403, single-channel switching relay

**URL:** https://aio.lv/en/product--ff-bis-403--10661037
**Data updated:** 2026-03-20 09:46 (EET)
**Category:** Network Switches
**Manufacturer:** FF
**Manufacturer code:** BIS-403
**EAN:** 5908312594086
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 27.49 €
**Prices and availability valid until:** 2026-07-10 23:59
**Price without VAT (21%):** 22.72 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-bis-403--10661037

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

FF Przekaźnik impulsowy I (model BIS-403) is an impulse switching relay designed for control of lighting and other electrical circuits. As a compact single-channel relay, it provides momentary input control to toggle outputs, suitable for wall switches, automation panels and retrofit installations where pulse-controlled switching is required.

## Long description

FF Impulse Relay I (model BIS-403) is a compact single-channel impulse switching relay designed to control lighting and other electrical circuits. It converts a momentary input pulse into a change of output state, allowing a single push-button or external control signal to toggle connected loads. The unit is intended for DIN-rail mounting or installation in distribution boards and retrofit situations where pulse-controlled switching simplifies wiring and user interaction.
Advantages
The device offers compact dimensions and single-channel operation that reduce space requirements and simplify integration into existing electrical installations. Its impulse toggle function eliminates the need for mechanical latching switches and enables centralized or remote control using momentary inputs. The relay is suitable for frequent switching cycles and is compatible with standard AC mains circuits, providing reliable operation for lighting and other resistive or inductive loads within its rated parameters.
Suitable for
Control of domestic and commercial lighting from momentary switches
Retrofit upgrades where push-button control replaces multi-wire switches
Integration into automation panels for timed or remote toggling of circuits
Centralized on/off control of circuits in corridors, staircases, or common areas
Key specifications
Single-channel impulse (toggle) switching function
Designed for mounting in distribution boards or on DIN-rail
Compatible with standard AC mains voltage and common lighting loads
Momentary input control (push-button or pulse signal) to change output state
Compact form factor suitable for confined installation spaces
How to use
Install the impulse relay in a suitable electrical enclosure or on a DIN-rail according to local electrical codes. Connect the mains supply and the load terminals following the wiring diagram provided with the unit; connect the momentary input switch or pulse source to the designated control input. A brief press of the input will toggle the relay output between on and off states. Ensure power is isolated before wiring and verify correct polarity and connections prior to energizing the circuit.
Usage recommendations
Choose a control switch rated for momentary operation and position the relay inside an accessible distribution board. Verify load type and total current to ensure compatibility with the relay's switching capacity, and follow local safety regulations for installation and earthing. For automated systems, combine the impulse relay with timers or remote controllers that provide short control pulses rather than sustained signals.

## FAQ

### How much does the Impulse Relay FF BIS-403 cost, and is it available for purchase?

The price is 27.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 35 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 02.07.2026 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/10661037/57069660_large.webp