# Bistable Relay FF BIS-419 four-function DIN-rail TH 35mm

**URL:** https://aio.lv/en/product--ff-bis-419--12109238
**Data updated:** 2026-03-20 10:00 (EET)
**Category:** Home Automation
**Manufacturer:** FF
**Manufacturer code:** BIS-419
**EAN:** 5908312598046
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 31.99 €
**Prices and availability valid until:** 2026-07-31 23:59
**Price without VAT (21%):** 26.44 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-bis-419--12109238

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

FF BIS-419 is a bistable (latching) relay designed for mounting on a TH 35mm DIN rail. The four-function device provides latching relay operation with multiple control options and reduced power consumption for holding state. Suited for building automation, lighting control, and energy-saving switching where stable memory of contact position is required.

## Long description

FF BIS-419 is a bistable (latching) relay designed for installation on a TH 35mm DIN rail. The device integrates four-function bistable relay operation to maintain contact state without continuous coil energization, reducing power consumption during hold conditions. Intended for control panels and distribution cabinets, the BIS-419 supports common building automation and lighting control schemes where stable memory of contact position is required.
Advantages
The FF BIS-419 offers low holding power due to its latching design, which minimizes energy use after switching. Compact DIN-rail mounting and a standardized TH 35mm footprint simplify installation and panel layout. The four-function capability provides flexible control options for momentary, maintained, or pulse-triggered switching, and the relay’s construction is adapted for reliable operation in control and automation environments.
Suitable for
 Lighting circuits and lighting control panels
 Building automation and centralized control systems
 Energy-saving switching and load management
 Control cabinets and DIN-rail distribution boards
Key specifications
 Bistable (latching) relay operation for maintained contact state without continuous coil power
 Four-function control options providing versatile triggering modes
 DIN-rail mounting compatible with TH 35mm rails for compact installation
 Reduced holding power compared with continuous-coil relays
 Designed for use in building automation, lighting control, and control cabinets
How to use
Mount the unit on a TH 35mm DIN rail in a control cabinet or distribution board, ensuring secure mechanical fixation. Wire control and load circuits according to the system schematic and applicable wiring standards, taking care to isolate power before connections. Use the specified control inputs or switching commands to change the relay state; the device will maintain its contact position after the actuation signal ends. Verify correct operation with test actuations before final commissioning.
Usage recommendations
For reliable long-term performance, install the relay in an environment free of excessive vibration, dust, or moisture and observe the manufacturer’s temperature and electrical limits. Use proper wire cross-sections and tighten terminals to recommended torque values. When integrating into automation systems, plan control logic to take advantage of the bistable function for energy savings and to prevent undesired state changes after power interruptions.

## FAQ

### How much does the Bistable relay FF BIS-419 DIN-rail cost, and is it available for purchase?

The price is 31.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 20.07.2026 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/12109238/67645283_large.webp