# Buzzer unit PATLITE LR4-BU

**URL:** https://aio.lv/en/product--patlite-lr4-bu--3152067
**Data updated:** 2026-01-13 17:39 (EET)
**Category:** Printer & Copier Parts
**Manufacturer:** Patlite
**Manufacturer code:** LR4-BU
**EAN:** 4938766016200
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 41.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 34.29 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--patlite-lr4-bu--3152067

## 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 | 1.99 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The PATLITE LR4-BU is a reliable buzzer unit designed for various applications. It operates on a DC power source with an output voltage of 24 V. With a diameter of 4 cm, it is compact yet powerful, functioning effectively in temperatures ranging from -20 to 50 °C and humidity levels of 0 to 90%. This unit is compatible with PATLITE products, ensuring seamless integration into your systems.

## Long description

The PATLITE LR4-BU is a compact buzzer unit designed for signal and alert applications in industrial and commercial environments. It operates from a 24 V DC supply and provides audible alerts from a housing with a 4 cm diameter. The unit is built to function across a wide ambient temperature range and tolerate relative humidity up to 90%, making it suitable for many indoor locations where space is limited and reliable acoustic signaling is required.
Advantages
The LR4-BU offers a small footprint and straightforward electrical requirements, allowing easy integration with existing control panels and PATLITE signaling modules. Its operating temperature and humidity tolerances contribute to consistent performance in typical factory and facility environments. The buzzer’s focused design reduces installation complexity while providing clear audible indication for alarms, status notifications, or process signals.
Suitable for
 Machine status indication and fault alarms
 Control panels and operator stations with limited space
 Production lines and assembly stations requiring audible alerts
 Maintenance and testing setups for signaling events
Key specifications
 Power supply: 24 V DC
 Diameter: 4 cm
 Operating temperature range: -20 °C to 50 °C
 Relative humidity tolerance: 0% to 90% (non-condensing)
 Compatibility: designed for integration with PATLITE signal devices
How to use
Install the LR4-BU according to standard electrical safety practices, ensuring a secure mechanical mounting and proper connection to a 24 V DC source. Confirm polarity and wiring continuity before energizing. Position the buzzer where the sound will not be obstructed and where ambient conditions fall within the specified temperature and humidity ranges. Integrate the unit into control circuits or signaling systems so that it is activated by the appropriate alarm or status outputs.
Usage recommendations
Regularly verify electrical connections and mounting integrity. Avoid exposure to liquid immersion or environments with persistent condensation. For best performance, test the buzzer periodically as part of routine maintenance procedures and ensure sound levels remain adequate for the intended workspace.

## Specifications

| Feature | Value |
|---|---|
| Type | Buzzer unit |
| Certification | UL 508, CSA-C22.2 No.14
FCC 15 B A
RoHS (EN 50581)
EMC (EN 61000-6-4, EN 61000-6-2)
KC (KN 61000-6-4, KN 61000-6-2)
IEC/EN 60947-5-1, EN62471 |
| Operating relative humidity (H-H) | 0 - 90 |
| Operating temperature (T-T) | -20 - 50 |
| Power source | DC |
| Output voltage | 24 |
| Product colour | Silver |
| Diameter | 40 mm |
| International Protection (IP) code | IP65 |
| Brand compatibility | PATLITE |
| Quantity per pack | 1 pc(s) |
| Sustainability certificates | RoHS |

## FAQ

### How much does the Buzzer unit PATLITE LR4-BU cost, and is it available for purchase?

The price is 41.49 € (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 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. 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 Patlite 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 Patlite 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/3152067/58261790_large.webp