# Network transceiver module BlueOptics BO25K859S3D-BO 40 Mbit/s QSFP

**URL:** https://aio.lv/en/product--blueoptics-bo25k859s3d-bo--6188624
**Data updated:** 2026-03-07 15:15 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** BlueOptics
**Manufacturer code:** BO25K859S3D-BO
**EAN:** 4063232052731
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 119.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 98.75 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-bo25k859s3d-bo--6188624

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

The BlueOptics BO25K859S3D-BO is a QSFP network transceiver module with a maximum data transfer rate of 40 Mbit/s. It features an LC fiber optic connector and is available in cream and grey colors. Weighing 40 g, it is designed for efficient data transmission in networking applications.

## Long description

The BlueOptics BO25K859S3D-BO is a QSFP network transceiver module engineered for point-to-point fiber connections and high-density networking equipment. With a maximum data transfer rate of 40 Mbit/s and an LC fiber optic connector, this compact module supports straightforward integration into compatible switches and routers. Its small form factor and lightweight construction (40 g) make it suitable for installations where space and weight are considerations. The module is available in cream and grey finishes to match various equipment aesthetics.
Advantages
The module provides a standardized QSFP interface for interoperability with network hardware that accepts QSFP form-factor transceivers. Its LC connector ensures compatibility with commonly used single- and multi-mode fiber patching infrastructure. At 40 Mbit/s, the transceiver is designed for moderate bandwidth links where reliable fiber connectivity is required. The unit’s low weight and compact size simplify handling and mounting in rack or chassis environments.
Suitable for
 Fiber optic links between switches and routers in small to medium networks
 Backup or auxiliary uplink connections where moderate bandwidth is sufficient
 Environments requiring QSFP form-factor modules for modular chassis or transceiver cages
 Installations where lightweight, compact transceivers improve density and airflow
Key specifications
 Interface type: QSFP
 Maximum data transfer rate: 40 Mbit/s
 Connector type: LC fiber optic
 Product colour: cream and grey options
 Weight: 0.04 kg
How to use
Install the transceiver into a compatible QSFP slot on your network device following the device manufacturer’s guidance for hot-plugging or shut-down procedures. Connect the LC-terminated fiber cable to the transceiver’s LC connector, ensuring proper polarity and secure mating. After physical installation, verify link status through the network device’s management interface and configure the port for the intended data rate and duplex settings if required. Handle the module using antistatic precautions and keep protective dust caps on the connector when not in use.
Usage recommendations
Use the BlueOptics BO25K859S3D-BO in systems that support QSFP transceivers and LC fiber connections. Ensure fiber type (single-mode or multi-mode) and connector polarity match the network design. For consistent performance, maintain clean connector endfaces and follow manufacturer guidelines for insertion/removal and environmental operating conditions.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Interface type | QSFP |
| Maximum data transfer rate | 40 Mbit/s |
| Wavelength | 850 nm |
| Fiber optic connector | LC |
| Rx wavelength (min) | 850 nm |
| Tx wavelength (min) | 850 nm |
| Multi-mode fiber (MMF) supported | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.04 kg |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 50 g |
| Number of products included | 1 pc(s) |

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | 0 - 70 |

### Features

| Feature | Value |
|---|---|
| Product colour | Cream colour, Grey |

## FAQ

### How much does the Network transceiver module BlueOptics BO25K859S3D-BO cost, and is it available for purchase?

The price is 119.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 86 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 23.07.2026 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 BlueOptics 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 BlueOptics 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: interface type, maximum data transfer rate, weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/6188624/54616671_large.webp