# Transceiver BlueOptics QSFP 25G 850nm model BO25KS856S3D by BlueOptics

**URL:** https://aio.lv/en/product--blueoptics-407-bdfx-bo--11467707
**Data updated:** 2026-02-25 16:41 (EET)
**Category:** Network Media Converters
**Manufacturer:** BlueOptics
**Manufacturer code:** 407-BDFX-BO
**EAN:** 4063232342832
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 361.99 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 299.17 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-407-bdfx-bo--11467707

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.89 EUR |
| Courier delivery to door | 29.07.2026 | 4.99 EUR |

## Summary description

QSFP transceiver BlueOptics BO25KS856S3D provides 25G connectivity using 850 nm wavelength. Designed for high-speed short-range links, it fits QSFP form-factor ports and is suitable for data center uplinks, switches and server connections. The module enables reliable 25 Gigabit transmission, simplifying upgrades and maintaining compatibility with QSFP ports.

## Long description

The Transceiver BlueOptics QSFP 25G 850nm model BO25KS856S3D by BlueOptics is a compact optical module designed for 25 Gigabit Ethernet short-range links. The module uses an 850 nm wavelength and a QSFP form factor to provide high-speed connectivity between switches, servers and data center uplinks. It is intended for environments where reliable 25G performance and compatibility with QSFP ports are required, supporting straightforward upgrades from lower-rate interfaces without changing existing port hardware.
Advantages
The BlueOptics BO25KS856S3D delivers 25G transmission over multimode fiber with an 850 nm VCSEL source, offering consistent data throughput and low latency for short distances. Its QSFP form factor enables hot-pluggable installation in standard QSFP ports and simplifies module replacement. The design focuses on interoperability with common switch and server optics, helping maintain link stability while minimizing configuration complexity.
Suitable for
Data center top-of-rack and leaf-spine uplinks requiring 25G short-range links
Server-to-switch connections within the same equipment room
Switch-to-switch links over multimode fiber for campus or rack-level deployments
Network upgrades from 10G to 25G where QSFP ports are available
Key specifications
Operational speed: 25 Gigabit per second
Wavelength: 850 nm (multimode)
Form factor: QSFP (Quad Small Form-factor Pluggable)
Application range: short-reach multimode fiber links
Connector type: MPO/MTP-compatible optical interface for QSFP multimode modules
How to use
Install the transceiver into a compatible QSFP port on a switch or server while the host device is powered according to the vendor's hot-plug guidelines. Connect the multimode fiber patch cable with the matching MPO/MTP connector between devices, ensuring proper polarity and fiber cleanliness. After physical installation, verify link status through the host device management interface and monitor optical parameters such as receive/transmit levels and error statistics to confirm correct operation.
Usage recommendations
Use certified multimode fiber (OM3/OM4) for reliable 25G short-reach performance and inspect fiber endfaces before connection. Follow the network equipment vendor’s compatibility list and firmware guidance when integrating third-party optical modules to ensure interoperability and support.

## FAQ

### How much does the BlueOptics QSFP 25G 850nm BO25KS856S3D cost, and is it available for purchase?

The price is 361.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 12 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 24.07.2026 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

## Image

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