# SFP28 fiber optic transceiver CBO BO27Q856S3D 25G ESR module

**URL:** https://aio.lv/en/product--blueoptics-sfp28-25g-esr-ee-bo--4469542
**Data updated:** 2026-02-25 16:34 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** BlueOptics
**Manufacturer code:** SFP28-25G-ESR-EE-BO
**EAN:** 4063232073484
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 65.99 €
**Prices and availability valid until:** 2026-08-13 23:59
**Price without VAT (21%):** 54.54 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfp28-25g-esr-ee-bo--4469542

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 12.08.2026 | free |
| Pickup points | 17.08.2026 | 1.89 EUR |
| Courier delivery to door | 17.08.2026 | 4.99 EUR |

## Summary description

CBO SFP28 BO27Q856S3D is a 25G ESR fiber optic transceiver module designed for high-speed 25 Gigabit Ethernet links. The small form-factor pluggable (SFP28) unit provides a compact interface for optical uplinks and switch-to-switch connections. Intended for data center and enterprise network use, it supports reliable short-to-medium reach optical transmission and simple hot-swappable installation.

## Long description

The BlueOptics SFP28 BO27Q856S3D 25G ESR module is a compact fiber optic transceiver designed for 25 Gigabit Ethernet links. This SFP28-form factor unit provides a small, hot-pluggable interface for switch-to-switch connections and optical uplinks in data center and enterprise networks. It supports short-to-medium reach multimode or single-mode optical transmission (ESR class) and is intended for reliable, high-speed connectivity where space and port density are important.
Advantages
The SFP28 fiber optic transceiver offers a compact footprint and hot-swappable operation for minimal downtime during installation or replacement. Its 25G data rate supports high-throughput applications, while ESR optical reach covers common intra-data-center and campus links. The module is compatible with industry-standard SFP28 ports, enabling straightforward integration with compatible switches and optical equipment without requiring chassis changes.
Suitable for
 25 Gigabit Ethernet uplinks between switches and routers
 Server-to-switch high-speed connections in data centers
 Optical links within enterprise and campus networks
 Port density upgrades where SFP28 form factor is required
Key specifications
 Form factor: SFP28 small form-factor pluggable
 Data rate: 25 Gigabit Ethernet
 Optical reach: Extended short reach (ESR) for short-to-medium links
 Interface: Optical fiber (compatible with standard SFP28 ports)
 Hot-pluggable design for tool-free installation
 Compact dimensions suitable for high port density switches
How to use
Install the transceiver into an available SFP28 port on a compatible switch, router, or host adapter while the device is powered on or off according to the equipment vendor's guidance. Connect the optical fiber patch cable to the module's optical interface, ensuring correct fiber type and connector polarity. Verify link status on the network device and configure interface parameters such as speed and auto-negotiation if required. For replacement, remove the module by disengaging the latch and pulling straight out, then insert the new module until it seats securely.
Usage recommendations
Use certified fiber cabling and compatible connectors to maintain signal integrity and meet the expected ESR reach. Verify hardware compatibility with the switch vendor's supported transceiver list and update device firmware if necessary. Handle the optical interface with dust caps when not connected and avoid touching the fiber endface to prevent contamination.

## FAQ

### How much does the SFP28 transceiver CBO BO27Q856S3D 25G cost, and is it available for purchase?

The price is 65.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 717 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 12.08.2026 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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