# SFP28 25G Fiber Optic Transceiver CBO SFP28-25G-ESR BO27Q856S3D — 25 Gigabit Ethernet, SFP28 form factor

**URL:** https://aio.lv/en/product--blueoptics-sfp28-25g-esr-so-bo--4469571
**Data updated:** 2026-02-25 16:34 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** BlueOptics
**Manufacturer code:** SFP28-25G-ESR-SO-BO
**EAN:** 4063232073163
**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-so-bo--4469571

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 11.08.2026 | free |
| Pickup points | 14.08.2026 | 1.89 EUR |
| Courier delivery to door | 14.08.2026 | 4.99 EUR |

## Summary description

CBO SFP28-25G-ESR BO27Q856S3D is a 25 Gigabit Ethernet SFP28 fiber optic transceiver designed for high-speed data links. It provides a compact SFP28 form factor for compatibility with switches and servers supporting 25G ports. Suitable for data centers and enterprise networks, it enables low-latency 25G connectivity over fiber, simplifying upgrades and scaling of network bandwidth.

## Long description

CBO SFP28-25G-ESR BO27Q856S3D is a 25 Gigabit Ethernet SFP28 fiber optic transceiver in a compact SFP28 form factor designed for high-speed uplinks and server connections. It supports 25Gbase operation over single-mode fiber and is intended for use in switches, routers and network interface cards that accept SFP28 modules. The module delivers low-latency, high-throughput connectivity for data center fabrics and enterprise aggregation layers while preserving slot density in modern network equipment.
Advantages
The transceiver offers a standardized SFP28 footprint for easy hot-plug installation and broad compatibility with 25G-capable hardware. It provides stable 25 Gigabit Ethernet performance with low power consumption and a small form factor that helps maintain high port density. Designed for fiber links, the module supports reliable long-reach connections and consistent signal integrity for demanding network environments.
Suitable for
25G uplinks between switches and aggregation devices
Server connections to 25G network interface cards (NICs)
Data center leaf-spine fabrics requiring low-latency links
Enterprise campus backbones and high-bandwidth distribution
Fiber-based access and metro connections where 25G is required
Key specifications
Interface: SFP28 form factor
Data rate: 25 Gigabit Ethernet
Medium: Single-mode fiber (optical)
Transmission type: Duplex fiber
Typical power consumption: low-power SFP28 class (device dependent)
Operating temperature: commercial range suitable for standard networking equipment
How to use
Install the module into an empty SFP28 port on a compatible switch, router or server NIC while the host device is powered on or off according to the equipment manual. Connect single-mode duplex fiber patch cables to the TX and RX ports, ensuring correct polarity. Verify link status and speed on the host device’s management interface; the module will negotiate 25G operation with a compatible remote port. Monitor optical power and link health through the host system or management tools as part of routine network maintenance.
Usage recommendations
Use manufacturer-recommended fiber types and patch cords, maintain correct fiber polarity, and avoid sharp bends or excessive stress on fibers. Ensure that the host device firmware and drivers support SFP28 25G modules. For long-term reliability, perform periodic checks of optical power levels and environmental conditions in the equipment rack.

## FAQ

### How much does the CBO SFP28-25G-ESR 25G SFP28 transceiver 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 11.08.2026 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

https://aio.lv/img/cache/product/4469571/59876425_large.webp