# Fiber optic SFP28 transceiver CBO 845398-B21 25 Gbps, multimode OM3/OM4 compatible, up to 100 m

**URL:** https://aio.lv/en/product--blueoptics-845398-b21-bo--4466961
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** BlueOptics
**Manufacturer code:** 845398-B21-BO
**EAN:** 4063232048178
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 58.99 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 48.75 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-845398-b21-bo--4466961

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 27.07.2026 | free |
| Pickup points | 30.07.2026 | 1.89 EUR |
| Courier delivery to door | 30.07.2026 | 4.99 EUR |

## Summary description

CBO 845398-B21 is an SFP28 fiber optic transceiver module with 25 Gbit/s data rate and a reach of up to 100 m over multimode fiber. Designed for high‑density 25 Gigabit Ethernet and compatible networking equipment, it provides reliable short‑range connectivity for data centers, aggregation switches and server interfaces. Hot‑pluggable form factor enables easy installation and replacement.

## Long description

CBO 845398-B21 is a 25 Gbps SFP28 fiber optic transceiver designed for short-range multimode links. The module supports transmission over OM3 and OM4 multimode fiber with a maximum reach of up to 100 meters, and it fits standard hot-pluggable SFP28 ports used in 25 Gigabit Ethernet switches, routers and server network interfaces. The compact form factor enables high-density deployments in data center top-of-rack, aggregation and access-layer equipment while maintaining low power consumption and straightforward field replacement.
Advantages
The transceiver offers a reliable 25 Gbit/s data rate with multimode fiber compatibility for OM3 and OM4, ensuring interoperability with common data center cabling. Its hot-pluggable SFP28 form factor simplifies installation and maintenance without powering down equipment. The design emphasizes short-range performance up to 100 m, making it suitable for typical rack-to-rack connections while providing stable optical characteristics and compatibility with existing 25G infrastructure.
Suitable for
Short-range 25 Gigabit Ethernet connections in data centers
Rack-to-rack and within-rack multimode fiber links
Aggregation switches, top-of-rack switches and server NIC interfaces
Environments using OM3 or OM4 multimode cabling
Key specifications
Interface: SFP28 hot-pluggable module
Data rate: 25 Gbit/s
Fiber type: Multimode (OM3 / OM4)
Maximum reach: Up to 100 meters over OM3/OM4
Duplex: LC connector, duplex multimode link
Typical power consumption: optimized for low power in high-density applications
Application: 25 Gigabit Ethernet networking
How to use
Insert the SFP28 transceiver into a compatible SFP28 port on a switch, router or server NIC while the host device is powered on; the hot-pluggable design allows insertion and removal without shutting down equipment. Connect duplex multimode fiber using LC connectors and ensure fiber polarity is correct. Verify link status through the host device management interface and confirm that the port is configured for 25 Gbit/s operation. For best results, use OM3 or OM4 multimode patch cords and maintain clean connector endfaces to avoid signal loss.
Usage recommendations
Use this transceiver in short-range multimode installations where 25 Gbit/s performance is required. Keep fiber connectors clean and use proper dust caps when not connected. Match the transceiver to the host port's supported speeds and optical type, and verify compatibility with the networking equipment vendor if specific interoperability lists are required.

## FAQ

### How much does the Fiber optic SFP28 transceiver CBO 845398-B21 cost, and is it available for purchase?

The price is 58.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4489 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 27.07.2026 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

https://aio.lv/img/cache/product/4466961/59852611_large.webp