# SFP28 network transceiver BLUEOPTICS S4J91A-BO single-port 25Gbps, SFP28 form factor, compatible with HPE S4J91A

**URL:** https://aio.lv/en/product--blueoptics-s4j91a-bo--11646547
**Data updated:** 2026-02-25 16:41 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** BlueOptics
**Manufacturer code:** S4J91A-BO
**EAN:** 4063232347332
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 67.49 €
**Prices and availability valid until:** 2026-08-09 23:59
**Price without VAT (21%):** 55.78 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-s4j91a-bo--11646547

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.08.2026 | free |
| Pickup points | 12.08.2026 | 1.89 EUR |
| Courier delivery to door | 12.08.2026 | 4.99 EUR |

## Summary description

BLUEOPTICS S4J91A-BO is a compatible SFP28 network transceiver for 25Gbps Ethernet links. The single-port SFP28 module provides a 25Gbps uplink for switches, servers or network appliances and fits standard SFP28 ports. It is intended for expanding or replacing 25GbE interfaces in data centers and enterprise networks. The module supports plug-and-play installation for fast deployment of high-speed connections.

## Long description

BLUEOPTICS S4J91A-BO is a single-port SFP28 network transceiver designed for 25Gbps Ethernet links. The module fits into standard SFP28 ports and provides a 25Gbps uplink for switches, servers and network appliances. It is a compatible alternative for HPE S4J91A and is intended for expanding or replacing 25GbE interfaces in data center and enterprise environments. The transceiver supports plug-and-play installation to enable fast deployment of high-speed connections.
Advantages
This SFP28 module offers a compact form factor and low-power operation while delivering 25Gbps line-rate performance. Compatibility with common SFP28 slot designs ensures easy interchangeability when upgrading or replacing existing 25GbE interfaces. The plug-and-play capability simplifies installation without requiring additional configuration on supported devices. The module is suitable for high-density deployments due to its small footprint.
Suitable for
 Expanding 25GbE uplinks on Ethernet switches and routers
 High-speed server connections in rack and blade systems
 Interconnecting network appliances and storage systems
 Replacing existing SFP28 transceivers in data center infrastructures
Key specifications
 Interface type: SFP28 form factor, single-port
 Data rate: 25 Gbps per port
 Application: Short-range 25 Gigabit Ethernet links (depends on fiber/copper variant)
 Form factor compatibility: standard SFP28 ports used in switches, servers and network devices
 Installation: hot-pluggable plug-and-play module
 Power consumption: low-power SFP28 class (typical values depend on device)
How to use
Insert the BLUEOPTICS S4J91A-BO transceiver into a compatible SFP28 port on your switch, server or appliance until it clicks into place. Connect the appropriate fiber or copper cable to the module according to the chosen media type and route the cable to the remote device. The device should detect the transceiver automatically; verify the link status and data rate on the host device or management interface. To remove the module, depress the release mechanism on the port and gently pull the transceiver out.
Usage recommendations
Ensure the host device firmware and optics compatibility list support third-party SFP28 modules. Use the correct fiber type, cabling and transceiver variant for your required link distance and environment. Handle the transceiver by the housing, keep connectors capped when not in use, and follow electrostatic discharge (ESD) precautions during installation and removal.

## FAQ

### How much does the BLUEOPTICS S4J91A-BO SFP28 25Gbps transceiver cost, and is it available for purchase?

The price is 67.49 € (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 07.08.2026 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/11646547/66909160_large.webp