# InfiniBand/fibre optic cable BlueOptics 844480-B21-BL 5 m SFP28 Male/Male

**URL:** https://aio.lv/en/product--blueoptics-844480-b21-bl--5038645
**Data updated:** 2026-03-07 15:11 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** 844480-B21-BL
**EAN:** 4063232100388
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 114.49 €
**Prices and availability valid until:** 2026-08-09 23:59
**Price without VAT (21%):** 94.62 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-844480-b21-bl--5038645

## 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

The BlueOptics 844480-B21-BL is a 5 m InfiniBand/fibre optic cable featuring SFP28 connectors on both ends. It offers reliable data transmission and is ideal for high-speed networking applications.

## Long description

The BlueOptics 844480-B21-BL is a 5 m InfiniBand / fibre optic style direct attach cable with SFP28 connectors on both ends. Designed for short-range, high-speed interconnects in rack and adjacent-rack environments, this 25G-capable twinax copper direct attach cable (DAC) provides a straightforward physical link between SFP28 ports on switches, routers, storage systems and compatible host adapters. The cable follows MSA-compliant SFP28 connector form factor and supports electrical 25GBase-CR signalling over a 5 metre distance, enabling reliable data transmission for Ethernet, FCoE, Fibre Channel and InfiniBand applications where the connected hardware supports passive DAC operation.
Advantages
This 5 m SFP28 Male–Male cable offers a low-latency, low-power connection with passive twinax copper construction suitable for short links within or between racks. It is manufactured to MSA standards and assembled from high-quality components to ensure consistent signal integrity and long service life. The passive design eliminates active transceiver electronics in the cable, reducing heat and power consumption and simplifying installation in dense data centre deployments.
Suitable for
 High-speed 25G links between switches in the same rack or neighbouring racks
 Direct connections between servers and storage systems with SFP28 ports
 Ethernet, FCoE, Fibre Channel and InfiniBand short-reach interconnects up to 25 Gbps
 Environments requiring cost-effective, power-efficient cabling for predictable short distances
Key specifications
 Cable length: 5 metres
 Connector type: SFP28 male to SFP28 male
 Transmission: Passive twinax copper supporting 25GBase-CR
 Applicable protocols: Ethernet, FCoE, Fibre Channel, InfiniBand (up to 25 Gbps over 5 m)
 Wire gauge: 30 AWG (typical for twinax DAC)
 Form factor: MSA-compliant SFP28
How to use
Install the cable by inserting each SFP28 connector into the corresponding SFP28 port on your network devices until the latch engages. Ensure both devices officially support passive 25GBase-CR direct attach cables and that firmware or software restrictions do not prevent use of third-party DACs. Route the cable to avoid sharp bends and mechanical strain; maintain the minimum bend radius recommended for twinax cables. For best results, connect devices while powered down or follow your equipment vendor’s hot-plug guidelines.
Usage recommendations
Verify device compatibility with passive SFP28 DACs before deployment and test the link in your environment. For installations in dense racks consider cable routing and strain relief to prevent connector stress. Use this 5 m passive SFP28 DAC for short, fixed links where low latency and low power consumption are priorities.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.08 kg |
| Package weight | 90 g |
| Cable length | 5 m |
| Data transfer rate | 25 Gbit/s |
| Product colour | Black |
| Connector 1 | SFP28 |
| Connector 2 | SFP28 |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand/fibre optic cable BlueOptics 844480-B21-BL cost, and is it available for purchase?

The price is 114.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 220 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/5038645/64337311_large.webp