# BlueOptics DAC-Q28-S28-5M InfiniBand fibre optic cable QSFP28 4x SFP28 5m

**URL:** https://aio.lv/en/product--blueoptics-dac-q28-s28-5m-bl--4470677
**Data updated:** 2026-02-25 16:35 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** DAC-Q28-S28-5M-BL
**EAN:** 4063232642208
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 290.49 €
**Prices and availability valid until:** 2026-08-14 23:59
**Price without VAT (21%):** 240.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-dac-q28-s28-5m-bl--4470677

## 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

The BlueOptics DAC-Q28-S28-5M is a 5m InfiniBand fibre optic cable featuring a QSFP28 connector on one end and 4x SFP28 connectors on the other. This cable is designed for high-speed data transmission in data centers and networking environments, ensuring reliable connectivity and performance. Its male-to-male configuration makes it easy to connect various devices seamlessly.

## Long description

The BlueOptics DAC-Q28-S28-5M InfiniBand fibre optic cable QSFP28 4x SFP28 5m is a direct-attach cable designed for short-range, high-bandwidth connections in modern data center and networking setups. One end of the cable terminates in a QSFP28 plug while the opposite end provides four SFP28 plugs, enabling a single QSFP28 port to connect to four SFP28 ports without transceivers. The 5-metre length supports flexible rack-to-rack and within-rack installations where reliable, low-latency links are required.
Advantages
This passive cable provides a compact, low-power alternative to optical transceivers and patch cords, reducing equipment and operating costs. The QSFP28 to 4x SFP28 breakout format allows consolidation of high-density switch ports and simplifies cabling topology. Engineered for high signal integrity and stable throughput, the cable supports consistent InfiniBand performance and minimizes signal loss and crosstalk in short-distance connections.
Suitable for
Top-of-rack and spine-leaf connections in data centers
High-performance computing (HPC) clusters using InfiniBand fabrics
Server-to-switch and switch-to-switch breakout links
Network equipment lab testing and staging environments
Key specifications
Connector type: QSFP28 plug on one end and four SFP28 plugs on the other
Length: 5 metres
Cable type: Direct Attach Copper/Passive or Active Cable form factor compatible with InfiniBand QSFP28/SFP28 ecosystems
Supported interface: InfiniBand / 100GbE breakout compatible with QSFP28 and SFP28 ports
Deployment: Short-reach, within-rack and adjacent-rack connections
How to use
Ensure both devices support the QSFP28 and SFP28 direct-attach cable configuration and that the ports are powered down or set to a safe state before insertion. Insert the QSFP28 end into the corresponding QSFP28 port until the latch engages, then insert each SFP28 plug into the target SFP28 ports. Verify link status via device LEDs or management interfaces and bring ports online according to your network configuration. For removal, release the latch mechanisms and pull straight out to avoid damaging the connectors.
Usage recommendations
Use the cable for short-distance, high-bandwidth connections where low latency and reduced power draw are priorities. Avoid tight bends and excessive mechanical stress; maintain the manufacturer’s minimum bend radius and keep connectors protected from dust when not in use. Confirm compatibility with switch and server vendor compatibility lists to ensure proper operation in InfiniBand or 100GbE breakout configurations.

## Specifications

| Feature | Value |
|---|---|
| Cable length | 5 m |
| Data transfer rate | 100 Gbit/s |
| Product colour | Black |
| Connector 1 | QSFP28 |
| Connector 2 | 4x SFP28 |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand cable BlueOptics DAC-Q28-S28-5M cost, and is it available for purchase?

The price is 290.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 21 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

https://aio.lv/img/cache/product/4470677/64300532_large.webp