# BlueOptics QFX-Q-S-DAC-5M InfiniBand fibre optic cable QSFP28 4xSFP28 5m

**URL:** https://aio.lv/en/product--blueoptics-qfx-q-s-dac-5m-bl--4466204
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QFX-Q-S-DAC-5M-BL
**EAN:** 4063232642215
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 290.49 €
**Prices and availability valid until:** 2026-08-06 23:59
**Price without VAT (21%):** 240.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qfx-q-s-dac-5m-bl--4466204

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 04.08.2026 | free |
| Pickup points | 07.08.2026 | 1.89 EUR |
| Courier delivery to door | 07.08.2026 | 4.99 EUR |

## Summary description

The BlueOptics QFX-Q-S-DAC-5M is a 5-meter InfiniBand fibre optic cable featuring a QSFP28 connector on one end and four SFP28 connectors on the other. This cable is designed for high-speed data transmission in data centers and networking environments, providing reliable connectivity and performance. Its male-to-male configuration ensures easy installation and compatibility with various devices.

## Long description

The BlueOptics QFX-Q-S-DAC-5M InfiniBand fibre optic cable QSFP28 4xSFP28 5m is a 5‑metre direct attach cable with a QSFP28 plug on one end and four SFP28 plugs on the other. Designed for high‑density networking environments, it supports high‑speed data transmission between switches, servers and host adapters. The cable’s male‑to‑male configuration offers straightforward, tool‑free installation and is intended for short‑reach links within racks and between adjacent racks in data centres.
Advantages
This cable provides a compact connection solution that consolidates four SFP28 links into a single QSFP28 interface, reducing cabling complexity and saving rack space. It is suitable for low‑latency, high‑throughput environments and is built to industry connector form‑factors for broad compatibility with InfiniBand and Ethernet equipment that use QSFP28 and SFP28 interfaces. The 5‑metre length balances reach and signal integrity for typical in‑rack and top‑of‑rack deployments.
Suitable for
High‑speed server‑to‑switch or switch‑to‑switch interconnects in data centres
Top‑of‑rack and middle‑of‑row short‑reach links
High‑performance computing (HPC) clusters using InfiniBand or 100GbE breakouts
Environments requiring consolidation of four 25Gb/s lanes into one 100Gb/s QSFP28 port
Key specifications
Cable type: Direct attach cable with QSFP28 to 4×SFP28
Length: 5 metres
Connector configuration: one QSFP28 (male) to four SFP28 (male)
Supported protocols: InfiniBand and compatible high‑speed Ethernet breakouts (e.g., 100GbE via 4×25Gb/s lanes)
Use case: short‑reach, in‑rack and adjacent‑rack connections
How to use
Align the QSFP28 connector with the QSFP28 port and the SFP28 connectors with their respective SFP28 ports, then insert gently until each connector latches. Ensure devices are powered and ports are enabled according to the host equipment’s configuration. For breakout usage, configure the QSFP28 port on the switch or adapter to operate in 4×25Gb/s mode if required by the hardware and firmware. Avoid excessive bending or crushing of the cable during routing to maintain signal integrity.
Usage recommendations
Install the cable in environments with controlled airflow and secure the cable to prevent strain on connectors. Verify compatibility and required port modes with device documentation before deployment, and route the cable to minimize sharp bends and mechanical stress for reliable long‑term operation.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.25 kg |
| Cable length | 5 m |
| Data transfer rate | 100 Gbit/s |
| Product colour | Black |
| Connector 1 | QSFP28 |
| Connector 2 | 4xSFP28 |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand cable BlueOptics QFX-Q-S-DAC-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 04.08.2026 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

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