# BlueOptics QSFP28-DAC-0.5M-AT-BL InfiniBand/fibre optic cable 0.5m Male/Male

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-at-bl--4466735
**Data updated:** 2026-02-24 11:00 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-0.5M-AT-BL
**EAN:** 4063232100418
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 105.49 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 87.18 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-at-bl--4466735

## 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

The BlueOptics QSFP28-DAC-0.5M-AT-BL is a high-performance InfiniBand/fibre optic cable designed for efficient data transmission. With a length of 0.5 meters and Male/Male QSFP28 connectors, it ensures reliable connectivity for high-speed networking applications. Ideal for data centers and enterprise networks, this cable offers durability and excellent signal integrity.

## Long description

The BlueOptics QSFP28-DAC-0.5M-AT-BL is a 0.5 meter QSFP28 Direct Attach Cable (DAC) designed for short-reach high-speed connections in data centres and enterprise networks. This passive twinax copper cable features QSFP28 male connectors on both ends and supports up to 100G data rates using the 100GBase-CR4 electrical interface and InfiniBand protocols where supported. The cable is MSA-compliant and intended for connecting switches, routers, storage systems and other hardware within the same rack or between adjacent racks.
Advantages
The cable provides a low-latency, low-power and cost-effective connectivity option for high-density installations. Passive twinax construction eliminates active components in the cable itself, reducing power consumption and points of failure. MSA compliance and tested componentry ensure interoperability with major networking platforms that support QSFP28 DAC modules. The short 0.5 m length simplifies rack cabling and reduces signal attenuation for reliable 100G links over short distances.
Suitable for
100G short-reach connections between switches and routers within the same rack
Interconnects for storage systems and high-performance computing (HPC) nodes
InfiniBand and Ethernet applications up to 100G where QSFP28 passive DACs are supported
High-density data centre top-of-rack (ToR) cabling
Key specifications
Connector type: QSFP28 male to QSFP28 male
Length: 0.5 meter
Data rate: up to 100 Gbit/s (100GBase-CR4 compatible)
Cable type: passive twinax copper (30 AWG)
Standards: QSFP MSA compliant, suitable for Ethernet, FCoE, Fibre Channel and InfiniBand applications up to 100G
Typical power consumption: passive (low power draw, cable itself does not contain active electronics)
How to use
Ensure both devices support passive QSFP28 DACs and the 100GBase-CR4 or equivalent electrical interface. Power down or follow hot-plug procedures recommended by your hardware vendor, align the QSFP28 connectors and insert the cable into the QSFP28 ports until they latch. Confirm link status in the device management interface and verify operational parameters such as link speed and error counters. For replacement or troubleshooting, inspect connector contacts and cable routing for bends or strain and reseat the cable as necessary.
Usage recommendations
Use this 0.5 m passive QSFP28 DAC for in-rack or adjacent-rack connections where short, reliable 100G links are required. Avoid tight bending and excessive strain on the cable, and ensure connected equipment expressly supports passive QSFP28 DACs and the 100GBase-CR4 or corresponding protocol to guarantee compatibility and optimal performance.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.15 kg |
| Package weight | 160 g |
| Cable length | 0.5 m |
| Data transfer rate | 100 Gbit/s |
| Product colour | Black |
| Connector 1 | QSFP28 |
| Connector 2 | QSFP28 |
| InfiniBand protocol | Yes |

## FAQ

### How much does the BlueOptics QSFP28-DAC-0.5M-AT-BL Cable cost, and is it available for purchase?

The price is 105.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 228 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/4466735/64293553_large.webp