# Direct Attach DAC cable CBO QSFP28-DAC-0.5M 0.5 m for QSFP28 ports, passive copper

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-na-bl--4466754
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-0.5M-NA-BL
**EAN:** 4063232100715
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 105.49 €
**Prices and availability valid until:** 2026-08-06 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-na-bl--4466754

## 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

CBO QSFP28-DAC-0.5M is a 0.5 m Direct Attach Copper (DAC) cable with QSFP28 connectors for short-distance 100GbE or InfiniBand links. Passive construction provides a low-latency, cost-effective connection between QSFP28 ports in switches, routers or servers. Ideal for rack-to-rack or intra-rack connections where power efficiency and latency minimization are required.

## Long description

CBO QSFP28-DAC-0.5M is a 0.5 m Direct Attach Copper (DAC) cable with QSFP28 connectors designed for short-distance 100GbE or InfiniBand links. Its passive copper construction delivers a straightforward, low-latency physical connection between devices equipped with QSFP28 ports, suitable for rack-to-rack or intra-rack interconnects in data centres, server rooms and network closets. The cable provides a compact, power-efficient alternative to optical transceivers for short reach applications.
Advantages
The passive design reduces power consumption compared with active or optical alternatives and eliminates the need for additional transceiver modules. The short 0.5 m length minimizes signal attenuation and latency, supporting high-speed data transfer with predictable performance. QSFP28 connectors ensure broad compatibility with devices that accept QSFP28 form-factor direct-attach cables, while the copper construction offers robust mechanical durability for repeated insertion and removal.
Suitable for
 Short-distance 100GbE connections between switches
 Intra-rack links connecting servers and top-of-rack switches
 InfiniBand connections for high-performance computing nodes
 Environments where low latency and power efficiency are priorities
Key specifications
 Connector type: QSFP28 to QSFP28
 Cable type: Passive direct attach copper (DAC)
 Length: 0.5 m
 Data rate: Designed for 100GbE / InfiniBand short-reach links
 Construction: Shielded copper suitable for rack environments
How to use
Insert each QSFP28 connector into the corresponding QSFP28 port on the network devices until the connector latches. Ensure ports are powered down or follow hot-swap procedures recommended by the equipment vendor if required. After connection, verify link status via device management interfaces and confirm the link negotiates at the expected 100GbE or InfiniBand speed. For best performance, avoid sharp bends and excessive strain on the cable during installation.
Usage recommendations
Use this 0.5 m passive DAC for short, direct interconnects within racks or between adjacent racks. Avoid extending beyond intended short-reach applications; for longer distances or where optical isolation is required, consider optical transceivers and fiber cabling. Store the cable coiled without tight bends and handle connectors by their housings to prevent damage.

## FAQ

### How much does the CBO QSFP28-DAC-0.5M QSFP28 DAC 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 — 226 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

https://aio.lv/img/cache/product/4466754/59853796_large.webp