# Direct Attach DAC Cable CBO QSFP28-DAC-0.5M 0.5 m QSFP28 passive copper

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-gm-bl--4466745
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-0.5M-GM-BL
**EAN:** 4063232100579
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 105.49 €
**Prices and availability valid until:** 2026-07-31 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-gm-bl--4466745

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.07.2026 | free |
| Pickup points | 03.08.2026 | 1.89 EUR |
| Courier delivery to door | 03.08.2026 | 4.99 EUR |

## Summary description

CBO QSFP28-DAC-0.5M is a 0.5 m Direct Attach copper cable with QSFP28 connectors for short-range high-speed interconnects. Designed for 100GbE links between switches, servers or NICs, this passive DAC provides low-latency, power-efficient connectivity without optics. Ideal for data center top-of-rack, aggregation and server-to-switch connections.

## Long description

CBO QSFP28-DAC-0.5M 0.5 m QSFP28 passive copper is a 0.5 metre Direct Attach copper cable with QSFP28 connectors engineered for short-range, high-speed interconnects. It provides a direct electrical connection for 100 Gigabit Ethernet links between switches, servers and network interface cards, delivering low latency and energy-efficient operation without the need for optical transceivers. The compact passive construction makes it suitable for dense data centre top-of-rack and aggregation deployments where reliable, cost-effective short-reach connectivity is required.
Advantages
The passive QSFP28 DAC offers predictable performance with low insertion loss and minimal signal processing, resulting in reduced latency compared with active or optical solutions. Its 0.5 m length minimises cable clutter in rack environments and helps maintain airflow and cooling efficiency. Because it does not require additional transceivers or power for signal conversion, the cable lowers total system power consumption and simplifies inventory by combining connector and cable in a single unit.
Suitable for
 100 Gigabit Ethernet connections between top-of-rack switches and aggregation switches
 Server-to-switch and NIC-to-switch links in data centres
 Short-reach interconnects inside racks or between adjacent racks
 Environments prioritising low latency and reduced power draw
Key specifications
 Connector type: QSFP28 to QSFP28
 Length: 0.5 m (0.5 metre)
 Cable type: Passive copper direct attach
 Supported link speed: 100 Gb/s
 Typical use: Short-range, rack-level interconnects
 Operating environment: Data centre and networking racks
How to use
Insert each QSFP28 connector into the corresponding QSFP28 port on the two devices to be connected, ensuring the latch engages securely. Verify link status on connected devices and monitor for expected 100 Gb/s negotiation. No additional configuration or power source is required for the passive cable itself; treat it as a fixed copper link within the host devices' port settings and management interfaces. Handle the cable by the connector housings and avoid sharp bends at the termination points to maintain signal integrity.
Usage recommendations
For reliable operation, use this 0.5 m passive QSFP28 DAC for short-distance rack-level connections only. Avoid stretching beyond the specified length and keep bend radii gentle near connectors. Ensure compatibility with device QSFP28 port specifications and firmware recommendations before deployment, and maintain proper cable management to support airflow in dense rack installations.

## FAQ

### How much does the DAC Cable CBO QSFP28-DAC-0.5M QSFP28 0.5 m 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 — 227 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 29.07.2026 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/4466745/59858087_large.webp