# Direct Attach Copper (DAC) Cable CBO QSFP28-DAC-0.5M 0.5 m Passive QSFP28 to QSFP28

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-ss-bl--4466764
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-0.5M-SS-BL
**EAN:** 4063232100807
**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-ss-bl--4466764

## 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

Passive Direct Attach Copper (DAC) cable CBO QSFP28-DAC-0.5M is a 0.5 m twinax cable with QSFP28 connectors at both ends designed for short-reach 100GbE connections. It provides a low-latency, cost-effective link between QSFP28 ports in switches, servers or NICs without the need for transceivers. Suitable for data center top-of-rack and adjacent-rack interconnects.

## Long description

Passive Direct Attach Copper (DAC) cable CBO QSFP28-DAC-0.5M is a 0.5 m twinax cable with QSFP28 connectors at both ends, intended for short-reach 100GbE connections. The BlueOptics cable offers a direct electrical connection between QSFP28 ports without separate optical transceivers, enabling a compact, low-latency link for top-of-rack and adjacent-rack interconnects in data centres, server racks and high-density networking environments.
Advantages
This passive QSFP28 to QSFP28 cable provides a cost-effective alternative to active modules for short-distance 100 Gigabit Ethernet links. Its fixed 0.5 m length minimises signal loss and crosstalk typical for longer copper runs, and the twinax construction supports stable high-speed transmission with low latency. The design eliminates the need for separate transceivers, reducing power consumption and simplifying inventory management for deployments with multiple short links.
Suitable for
 Short-reach 100GbE connections between switches and servers
 Top-of-rack to adjacent-rack interconnects in data centres
 Direct attach links between network interface cards (NICs) and QSFP28 ports
 High-density rack environments where low latency and compact cabling are required
Key specifications
 Connector type: QSFP28 to QSFP28
 Cable type: Passive twinax copper
 Length: 0.5 m
 Data rate: Designed for 100 Gigabit Ethernet
 Latency: Low-latency direct attach electrical link
 Power: Passive design; no active electronics in the cable
How to use
Insert each QSFP28 connector into the corresponding QSFP28 port on networking equipment such as switches, routers or server NICs, ensuring the latch engages correctly. Use the 0.5 m passive DAC for direct short links where both ends support QSFP28 electrical interfaces. Confirm port configuration and link speed in the device management interface; no additional transceiver configuration is required. For removal, press the connector latch or pull tab as specified by the equipment vendor and withdraw the cable straight out to avoid damaging the port.
Usage recommendations
Use this passive QSFP28 cable for stable, low-latency 100GbE connections within the same rack or adjacent racks. Avoid sharp bends and excessive tensile force on the cable, and maintain the recommended bend radius to preserve signal integrity. Verify compatibility with the host equipment’s supported QSFP28 passive DAC connections before deployment.

## FAQ

### How much does the CBO QSFP28-DAC-0.5M Passive 0.5m 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 — 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/4466764/59858093_large.webp