# DAC cable CBO QSFP28-DAC-0.5M passive direct attach 0.5 m for QSFP28 ports

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-co-bl--4466740
**Data updated:** 2026-02-24 11:00 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-0.5M-CO-BL
**EAN:** 4063232100524
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 105.49 €
**Prices and availability valid until:** 2026-07-29 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-co-bl--4466740

## 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 assembly for short-reach connections between QSFP28 ports. Designed for 100G Ethernet or InfiniBand QSFP28-compatible devices, it provides low-latency, power-efficient interconnects for switches, routers and servers in racks and cabinet top-of-rack deployments.

## Long description

Passive direct attach copper (DAC) cable CBO QSFP28-DAC-0.5M is a 0.5 m twinax assembly engineered for short-reach connections between QSFP28 ports. Intended for 100G Ethernet and InfiniBand QSFP28-compatible devices, this cable supports direct server-to-switch, switch-to-switch or switch-to-router links in rack and cabinet top-of-rack deployments, offering a low-latency and power-efficient physical interconnect for data center environments.
Advantages
The passive twinax construction provides minimal signal latency and low power consumption compared with active optical alternatives for short distances. A 0.5 m length reduces excess cable slack in dense rack environments and simplifies cable management. The QSFP28 connector form factor ensures compatibility with a wide range of QSFP28 ports, while the robust, factory-terminated assembly reduces the need for field terminations and lowers deployment time.
Suitable for
 100G Ethernet connections between servers, switches and routers
 Short-reach InfiniBand links in high-performance computing
 Top-of-rack and end-of-row cabling in data centers
 Point-to-point interconnects where low latency and low power are required
Key specifications
 Connector type: QSFP28 to QSFP28
 Cable type: passive twinax copper
 Length: 0.5 m
 Supported data rate: 100 Gbit/s
 Application: short-reach copper interconnects for data center equipment
 Physical: factory-terminated assembly for plug-and-play installation
How to use
Insert each QSFP28 connector into the corresponding QSFP28 port until the latch engages, ensuring proper port orientation. Confirm link status on connected devices and verify 100G negotiation or configured interface settings. For cable routing, keep the 0.5 m assembly free of sharp bends and avoid mechanical strain on the connectors. When disconnecting, release the connector latch before pulling to prevent damage.
Usage recommendations
Use this passive DAC cable for short intra-rack or adjacent-rack links where distance does not exceed the 0.5 m length. Avoid exposure to temperatures or environments beyond typical data center operating ranges, and follow vendor interoperability lists to ensure full compatibility with network equipment. For longer distances or where electrical isolation is required, consider optical transceivers and fiber cabling.

## FAQ

### How much does the CBO QSFP28-DAC-0.5M DAC cable 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 — 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/4466740/59856714_large.webp