# DAC cable CBO QSFP28-DAC-0.5M 0.5m passive copper QSFP28 to QSFP28

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-pa-bl--4466756
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-0.5M-PA-BL
**EAN:** 4063232100739
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 104.49 €
**Prices and availability valid until:** 2026-08-11 23:59
**Price without VAT (21%):** 86.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-pa-bl--4466756

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.08.2026 | free |
| Pickup points | 13.08.2026 | 1.89 EUR |
| Courier delivery to door | 13.08.2026 | 4.99 EUR |

## Summary description

CBO QSFP28-DAC-0.5M is a 0.5 m passive copper direct-attach cable (DAC) with QSFP28 connectors at both ends. Designed for short-reach high-speed interconnects, it links QSFP28 ports in switches, routers or servers without transceivers. Benefits include low latency, power-free operation at the link level, and a compact cable for data center top-of-rack and server-to-switch connections.

## Long description

CBO QSFP28-DAC-0.5M is a 0.5 m passive copper direct-attach cable with QSFP28 connectors at both ends. It provides a short-reach, high-bandwidth physical link between QSFP28 ports in switches, routers and servers without requiring separate optical transceivers. The cable is intended for dense data centre top-of-rack, server-to-switch and switch-to-switch connections where minimal latency and low power use are important. Its fixed-length, compact design simplifies cabling in rack environments while supporting 100 Gigabit Ethernet and other QSFP28-compatible interfaces.
Advantages
The passive copper construction delivers low latency and avoids the need for powered transceivers, reducing overall link power consumption. A 0.5 m length minimizes signal loss and crosstalk on very short interconnects while keeping cable slack to a minimum in congested racks. QSFP28 connectors at both ends ensure direct compatibility with devices that support QSFP28 ports and standard DAC operation, enabling plug-and-play installation without additional modules. The compact profile helps maintain airflow and cable management in dense installations.
Suitable for
Top-of-rack connections between switches and server leafs in data centres
Short-range interconnects in server racks and network closets
High-speed links where low latency and low power are required
Direct connections between QSFP28 ports for 100 Gigabit Ethernet or compatible high-speed fabrics
Key specifications
Connector type: QSFP28 to QSFP28
Cable type: Passive copper direct-attach cable (DAC)
Length: 0.5 m
Supported data rates: QSFP28-class speeds (100 Gb/s and compatible lane configurations)
Typical use: Short-reach rack-level and chassis-level interconnects
Power: Passive (no active electronics in the cable)
How to use
Install the QSFP28-DAC-0.5M by inserting each QSFP28 connector into the corresponding QSFP28 port on the devices to be connected. Ensure both devices are powered down or follow the vendor’s hot-plug guidance when connecting live equipment. Verify link status and configuration on the connected devices; the cable functions as a direct electrical link and does not require separate transceivers or additional configuration beyond standard port settings. Route the cable to avoid sharp bends and reduce mechanical strain at the connectors.
Usage recommendations
Use this 0.5 m passive DAC for intra-rack and adjacent-rack connections where port-to-port distances are short. Avoid using passive DACs for runs beyond the tested short-reach distance; for longer links, consider active DACs or optical transceivers and fibre cables. Follow equipment vendor compatibility lists and ensure QSFP28 port settings match the required speed and lane configuration.

## FAQ

### How much does the CBO QSFP28-DAC-0.5M 0.5m passive QSFP28 cable cost, and is it available for purchase?

The price is 104.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 224 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 10.08.2026 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/4466756/59856717_large.webp