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

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-cn-bl--4466739
**Data updated:** 2026-02-24 11:00 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-0.5M-CN-BL
**EAN:** 4063232100531
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 105.49 €
**Prices and availability valid until:** 2026-08-05 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-cn-bl--4466739

## 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

Passive copper Direct Attach Cable (DAC) by CBO, model QSFP28-DAC-0.5M, 0.5 m length for QSFP28 ports. Designed for short-reach high-speed interconnects, this twin-ax cable provides a simple, low-latency connection between switches, routers or NICs supporting QSFP28 modules. Suitable where a fixed, cost-effective copper link is required and offers plug-and-play installation without optical transceivers.

## Long description

CBO Direct Attach Cable QSFP28-DAC-0.5M is a 0.5 metre passive copper twin-ax cable engineered for direct QSFP28-to-QSFP28 connections. It provides a fixed short-reach link for 100G-capable ports, enabling low-latency, high-bandwidth interconnects between switches, routers and network interface cards without requiring optical transceivers. The cable is intended for data centre and enterprise rack-level connections where a reliable, plug-and-play copper solution is preferred.
Advantages
The passive copper design eliminates the need for separate transceiver modules, reducing both component cost and power consumption compared with optical options. With its QSFP28 form-factor compatibility, the cable supports 100G signaling and offers predictable electrical performance for short-distance links. The 0.5 m length minimises excess cable slack in dense rack environments and simplifies cabling management. Installation is straightforward: connectors are pre-terminated and ready for immediate use in compatible QSFP28 ports.
Suitable for
Short-reach 100G links between top-of-rack or leaf switches
Direct connections between QSFP28-capable network interface cards and switches
High-density rack cabling in data centres and server rooms
Use cases where fixed, low-latency copper interconnects are acceptable
Key specifications
Connector type: QSFP28 to QSFP28 passive twin-ax
Length: 0.5 m
Data rate support: 100 Gbps (QSFP28-compatible)
Cable type: Passive copper twin-ax
Latency: low, suitable for short-reach interconnects
Installation: plug-and-play, pre-terminated connectors
How to use
Power off or follow hot-swap guidelines of your network equipment if required by the manufacturer. Insert each QSFP28 connector firmly into the corresponding QSFP28 port until the retention latch engages. Verify link status through the host device’s management interface or LED indicators. To disconnect, release the retention latch and pull the connector straight out to avoid damaging the port. No additional configuration is required on the cable itself; any link negotiation or speed settings are handled by connected devices.
Usage recommendations
Use the cable within the specified environmental limits of your network equipment and avoid tight bends or kinks; maintain proper bend radius as specified by the equipment vendor. For optimal performance, use passive DACs for short links within the same rack or adjacent racks and consider active or optical options for longer distances or when extended reach and flexibility are needed.

## FAQ

### How much does the CBO QSFP28-DAC-0.5M 0.5 m Passive Copper DAC 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/4466739/59858083_large.webp