# Direct Attach Copper (DAC) Cable CBO DEM-CB100Q28-0.5 0.5 m QSFP28

**URL:** https://aio.lv/en/product--blueoptics-dem-cb100q28-05-bl--4464861
**Data updated:** 2026-02-25 16:30 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** DEM-CB100Q28-0.5-BL
**EAN:** 4063232145075
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 105.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 87.18 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-dem-cb100q28-05-bl--4464861

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.89 EUR |
| Courier delivery to door | 29.07.2026 | 4.99 EUR |

## Summary description

CBO DEM-CB100Q28-0.5 is a 0.5 m Direct Attach Copper (DAC) cable with QSFP28 connectors designed for short-reach, high-speed interconnections between network devices. It provides a fixed, low-latency link for QSFP28 ports, suitable for switches, routers and servers in data centers or rack-to-rack connections, offering plug-and-play simplicity and reduced power compared with active optics.

## Long description

CBO DEM-CB100Q28-0.5 is a 0.5 m Direct Attach Copper (DAC) cable fitted with QSFP28 connectors for short-reach, high-bandwidth interconnections. The cable provides a fixed electrical connection between QSFP28 ports on switches, routers and servers, enabling 100Gbps-class links with low latency and low power consumption compared with active optical solutions. Its short, pre-terminated design supports plug-and-play installation in rack-to-rack and intra-rack layouts in data centers and telecom environments.
Advantages
This DAC cable delivers a reliable, low-latency connection optimized for high-density networking equipment. The passive copper assembly eliminates the need for separate transceivers and reduces power draw and heat generation. With QSFP28 terminations it supports native 100Gbps signaling and interoperates with devices that accept QSFP28 electrical interfaces. The fixed-length, rugged construction simplifies cable management and reduces potential points of failure compared with field-terminated options.
Suitable for
 Short-reach connections between QSFP28 ports on switches and routers
 Server-to-switch links in rack and top-of-rack deployments
 High-density data center aggregation and spine-leaf fabrics
 Testing and staging environments requiring consistent electrical links
Key specifications
 Connector type: QSFP28 to QSFP28
 Length: 0.5 meter
 Data rate support: up to 100 Gbps (native QSFP28 electrical signaling)
 Cable medium: copper (direct attach passive)
 Form factor: pre-terminated fixed-length twinax assembly
 Typical use: short-reach, rack-to-rack and intra-rack interconnects
How to use
Install the DAC cable by inserting each QSFP28 connector into the corresponding port until the latch clicks. Ensure both devices are powered down or follow hot-plug procedures recommended by the equipment vendor. Verify link status on connected devices and confirm negotiated speed and lane configuration. For best signal integrity, avoid sharp bends and maintain recommended bend radius; route the cable along existing cable management channels to prevent strain on connectors.
Usage recommendations
Use this 0.5 m QSFP28 DAC cable for short-distance, high-throughput links within racks or between adjacent racks. Avoid extended outdoor exposure, excessive mechanical stress, and environments outside the specified temperature and humidity range of connected equipment. When replacing active transceivers with a DAC, confirm compatibility with the switch or server vendor and any firmware requirements.

## FAQ

### How much does the DAC Cable CBO DEM-CB100Q28-0.5 0.5 m QSFP28 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 24.07.2026 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/4464861/59855131_large.webp