# DAC cable CBO Q28-4S28-DAC-3M-QL-BL 3 m QSFP28 100 Gbit/s

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-ql-bl--4466091
**Data updated:** 2026-03-07 14:46 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-QL-BL
**EAN:** 4063232123141
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-07-30 23:59
**Price without VAT (21%):** 159.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-ql-bl--4466091

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.07.2026 | free |
| Pickup points | 03.08.2026 | 1.89 EUR |
| Courier delivery to door | 03.08.2026 | 4.99 EUR |

## Summary description

Direct attach copper (DAC) cable CBO Q28-4S28-DAC-3M-QL-BL is a 3 m QSFP28 interconnect supporting 100 Gbit/s. Designed for short-reach connections between switches, servers and network appliances, it provides a low-latency, energy-efficient link without transceivers. Suitable for data centers and high-speed rack-to-rack links where a fixed 3 m passive copper solution is required.

## Long description

Direct attach copper (DAC) cable CBO Q28-4S28-DAC-3M-QL-BL is a 3 m passive QSFP28 interconnect that supports 100 Gbit/s data rates. The BlueOptics cable is intended for short-reach connections between switches, servers and network appliances where a low-latency, cost-effective and energy-efficient electrical link is required without separate optical transceivers. Its fixed 3 m length and QSFP28 connector format make it suitable for rack-to-rack and within-rack high-speed links in data center environments.
Advantages
The DAC cable offers a direct electrical connection that reduces power consumption compared with optical transceiver-based links and eliminates the need for separate SFP/QSFP modules. Passive construction minimizes latency and complexity while providing a secure physical link. The 100 Gbit/s QSFP28 interface ensures compatibility with equipment supporting QSFP28 ports and short-reach copper connections, and the fixed 3 m length simplifies cable management for defined rack layouts.
Suitable for
 Short-reach switch-to-switch connections in data centers
 Server-to-switch high-speed uplinks within racks
 Rack-to-rack interconnects over a 3 m span
 Network appliances requiring QSFP28 100 Gbit/s electrical links
Key specifications
 Connector type: QSFP28
 Data rate: 100 Gbit/s
 Length: 3 m (fixed)
 Cable type: Direct attach copper (passive DAC)
 Application: Short-reach, rack-to-rack and within-rack interconnects
How to use
Insert each QSFP28 plug into the corresponding QSFP28 port on the network devices until the latch engages; ensure ports are powered down or follow hot-plug procedures recommended by the device manufacturer. Verify link status through device management interfaces after connection. Use the fixed 3 m length to route the cable cleanly along rack rails or cable management pathways to avoid sharp bends and mechanical strain on the connectors.
Usage recommendations
Use the DAC cable in short-reach scenarios up to 3 m and within equipment compatibility lists that support passive QSFP28 copper assemblies. Avoid excessive bending near the connector ends, keep the cable away from sources of strong electromagnetic interference, and follow chassis vendor guidelines for hot-plugging and port compatibility.

## FAQ

### How much does the DAC cable CBO Q28-4S28-DAC-3M-QL-BL QSFP28 100G cost, and is it available for purchase?

The price is 192.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 29 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 29.07.2026 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/4466091/59860255_large.webp