# DAC cable CBO QSFP28 to 4× SFP28, direct attach copper, 3 m

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-sw-bl--4466096
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-SW-BL
**EAN:** 4063232123172
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-08-07 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-sw-bl--4466096

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 05.08.2026 | free |
| Pickup points | 10.08.2026 | 1.89 EUR |
| Courier delivery to door | 10.08.2026 | 4.99 EUR |

## Summary description

Direct Attach Copper (DAC) cable by CBO with QSFP28 connector to four SFP28 connectors, length 3 meters. Designed for short-reach, high-speed connections between QSFP28 ports and multiple SFP28 ports in switches, servers or storage devices. Provides low-latency, energy-efficient copper connectivity for 25Gb/s lanes aggregated from a QSFP28 port, suitable for data center top-of-rack and cross-rack links.

## Long description

Direct Attach Copper (DAC) cable CBO QSFP28 to 4× SFP28, 3 m is a fixed copper breakout cable designed to connect a single QSFP28 port to four SFP28 ports. The cable supports short-reach, high-speed connections in data center environments where 25Gb/s lanes from a QSFP28 interface are split across multiple SFP28 endpoints. With a 3 meter length, this DAC solution provides a low-latency, power-efficient link for switches, servers and storage systems requiring dense, reliable aggregation.
Advantages
This DAC cable offers low electrical latency and reduced power consumption compared with active optical alternatives for short links. Being a direct attach copper assembly, it simplifies connectivity without external transceivers and lowers total cost of ownership for rack-to-rack or top-of-rack deployments. The integrated breakout design enables consolidation of multiple 25Gb/s lanes from a single QSFP28 port into independent SFP28 connections, facilitating flexible port mapping and easier hardware upgrades.
Suitable for
Top-of-rack switch to server connections requiring multiple 25Gb/s links
Cross-rack aggregation in compact data center layouts
High-density switch port consolidation where QSFP28 breakout is needed
Short-reach interconnects between storage arrays and compute nodes
Key specifications
Cable type: passive direct attach copper breakout
Connectors: QSFP28 (one end) to 4 × SFP28 (other end)
Aggregate data rate: supports four 25Gb/s lanes from a QSFP28 interface
Length: 3 meters
Use case: short-reach, within-rack or adjacent-rack connections
Latency: low electrical latency suitable for high-performance switching
Power: passive copper design with minimal additional power requirements
How to use
Insert the QSFP28 end into the source device port and the four SFP28 ends into the corresponding target ports on switches, servers or storage equipment. Ensure both ends are fully seated and that connected devices support QSFP28-to-SFP28 breakout operation and the desired 25Gb/s lane configuration. Verify link status in the devices’ management interfaces and, if required, configure port mapping or lane assignment according to network design. Handle the cable by the connector housings and avoid excessive bending of the copper assembly to maintain signal integrity.
Usage recommendations
For optimal performance, use this 3 m DAC cable for short-reach links inside racks or between adjacent racks, ensure device compatibility with QSFP28 breakout functionality, and avoid running the cable near strong electromagnetic interference sources. Regularly inspect connectors for contamination and secure cable routing to prevent mechanical strain.

## FAQ

### How much does the CBO QSFP28 to 4×SFP28 DAC cable, 3 m 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 05.08.2026 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/4466096/59853454_large.webp