# Copper DAC cable CBO QSFP28 to 4×SFP28, passive, 3 m

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-ib-bl--4466079
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-IB-BL
**EAN:** 4063232123004
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-07-31 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-ib-bl--4466079

## 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

Passive copper Direct Attach Cable (DAC) from CBO, connecting a QSFP28 port to four SFP28 ports with a fixed 3 m length. Designed for short-reach, high-density interconnects in data centers and network racks, it provides low-latency, cost-effective connectivity without optical modules. Suitable for server, switch and storage link aggregation and breakout applications.

## Long description

The Copper DAC cable CBO QSFP28 to 4×SFP28, passive, 3 m is a fixed-length direct attach copper assembly designed to provide a cost-efficient, low-latency connection between a QSFP28 port and four SFP28 ports. Intended for short-reach interconnects in data centres, network racks and server rooms, this passive 3 m cable eliminates the need for separate optical transceivers while supporting high-density breakout and link aggregation setups. The construction and connector arrangement make it suitable for rack-mounted switches, servers and storage systems that require reliable 100 Gbps-to-4×25 Gbps breakout links.
Advantages
This passive copper DAC offers predictable electrical performance with minimal latency and low power consumption compared with active or optical solutions. The integrated QSFP28 and four SFP28 connectors simplify breakout installations and reduce component count in high-density environments. The fixed 3 m length supports tidy cable management in typical rack depths and helps avoid excess slack. As a passive assembly, it provides a cost-effective alternative for short-distance 100G-to-4×25G connections without optical modules or separate transceivers.
Suitable for
 Short-reach breakout connections between a QSFP28 port and multiple SFP28 ports in data centres
 High-density switch-to-server or switch-to-storage interconnects within the same rack or adjacent racks
 Link aggregation and breakout configurations that require 100 Gbps to be split into 4×25 Gbps channels
 Environments where low latency and low power consumption are priorities
Key specifications
 Cable type: passive direct attach copper (DAC)
 Connector configuration: QSFP28 (one end) to 4 × SFP28 (other end)
 Length: 3 m (fixed)
 Data rate support: 100 Gbps aggregated to 4 × 25 Gbps
 Typical application: short-reach rack and cabinet interconnects
 Physical form factor: fixed-cable breakout assembly for high-density deployment
How to use
Insert the QSFP28 connector into the 100G QSFP28 port of the switch, router or host interface, and insert each SFP28 connector into the corresponding 25G SFP28 ports on the receiving device. Ensure devices are powered down or follow hot-plug procedures specified by the equipment vendor if supported. Route the cable to avoid sharp bends and maintain the recommended bend radius for copper assemblies. Verify link status and speed on both ends after installation and configure switch or host ports for breakout or aggregation as required by your network design.
Usage recommendations
For optimal performance, use the 3 m passive DAC for intra-rack or adjacent-rack connections only. Avoid extended cable runs and environments with high electromagnetic interference. Confirm compatibility with your hardware vendor’s supported copper DAC list and follow proper handling to prevent connector damage.

## 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 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/4466079/59859300_large.webp