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

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-ss-bl--4466095
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-SS-BL
**EAN:** 4063232123073
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-08-05 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-ss-bl--4466095

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.08.2026 | free |
| Pickup points | 06.08.2026 | 1.89 EUR |
| Courier delivery to door | 06.08.2026 | 4.99 EUR |

## Summary description

Passive Direct Attach Copper (DAC) cable from CBO converting one QSFP28 port to four SFP28 ports. 3 m length suitable for short-reach high-speed connections in data centers and server racks. Supports 100Gb/s QSFP28 breakout to 4×25Gb/s SFP28 links, low latency and reduced power compared with active optics, plug-and-play installation for switches, routers and NICs.

## Long description

Passive Direct Attach Copper (DAC) cable CBO QSFP28 to 4× SFP28 passive, 3 m length provides a compact and reliable physical connection for breaking out a single 100Gb/s QSFP28 port into four independent 25Gb/s SFP28 links. Designed for short-reach high-speed interconnects in data centers and server racks, this 3 meter DAC cable offers a low-latency, low-power alternative to active optics while supporting plug-and-play installation with compatible switches, routers and network interface cards.
Advantages
The passive DAC construction ensures minimal signal processing and lower power consumption compared with active transceivers. Its breakout design enables flexible port utilization by converting one QSFP28 lane into four SFP28 ports without additional media converters. The 3 m length is suitable for rack-to-rack or switch-to-server connections within the same equipment bay, and the cable’s passive nature reduces heat generation and operational complexity. Compatibility with standard QSFP28 and SFP28 form factors simplifies installation and replacement.
Suitable for (tasks / use cases)
100Gb/s to 4×25Gb/s breakout connections in data centers
High-density switch-to-server links within racks and cabinets
Short-reach interconnects in top-of-rack and end-of-row deployments
Low-latency connections for compute clusters and storage arrays
Key specifications
Connector type: one QSFP28 plug to four SFP28 plugs
Function: passive direct attach copper breakout cable
Data rate: supports 100Gb/s aggregate with 4×25Gb/s lanes
Length: 3 meters
Latency: negligible added latency typical for copper DAC links
Power: passive design with reduced power consumption compared to active optics
Use environment: designed for short-reach, within-rack or adjacent-rack connections
How to use
Insert the QSFP28 end into the 100Gb/s QSFP28 port on the switch or router and connect the four SFP28 ends to SFP28 ports on target devices such as servers or line cards. Ensure both ends are securely seated and that connected equipment supports DAC passive cable connections and the intended breakout configuration. No additional configurations are required at the physical layer; the connected devices will negotiate link speed on the SFP28 ports according to their capabilities.
Usage recommendations
Use the cable for short-distance, high-speed links within the same rack or between adjacent racks. Avoid tight bends and maintain recommended bend radius to prevent mechanical stress. Verify compatibility with your hardware vendor’s supported transceiver and DAC lists, and check switch firmware or NIC settings if link negotiation issues occur.

## 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 03.08.2026 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

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