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

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-mv-bl--4466085
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-MV-BL
**EAN:** 4063232123110
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-08-01 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-mv-bl--4466085

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.07.2026 | free |
| Pickup points | 04.08.2026 | 1.89 EUR |
| Courier delivery to door | 04.08.2026 | 4.99 EUR |

## Summary description

Passive Direct Attach Copper (DAC) cable by CBO, QSFP28 to 4×SFP28 breakout, 3 meters long. Designed for short-range high-speed connections between QSFP28 and SFP28 ports, supporting 100GbE to 4×25GbE breakout applications. Suitable for top-of-rack switches, servers and storage, offering low-latency, low-power connectivity without external optics.

## Long description

Passive Direct Attach Copper (DAC) cable CBO QSFP28 to 4×SFP28, 3 m, is a short-reach, high-bandwidth breakout cable designed to convert a single QSFP28 100GbE port into four independent SFP28 25GbE links. Constructed for reliable rack-level connections, this passive copper assembly provides low latency and low power consumption without requiring external transceivers. The 3 m length is intended for top-of-rack and middle-of-row installations where cost-efficient, high-speed connectivity is needed between switches, servers and storage systems.
Advantages
The cable delivers four 25GbE channels from a single QSFP28 connector using passive copper wiring, minimizing complexity and eliminating the need for optical modules. Its passive design reduces power draw and heat compared with active assemblies, while maintaining signal integrity for short distances. The breakout format simplifies migration and port consolidation in data centres by enabling direct connection of SFP28 ports to a QSFP28 uplink without additional optics.
Suitable for
 Top-of-rack and spine switch to server connections
 Server to storage or NIC breakout links
 Short-reach 100GbE to 4×25GbE breakout applications
 Racks and rows in data centre aggregation layers
Key specifications
 Connector type: QSFP28 to 4×SFP28 breakout
 Cable type: Passive direct attach copper (DAC)
 Supported speeds: 100GbE native, convertible to 4×25GbE
 Length: 3 meters
 Form factor: Breakout cable for rack-level connectivity
 Typical use range: Short-reach interconnects within racks or between adjacent racks
How to use
Insert the QSFP28 plug into the 100GbE QSFP28 port on the switch or aggregation device and insert each SFP28 plug into corresponding 25GbE ports on servers, NICs or storage appliances. Ensure both ends are fully seated and secured by the connector latches. Verify link status and speed via the network equipment management interface and configure port mapping or breakout modes if required by the switch firmware. No additional optics or power sources are required for passive operation.
Usage recommendations
Use this passive QSFP28 to 4×SFP28 DAC for short-distance, high-bandwidth links within a rack or between adjacent racks. Avoid installation in environments that exceed typical data centre temperature ranges, and route the cable to prevent sharp bends or kinks. For longer reaches or environments requiring optical isolation, consider active DACs or fiber solutions.

## FAQ

### How much does the DAC cable CBO QSFP28 to 4×SFP28, 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 30.07.2026 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/4466085/59857225_large.webp