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

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-va-bl--4466098
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-VA-BL
**EAN:** 4063232123271
**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-va-bl--4466098

## 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

Direct-attach copper (DAC) cable by CBO with a QSFP28 plug to four SFP28 connectors, 3 meters long. Designed for high-speed 100GbE/4×25GbE or compatible QSFP28/SFP28 interconnections in data centers, switch-to-switch links, server connections and top-of-rack setups. Provides a low-latency, cost-effective short-reach connection without transceivers and reduces power consumption and cabling complexity.

## Long description

CBO DAC cable QSFP28 to 4×SFP28, 3 m length, is a direct-attach copper assembly designed for short-reach 100GbE or 4×25GbE connections. The cable integrates a single QSFP28 plug on one end and four SFP28 connectors on the other, enabling direct interconnection between QSFP28 ports and multiple SFP28 ports without separate transceivers. It is intended for data center top-of-rack wiring, switch-to-switch links and server uplinks where low latency, low power consumption and simplified cabling are priorities.
Advantages
The direct-attach copper design delivers low latency and stable signal integrity for short distances while avoiding the cost and power draw of optical transceivers. A pre-terminated QSFP28 to 4×SFP28 configuration allows flexible break-out connections in dense rack environments, reducing the need for additional adapters and simplifying port management. The 3 m length provides sufficient reach for common rack and adjacent-rack layouts while keeping insertion loss and crosstalk low.
Suitable for
 Top-of-rack switch to server uplinks
 Switch-to-switch 100GbE or 4×25GbE connections
 High-density patching and break-out scenarios in data centers
 Short-reach, low-latency connections inside racks or between adjacent racks
Key specifications
 Connector type: QSFP28 to 4×SFP28 copper direct-attach
 Supported data rates: 100GbE or 4×25GbE
 Cable length: 3 meters
 Transmission medium: twinax copper with shielded connectors
 Topology: break-out (1×QSFP28 to 4×SFP28)
 Typical use range: short-reach data center interconnects
How to use
Insert the QSFP28 plug into the source port (for example a 100GbE switch port) and insert the SFP28 plugs into the destination ports (for example four 25GbE server or switch ports). Ensure both ends are fully seated and latches are engaged. Verify link status and speed on connected devices and configure port breakout or lane mapping if required by the switch or host. No transceivers or separate optics are required; the cable provides an integrated electrical connection.
Usage recommendations
Use the cable for short, direct connections inside racks or between adjacent racks. Avoid routing through sharp bends or subjecting the cable to excessive mechanical stress. Verify compatibility with equipment vendor guidance for QSFP28 break-out and SFP28 port support, and check switch firmware or configuration for required breakout settings.

## 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 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

https://aio.lv/img/cache/product/4466098/59873770_large.webp