# DAC cable CBO QSFP28 to 4×SFP28 3 m (QSFP28-4SFP28-DAC-3M)

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-cp-bl--4466073
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-CP-BL
**EAN:** 4063232122977
**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-cp-bl--4466073

## 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

Passive direct-attach copper (DAC) cable by CBO, QSFP28 to 4×SFP28, 3 meters long. Designed to connect QSFP28 ports to four SFP28 ports for short-reach high-speed links in data centers, switches and servers. Provides fixed-rate electrical interconnect for 100GbE split to 4×25GbE or compatible configurations, simplifying rack-level cabling and reducing latency.

## Long description

Passive direct-attach copper (DAC) cable CBO QSFP28 to 4×SFP28, 3 m is a fixed-rate electrical interconnect designed for short-reach, high-bandwidth links. The cable converts a single QSFP28 port into four SFP28 ports, enabling 100GbE split to 4×25GbE or other compatible configurations. It is intended for use in data centers, top-of-rack and end-of-row switch deployments, and server-to-switch connections where low latency and reliable 25 Gbit/s lanes are required.
Advantages
This DAC cable provides a cost-effective and power-efficient way to implement high-density 100GbE to 4×25GbE connectivity without the need for active transceivers or fibre optics. The passive copper construction reduces heat and power consumption compared with active optical solutions and simplifies rack-level cabling by delivering a single physical link that splits into four lanes. Its pre-terminated design minimizes installation time and ensures consistent electrical performance for short-distance interconnects.
Suitable for
Splitting a QSFP28 100GbE port into four SFP28 25GbE ports in switches and routers
Server to top-of-rack switch connections in data centers
Short-reach high-speed links inside racks or between adjacent racks
Environments requiring low latency and fixed-rate 25 Gbit/s lanes
Key specifications
Cable type: Passive direct-attach copper (DAC)
Connector configuration: QSFP28 to 4×SFP28
Supported lane rate: 25 Gbit/s per SFP28 lane (4 lanes aggregated to 100 Gbit/s)
Length: 3 meters
Use case: Short-reach, rack-level interconnects
Typical environments: Data centers, server rooms, network racks
How to use
Insert the QSFP28 end into the QSFP28 port on the source device and insert each SFP28 connector into the corresponding SFP28 ports on the target device. Ensure both devices support QSFP28 breakout to 4×SFP28 and are powered down or have ports in a safe state if required by the vendor during installation. After seating the connectors, verify link status and lane speeds via device management interfaces or LEDs; the link should operate as four independent 25 Gbit/s lanes or as a combined 100 Gbit/s channel according to equipment capabilities.
Usage recommendations
Best results are achieved in short-reach interconnects up to the specified 3 m length in controlled data center environments. Confirm compatibility with switch and server vendors for QSFP28-to-4×SFP28 passive DAC use, and avoid exceeding rated bend radius or mechanical stress on connectors and cable assembly to maintain signal integrity.

## 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/4466073/59859298_large.webp