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

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-mt-bl--4466084
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-MT-BL
**EAN:** 4063232123189
**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-mt-bl--4466084

## 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 DAC cable by CBO, model QSFP28 to 4×SFP28, 3 meters length (BlueLAN). Designed for direct-attach connections between a QSFP28 port and four SFP28 ports in switches, routers or servers supporting breakout assemblies. Provides low-latency, energy-efficient short-reach connectivity for 100GbE to 4×25GbE deployments, simplifying rack cabling and reducing need for optical transceivers.

## Long description

BlueOptics DAC cable QSFP28 to 4×SFP28 passive, 3 m (BlueLAN) is a direct-attach copper breakout cable designed to connect one QSFP28 port to four independent SFP28 ports. Intended for short-reach interconnects inside racks and between adjacent network devices, this passive assembly supports splitting a single 100GbE interface into four 25GbE links without active transceivers or optical modules. The cable combines compact form factor and energy-efficient passive wiring to deliver low-latency connectivity for data center switches, routers and servers that support breakout mode.
Advantages
The passive DAC design eliminates the need for separate optical transceivers, reducing component count, power consumption and heat generation. A 3 m length provides flexibility for common rack topologies while minimizing excess cable slack. The QSFP28-to-4×SFP28 breakout arrangement simplifies cabling when converting a 100GbE port to multiple 25GbE links, enabling straightforward aggregation or distribution of bandwidth. The cable’s copper construction and passive characteristics offer predictable latency and reliable electrical performance for short-distance links.
Suitable for
Data center top-of-rack and end-of-row connectivity
Splitting a 100GbE interface to four 25GbE host ports
Connecting servers, switches and routers that support QSFP28 breakout
Short-reach interconnects inside racks or between adjacent cabinets
Key specifications
Interface: one QSFP28 plug to four SFP28 plugs
Length: 3 meters
Type: passive direct-attach copper breakout cable
Supported link rates: 100GbE to 4×25GbE (breakout mode)
Latency: low, deterministic electrical path suitable for short-reach connections
Construction: multi-conductor copper with molded connectors and strain relief
How to use
Install the cable by inserting the QSFP28 connector into the 100GbE port on the switch or router and connect each SFP28 plug to the corresponding 25GbE ports on target devices. Ensure both ends are fully seated and the devices are powered down or support hot-plugging according to vendor guidance. Configure the network equipment to enable QSFP28 breakout or port splitting so that the single QSFP28 interface presents four independent 25GbE links. Verify link status and speed in the device management interface after installation.
Usage recommendations
Use this passive DAC in short-distance, rack-level connections and in environments where the host devices explicitly support QSFP28-to-SFP28 breakout. Avoid routing the cable through long conduits or across large open pathways, and keep cable runs within recommended length limits to maintain signal integrity. Follow vendor guidelines for supported breakout modes and firmware compatibility when deploying these cables in production networks.

## 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/4466084/59852559_large.webp