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

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-ia-bl--4466078
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-IA-BL
**EAN:** 4063232123011
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-08-09 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-ia-bl--4466078

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.08.2026 | free |
| Pickup points | 13.08.2026 | 1.89 EUR |
| Courier delivery to door | 13.08.2026 | 4.99 EUR |

## Summary description

Passive direct attach copper (DAC) cable by CBO featuring a QSFP28 plug to four SFP28 connectors, length 3 meters. Designed for short-reach 100GbE to 4×25GbE fanout connections between switches, routers or servers. Provides low-latency, cost‑effective connectivity with no external power, suitable for data centers and network aggregation where reliable high-speed links are required.

## Long description

Passive direct attach copper (DAC) cable CBO QSFP28 to 4×SFP28, passive, 3 m by BlueOptics provides a fixed, high-bandwidth electrical connection for short-reach 100GbE to 4×25GbE fanout applications. The assembly integrates a QSFP28 plug on one end and four SFP28 receptacles on the other, supporting multi-lane breakout topologies between switches, routers and servers. With a 3 meter length and passive construction it offers low latency and straightforward deployment without the need for external power or transceivers.
Advantages
This DAC cable delivers reliable, low-latency connectivity with minimal signal processing, making it a cost-effective choice for short-distance aggregation links. The integrated breakout format simplifies cabling between a single 100GbE port and four 25GbE ports, reducing the number of required modules and easing rack-side management. Passive copper construction ensures energy-efficient operation and stable performance in typical data center environments.
Suitable for
Short-reach 100GbE to 4×25GbE fanout connections in data centers
Server to top-of-rack or leaf switch interconnects
High-density aggregation and spine-leaf architectures
Low-latency links in storage or compute clusters
Key specifications
Connector types: QSFP28 plug to four SFP28 connectors
Length: 3 meters
Cable type: Passive direct attach copper (DAC)
Supported data rate: 100GbE breakout to 4×25GbE
Typical use: Short-reach, rack/mid-plane connections
Latency: Minimal, electrical direct-attach link
How to use
Insert the QSFP28 plug into the 100GbE QSFP28 port on the switch or router and plug each SFP28 connector into the corresponding 25GbE ports on the destination device. Ensure ports are powered down or administratively disabled if required by your hardware vendor’s installation procedure, then enable the ports after physical connection. Verify link status and speed in device management interfaces and adjust port or breakout configuration as needed to match switch firmware and network topology.
Usage recommendations
Use this passive DAC cable for short-distance connections within racks or between adjacent racks; avoid routing through cable trays with tight bends and keep ambient temperature within the host equipment specifications. Confirm compatibility with switch firmware and port breakout settings before deployment, and inspect connectors for contamination 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 10.08.2026 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/4466078/59854121_large.webp