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

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-sp-bl--4466094
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-SP-BL
**EAN:** 4063232123196
**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-sp-bl--4466094

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 31.07.2026 | free |
| Pickup points | 05.08.2026 | 1.89 EUR |
| Courier delivery to door | 05.08.2026 | 4.99 EUR |

## Summary description

Passive CBO direct-attach copper (DAC) cable with a QSFP28 connector to four SFP28 connectors, length 3 meters. Designed for short-range high-speed connections between QSFP28 and multiple SFP28 ports in data centers and network equipment. Provides low-latency, energy-efficient 25/100Gbps-compatible links for switch-to-switch or switch-to-server use.

## Long description

BlueOptics DAC cable CBO QSFP28 to 4×SFP28 passive, 3 m is a direct-attach copper assembly that converts a single QSFP28 port into four SFP28 ports over a single 3-meter twinax link. It supports 25Gbps per lane and 100Gbps aggregate speeds for short-range interconnections in racks and between adjacent racks. The passive design eliminates active electronics in the cable, delivering low latency and reduced power consumption while providing a cost-effective solution for high-density switch-to-switch or switch-to-server links in data centre environments.
Advantages
The passive QSFP28 to 4×SFP28 DAC offers reliable electrical performance with minimal signal processing, ensuring stable 25/100Gbps links without the need for transceivers. Its 3 m length is suited to short-reach top-of-rack and middle-of-row connections, simplifying cable management and reducing heat and power draw compared with active or fiber-based alternatives. The integrated multiport breakout reduces port adapter requirements and supports high-density deployments where space and power efficiency are priorities.
Suitable for
Short-range switch-to-switch connections within a rack or between adjacent racks
Connecting QSFP28 ports to multiple SFP28 server or NIC ports
High-density top-of-rack aggregation and spine-leaf fabric links
Environments prioritising low latency and reduced power consumption
Key specifications
Cable type: passive direct-attach copper (DAC) twinax
Connector configuration: QSFP28 (one end) to 4×SFP28 (other end)
Supported data rates: up to 25Gbps per lane, 100Gbps aggregate
Length: 3 metres
Typical use: short-reach data centre interconnects, top-of-rack and adjacent rack connections
Physical: compact, shielded twinax construction suitable for high-density deployments
How to use
Insert the QSFP28 plug into the QSFP28 port on the switch or device and insert each SFP28 connector into the target SFP28 ports on servers, NICs or other switches. Ensure both ends are fully seated and that the host devices are configured for the intended link speed and breakout mode if required. No external power or configuration is required for the cable itself; link negotiation and speed settings are handled by the connected equipment. Handle the cable by the connectors and avoid excessive bending radii to maintain signal integrity.
Usage recommendations
Use this passive DAC for short-distance, high-bandwidth links where low latency and power efficiency are important. Verify switch compatibility with passive DAC assemblies and enable proper breakout or port mapping on devices when connecting a single QSFP28 to multiple SFP28 interfaces. Maintain tidy routing in dense racks and avoid sharp bends to preserve performance and longevity.

## 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 31.07.2026 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/4466094/59853023_large.webp