# DAC cable CBO QSFP28-4SFP28-DAC-3M 3 m passive direct-attach for QSFP28 to 4×SFP28

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-fr-bl--4466076
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-FR-BL
**EAN:** 4063232122984
**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-fr-bl--4466076

## 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 DAC cable CBO QSFP28-4SFP28-DAC-3M is a 3-meter direct-attach copper assembly that breaks out a QSFP28 port to four SFP28 ports. Designed for short-reach high-speed interconnects, it supports QSFP28 and SFP28 compatible devices for server, switch or storage connections in data centers. Benefits include low latency, no external power, and simple plug-and-play installation.

## Long description

Passive DAC cable CBO QSFP28-4SFP28-DAC-3M is a 3 meter direct-attach copper assembly that breaks out a single QSFP28 port into four SFP28 ports. It is designed for short-reach, high-speed interconnects in data centre topologies where low latency and compact cabling are required. The cable provides a fixed, low-loss connection between compatible QSFP28 and SFP28 devices without the need for external power or optical transceivers.
Advantages
This passive DAC delivers low latency and predictable signal behaviour for 100G to 4×25G breakout applications. The 3 m length is suitable for rack-to-rack or within-rack connections while avoiding the cost and complexity of transceivers and fibre patching. As a direct-attach copper assembly, it requires no additional power source and supports straightforward plug-and-play installation in QSFP28 and SFP28 ports that accept passive DACs.
Suitable for
Breaking out a 100G QSFP28 port into four 25G SFP28 ports for server or switch connectivity
Short-reach connections within racks or between adjacent racks in data centres
High-density switch-to-server or switch-to-switch links where cable management and low latency matter
Environments where optical transceivers are not required or where cost-effective copper interconnects are preferred
Key specifications
Form factor: QSFP28 to 4×SFP28 breakout direct-attach cable
Type: Passive copper assembly (direct-attach cable)
Length: 3 m
Supported data rates: 100G (QSFP28) to 4×25G (SFP28) breakout operation
Latency: Low, fixed propagation delay typical of direct-attach copper
Compatibility: Devices with QSFP28 and SFP28 ports that accept passive DACs
Installation: Plug-and-play, no external power or transceivers required
How to use
Insert the QSFP28 connector into the QSFP28 port on the source device and plug the four SFP28 connectors into the corresponding SFP28 ports on the destination device(s). Ensure both devices support passive DAC connections and that port configurations match the intended breakout mapping. Handle the cable by the connector housings to avoid strain on the cable conductors and route the assembly to maintain proper bend radii and cable management within the rack.
Usage recommendations
For reliable performance, verify device compatibility and firmware support for 100G-to-4×25G breakout mode before deployment. Use the 3 m length for short-reach interconnects; avoid excessive bending and secure connectors to prevent accidental disconnection. Where electrical isolation or longer distances are required, consider optical transceivers and fibre cabling instead.

## FAQ

### How much does the CBO QSFP28-4SFP28-DAC-3M passive 3m DAC cable 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/4466076/59855165_large.webp