# DAC cable CBO QSFP28-4SFP28-DAC-3M 3 m passive copper direct-attach

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-rw-bl--4466093
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-RW-BL
**EAN:** 4063232123165
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-08-11 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-rw-bl--4466093

## 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 copper DAC cable CBO QSFP28-4SFP28-DAC-3M, 3 meters, designed for direct-attach connections between a QSFP28 port and up to four SFP28 ports. Provides a fixed, low-latency physical link for short-reach high-speed networking, suitable for switches, routers and servers in rack environments. Ideal for data centre top-of-rack and adjacent rack connections where a cost-effective, low-power, plug-and-play cable is required.

## Long description

Passive copper DAC cable CBO QSFP28-4SFP28-DAC-3M is a 3-meter direct-attach cable engineered to connect a single QSFP28 port to up to four SFP28 ports. It provides a fixed physical link with low latency and minimal power consumption for short-reach 100G to 4×25G or similar breakout configurations. The cable is intended for use in rack-mounted networking equipment such as switches, routers and servers where reliable, plug-and-play connectivity is required.
Advantages
This passive DAC cable offers low insertion loss and deterministic latency suitable for high-speed, short-distance links in data centre environments. Its passive copper construction eliminates the need for additional power or transceivers at each end, reducing operational power and heat. The cable’s breakout design simplifies linking a 100G QSFP28 interface to multiple 25G SFP28 ports without additional breakout modules, enabling compact, cost-efficient deployments.
Suitable for
 Top-of-rack and adjacent rack connections in data centres
 Connecting QSFP28 ports to multiple SFP28 ports for breakout configurations
 Short-reach links between switches, routers and servers within the same rack or nearby racks
 Low-latency, high-throughput 100G networking applications
Key specifications
 Length: 3 meters
 Connector configuration: QSFP28 to 4 × SFP28 (breakout)
 Media type: passive copper direct-attach
 Data rates supported: 100G to 4×25G breakout or equivalent 25G links
 Typical use: short-reach links within racks and between adjacent racks
 Form factor: direct-attach cable with fixed connectors
How to use
Install the cable by firmly inserting the QSFP28 end into the host QSFP28 port and each SFP28 plug into the corresponding SFP28 ports on the target device. Ensure devices are powered down or ports are in a safe state if required by your equipment’s installation procedure, then power up and verify link status through the device management interface. No additional modules or power supplies are required for the passive copper DAC; the connection is plug-and-play on compatible ports. Verify link speed and lane mapping on the switch or server to confirm the intended breakout configuration is active.
Usage recommendations
Use this DAC cable for short-distance, high-speed connections inside racks or between adjacent racks. Avoid running the cable near sources of strong electromagnetic interference and do not exceed the bending radius specified by the manufacturer to maintain signal integrity and mechanical reliability.

## FAQ

### How much does the DAC cable CBO QSFP28-4SFP28-DAC-3M 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/4466093/59856154_large.webp