# CBO DAC cable Q28-4S28-DAC-3M 3m QSFP28 compatible direct-attach copper cable

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-ee-bl--4466074
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-EE-BL
**EAN:** 4063232122908
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-08-10 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-ee-bl--4466074

## 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

CBO Q28-4S28-DAC-3M is a 3-meter Direct-Attach Copper (DAC) cable compatible with QSFP28 ports. Designed for short-reach high-speed interconnects, it provides a low-latency, cost-effective link between servers, switches and storage devices supporting 100GbE or native QSFP28 interfaces. Ideal for data center patching, top-of-rack connections and rack-to-rack links where a fixed-length copper solution is appropriate.

## Long description

The CBO DAC cable Q28-4S28-DAC-3M is a 3-meter Direct-Attach Copper (DAC) cable compatible with QSFP28 ports, engineered for short-reach, high-speed interconnects. It supports native QSFP28 interfaces and 100 Gigabit Ethernet links, providing a low-latency, single-cable solution for connecting servers, switches and storage devices in dense networking environments. The fixed-length copper assembly simplifies cabling management where fiber transceivers are unnecessary and offers a predictable electrical connection for top-of-rack and rack-to-rack installations.
Advantages
This QSFP28 compatible DAC cable delivers low latency and high throughput for 100GbE applications while eliminating the need for separate transceivers. The 3 m length balances reach and signal integrity for short data center links, and the direct-attach design reduces power consumption compared with optical alternatives. The cable is suitable for high-density racks, allowing tidy routing and straightforward replacement with identical fixed-length assemblies.
Suitable for
Top-of-rack (ToR) switch to server connections
Rack-to-rack high-speed links within the same equipment room
Patch panels and short interconnects in data centers
Low-latency connections between storage arrays and compute nodes
Key specifications
Connector type: QSFP28 compatible direct-attach copper
Cable length: 3 meters
Supported data rate: 100 Gigabit Ethernet (100GbE) / native QSFP28
Transmission medium: twinax copper cable (direct-attach)
Latency: low, suitable for short-reach, high-performance links
Power profile: lower power consumption compared with optical transceiver plus fiber
How to use
Insert each QSFP28-compatible connector into the corresponding port on network devices until it latches securely. Ensure both ends are fully seated and that link LEDs on the devices indicate an active connection. Route the 3 m cable to avoid sharp bends and mechanical strain; maintain recommended bend radius to preserve signal integrity. For best results, verify compatibility with the equipment vendor's QSFP28 ports and configure network interfaces according to standard 100GbE settings.
Usage recommendations
Use this fixed-length DAC cable for short, high-speed links where fiber optics are unnecessary. Keep the cable within the same rack or adjacent racks to maintain signal quality. Avoid exposure to excessive heat sources and prevent repeated flexing at connector ends to extend service life.

## FAQ

### How much does the CBO DAC cable Q28-4S28-DAC-3M 3m QSFP28 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/4466074/59857223_large.webp