# DAC cable CBO SFP28-DAC-3M 3 m compatible with QNAP SFP28 direct-attach copper cable

**URL:** https://aio.lv/en/product--blueoptics-sfp28-dac-3m-qn-bl--4471309
**Data updated:** 2026-02-25 16:35 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFP28-DAC-3M-QN-BL
**EAN:** 4063232099750
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 85.99 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 71.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfp28-dac-3m-qn-bl--4471309

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 28.07.2026 | free |
| Pickup points | 31.07.2026 | 1.89 EUR |
| Courier delivery to door | 31.07.2026 | 4.99 EUR |

## Summary description

CBO SFP28-DAC-3M is a 3-meter direct-attach copper (DAC) cable compatible with QNAP SFP28 ports. Designed for short-reach 25GbE connections, it provides a low-latency, cost-effective link between switches, servers or storage devices. The passive copper cable requires no transceivers, simplifies rack cabling and is suitable for data center top-of-rack and server-to-switch interconnects.

## Long description

BlueOptics CBO SFP28-DAC-3M is a 3-meter direct-attach copper (DAC) cable compatible with QNAP SFP28 ports, intended for short-reach 25GbE connections. The passive copper assembly eliminates the need for separate transceivers, enabling a compact and cost-efficient physical link between switches, servers and storage appliances. The cable is designed for low-latency, high-density rack environments and simplifies top-of-rack and server-to-switch cabling.
Advantages
The CBO SFP28-DAC-3M offers plug-and-play connectivity with low electrical latency and stable signal integrity over its 3 m copper length. As a passive DAC, it reduces component count and power consumption compared with active optical assemblies and transceiver-based solutions. Its fixed length and integrated connectors provide consistent performance for short-distance 25GbE links and streamline installation in data centers and network racks.
Suitable for
Top-of-rack switch to server 25GbE connections
Server-to-storage interconnects in rack environments
High-density switch-to-switch links within the same equipment room
Short-reach connections in data center and lab setups
Key specifications
Connector type: SFP28 direct-attach copper
Cable length: 3 m
Supported link speed: 25 Gigabit Ethernet (25GbE)
Cable medium: Passive copper twinax
Typical use case: Short-reach, low-latency interconnects
Compatibility: Designed for SFP28 ports on compatible QNAP equipment
How to use
Insert each SFP28 connector into the corresponding SFP28 cage on the devices to be linked, ensuring the latch engages. No additional transceivers, configuration or power source is required for the passive cable; link settings are handled by the connected devices. After physical installation, verify link status and negotiated speed on both endpoints and adjust interface settings in the device management interfaces if necessary.
Usage recommendations
For reliable operation, use the cable within its 3 m range and avoid kinking or tight bends. Install within the same rack or adjacent racks to stay within the intended short-reach use. Confirm firmware and driver compatibility of connected QNAP devices and check port settings to ensure a stable 25GbE link.

## FAQ

### How much does the CBO SFP28-DAC-3M 3 m DAC cable for QNAP cost, and is it available for purchase?

The price is 85.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 299 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 28.07.2026 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/4471309/59853615_large.webp