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

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-ao-bl--4466067
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-AO-BL
**EAN:** 4063232122885
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-08-06 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-ao-bl--4466067

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 05.08.2026 | free |
| Pickup points | 10.08.2026 | 1.89 EUR |
| Courier delivery to door | 10.08.2026 | 4.99 EUR |

## Summary description

CBO Q28-4S28-DAC-3M is a 3-meter QSFP28 direct attach copper (DAC) cable designed for high-speed 100GbE connections between compatible QSFP28 ports. It provides a fixed, low-latency link for switches, routers and servers without the need for optical transceivers. Ideal for short-reach interconnects in data centers and rack-to-rack deployments, offering simple plug-and-play installation.

## Long description

CBO Q28-4S28-DAC-3M is a 3-meter QSFP28 direct attach copper (DAC) cable engineered for 100GbE connections between compatible QSFP28 ports. The cable provides a fixed electrical link for high-speed data transfer between switches, routers and servers, eliminating the need for optical transceivers. Its short-reach design is intended for data centre and rack-to-rack interconnects where low latency and reliable throughput are required.
Advantages
The DAC cable delivers a cost-effective and energy-efficient alternative to optical modules for short distances, with minimal latency and stable signal integrity. Its plug-and-play form factor simplifies installation and reduces the number of components in the network path. Constructed for compatibility with QSFP28 interfaces, the cable supports high-density rack deployments and helps maintain predictable performance in demanding 100GbE environments.
Suitable for
Short-reach 100GbE connections between switches in the same rack
Rack-to-rack interconnects within data centre rows
Direct links between servers and top-of-rack switches
High-density aggregation and spine-leaf architectures
Key specifications
Interface type: QSFP28 to QSFP28 direct attach copper
Cable length: 3 m
Data rate: supports 100 Gigabit Ethernet
Transmission medium: copper twinax for short-reach connections
Latency: low fixed electrical latency suitable for time-sensitive traffic
Connector: integrated QSFP28 plug ends for direct port insertion
How to use
Insert each QSFP28 connector into the corresponding QSFP28 port on the network devices until the latch engages. Ensure the cable is routed without sharp bends and secured to avoid strain on the connectors. No additional transceivers or configuration are required in most environments; the connected devices should detect the link automatically and negotiate the appropriate 100GbE parameters. Verify link status via device management interfaces after installation.
Usage recommendations
Use this DAC cable for short-distance interconnects where optical conversion is unnecessary. Maintain bend radius recommendations, keep cable length appropriate to the deployment, and avoid running the cable alongside high-voltage power lines to reduce interference. For mixed-vendor environments, check device compatibility lists to ensure proper operation.

## FAQ

### How much does the DAC cable CBO Q28-4S28-DAC-3M QSFP28 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 05.08.2026 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/4466067/59856150_large.webp