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

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-3m-rw-bl--4466865
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-3M-RW-BL
**EAN:** 4063232102085
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 134.49 €
**Prices and availability valid until:** 2026-08-05 23:59
**Price without VAT (21%):** 111.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp28-dac-3m-rw-bl--4466865

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.08.2026 | free |
| Pickup points | 06.08.2026 | 1.89 EUR |
| Courier delivery to door | 06.08.2026 | 4.99 EUR |

## Summary description

3 m passive copper DAC cable CBO QSFP28-DAC-3M designed for QSFP28 ports. This direct-attach copper assembly provides a short-reach, cost-effective connectivity option for switches, routers and servers that support QSFP28 modules. Passive design requires no additional power or optics, simplifying installation and reducing latency for high-density data center links.

## Long description

The BlueOptics DAC cable CBO QSFP28-DAC-3M is a 3 metre passive copper direct-attach cable engineered for QSFP28 ports. Designed for short-reach connections, this QSFP28 DAC assembly provides a low-latency, cost-effective link between switches, routers and servers that support QSFP28 interfaces. Its passive copper construction eliminates the need for optical transceivers or additional power, simplifying rack-level cabling and enabling high-density connectivity in data centre top-of-rack and aggregation environments.
Advantages
The passive design delivers low power consumption and minimal latency compared with active optical or transceiver-based solutions. A fixed 3 m length reduces signal reflections and insertion loss for short links while offering plug-and-play compatibility with standard QSFP28 ports. The cable assembly is space-efficient for dense installations and lowers total cost of ownership by removing separate transceivers or external power requirements.
Suitable for
Top-of-rack switch-to-switch connections in data centres
Server-to-switch short-reach interconnects
Aggregation or spine links within network racks
High-density deployments requiring low-latency copper connectivity
Key specifications
Connector type: QSFP28 to QSFP28 direct-attach copper
Cable length: 3 m
Passive construction (no active electronics or external power)
Suitable for 100 Gbps QSFP28 interfaces (short-reach applications)
Form factor: twinax cable with QSFP28 module assemblies
Designed for rack-level, short-distance links
How to use
Install the DAC cable by inserting each QSFP28 plug into the corresponding QSFP28 port on your networking equipment until the latch engages. Ensure both devices are powered off or follow hot-plug procedures recommended by the equipment vendor before insertion or removal. The passive DAC is recognized by QSFP28-compliant ports and requires no firmware or driver configuration beyond standard port setup in your switch or server management interface.
Usage recommendations
Use this 3 m passive QSFP28 DAC for short, rack-level connections where 100 Gbps performance and low latency are required. Avoid routing the cable tightly around sharp edges or kinking the twinax bundle; maintain gentle bend radii and secure the cable to prevent strain on the QSFP28 plugs. Verify compatibility with your switch or server vendor’s QSFP28 port guidance and operate within the recommended ambient temperature range for your equipment.

## FAQ

### How much does the CBO QSFP28-DAC-3M 3 m DAC cable cost, and is it available for purchase?

The price is 134.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 337 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 03.08.2026 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/4466865/59860598_large.webp