# DAC cable CBO AT-QSFP28-3CU 3 m passive QSFP28 to QSFP28

**URL:** https://aio.lv/en/product--blueoptics-at-qsfp28-3cu-bl--4465080
**Data updated:** 2026-02-25 16:30 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** AT-QSFP28-3CU-BL
**EAN:** 4063232145235
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 134.49 €
**Prices and availability valid until:** 2026-08-06 23:59
**Price without VAT (21%):** 111.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-at-qsfp28-3cu-bl--4465080

## 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

Passive DAC (Direct Attach Copper) cable CBO AT-QSFP28-3CU is a 3-meter twin-axial copper interconnect with QSFP28 connectors on both ends. Designed for high-speed server, switch and storage interconnections supporting QSFP28 ports, it provides a low-latency, cost-effective short-reach connection suitable for racks and data center top-of-rack links.

## Long description

Passive DAC (Direct Attach Copper) cable BlueOptics AT-QSFP28-3CU is a 3 m twin-axial copper interconnect with QSFP28 connectors on both ends. Designed for short-reach, high-bandwidth links in racks and data center top-of-rack deployments, this cable supports QSFP28 ports to enable 100Gbps-class connections with low latency and predictable electrical performance. The all-in-one cable assembly removes the need for separate transceivers for direct server, switch and storage interconnection where copper connectivity is appropriate.
Advantages
This 3 m passive QSFP28 to QSFP28 cable delivers low power consumption compared with active solutions and eliminates the need for SFP/QSFP transceivers, reducing overall hardware cost and complexity. Its twin-ax copper construction maintains signal integrity across the short link and provides reliable, deterministic performance for latency-sensitive applications. The pre-terminated QSFP28 plugs simplify installation and reduce rack cabling clutter.
Suitable for
 Top-of-rack switch-to-switch or switch-to-server links
 Direct attach connections between servers and storage systems within the same rack
 Short-reach connections in data centers and network closets
Key specifications
 Cable type: passive twin-axial copper
 Connector type: QSFP28 to QSFP28
 Length: 3 m
 Supported data rate: up to 100 Gbps aggregate (QSFP28 standard)
 Typical use: short-reach, rack-level interconnects
 Form factor: pre-terminated cable assembly with integrated plugs
How to use
Verify both equipment ports support passive QSFP28 DAC cables and are configured for the same data rate and lane mapping. Align the QSFP28 connector keying with the port, insert the plug straight into the QSFP28 cage until it seats, and secure any latch mechanism if present. For cable removal, release the latch and pull the cable straight out to avoid damaging the connector or port. Use the cable within rack and enclosure pathways that do not exceed the specified length and avoid tight bends that could stress the cable assembly.
Usage recommendations
Use this passive QSFP28 to QSFP28 DAC in short-distance scenarios where 3 m copper connectivity provides sufficient performance and lower cost compared with fiber or active optical solutions. Avoid deploying this cable in environments requiring longer reach or where electromagnetic interference may affect copper links; in such cases choose appropriate active or fiber options.

## FAQ

### How much does the DAC cable CBO AT-QSFP28-3CU 3 m 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 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/4465080/59862843_large.webp