# Direct Attach Cable CBO DAC-QSFP-40G-0.5M-BL 0.5 m QSFP male to QSFP male 40 Gbit/s

**URL:** https://aio.lv/en/product--blueoptics-dac-qsfp-40g-05m-bl--4465125
**Data updated:** 2026-02-25 16:30 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** DAC-QSFP-40G-0.5M-BL
**EAN:** 4063232010014
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 78.99 €
**Prices and availability valid until:** 2026-08-09 23:59
**Price without VAT (21%):** 65.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-dac-qsfp-40g-05m-bl--4465125

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.08.2026 | free |
| Pickup points | 12.08.2026 | 1.89 EUR |
| Courier delivery to door | 12.08.2026 | 4.99 EUR |

## Summary description

Passive direct attach copper (DAC) cable CBO DAC-QSFP-40G-0.5M-BL is a 0.5 metre QSFP male-to-QSFP male assembly supporting 40 Gbit/s. Designed for short-reach high-speed interconnects between switches, servers and network equipment with QSFP ports. Provides low-latency, energy-efficient connectivity for top-of-rack and blade server environments.

## Long description

Direct Attach Cable CBO DAC-QSFP-40G-0.5M-BL is a 0.5 metre passive copper QSFP-to-QSFP assembly that supports aggregate data rates up to 40 Gbit/s. It is intended for short-reach, high-bandwidth interconnects in data centre and enterprise network environments, providing a compact, low-latency connection between devices with QSFP ports. The cable's short length and passive design minimise power consumption and signal processing overhead while delivering reliable electrical performance for top-of-rack switches, server cages and blade chassis.
Advantages
This passive direct attach cable offers a simple plug-and-play connection without the need for optical transceivers, reducing component count and operational costs. Its QSFP male connectors on both ends ensure compatibility with standard QSFP ports and a secure physical fit. The 0.5 m length is suitable for close-proximity links, helping to reduce cable clutter and improve airflow in rack installations. The copper assembly provides consistent latency and energy-efficient operation compared with active or optical alternatives for very short links.
Suitable for
Short-reach links between top-of-rack switches
Interconnects between blade servers and fabric switches
High-bandwidth uplinks in switch stacks
Direct server-to-switch connections in dense rack deployments
Key specifications
Connector type: QSFP male to QSFP male
Length: 0.5 metre
Maximum data rate: 40 Gbit/s aggregate
Cable type: Passive copper direct attach
Typical use: Short-reach, in-rack connections
How to use
Ensure both network devices are powered down or follow hot-plugging guidelines from the equipment manufacturer. Align each QSFP connector with the corresponding port and insert firmly until the connector latch engages. Verify link status through device LEDs or management interfaces after powering devices if they were shut down. For removal, release the connector latch and pull straight out to avoid damaging port contacts. Use quality port handling practices to prevent contamination or mechanical stress on ports and connectors.
Usage recommendations
Use this cable for in-rack connections where short distance and low latency are priorities. Avoid routing the cable near sources of strong electromagnetic interference and keep bend radii within the manufacturer’s guidelines to maintain signal integrity and connector life.

## FAQ

### How much does the CBO DAC-QSFP-40G-0.5M-BL 0.5 m QSFP 40 Gbit/s cost, and is it available for purchase?

The price is 78.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 118 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 07.08.2026 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/4465125/59873760_large.webp