# CBO DAC cable QSFP-40G-C0.5M 40Gbps direct-attach copper, QSFP+ to QSFP+, 0.5 m

**URL:** https://aio.lv/en/product--blueoptics-qsfp-40g-c05m-bl--4466297
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP-40G-C0.5M-BL
**EAN:** 4063232010007
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 78.99 €
**Prices and availability valid until:** 2026-08-07 23:59
**Price without VAT (21%):** 65.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp-40g-c05m-bl--4466297

## 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

Direct-attach CBO DAC cable QSFP-40G-C0.5M provides a 40Gbps QSFP+ to QSFP+ copper connection over a fixed 0.5 m length. Designed for short-reach high-speed interconnects in data centers, switches and servers, it offers plug-and-play installation, low latency and reduced power compared with optical transceivers. Suitable for spine-leaf links, switch stacking and server uplinks.

## Long description

The CBO DAC cable QSFP-40G-C0.5M is a 40Gbps direct-attach copper (DAC) cable with QSFP+ connectors at both ends and a fixed 0.5 m length. It provides a low-latency, high-bandwidth electrical link for short-reach interconnects in data centers, network switches and server racks. The cable is intended as a plug-and-play alternative to optical transceivers for high-speed links where distances are short and power efficiency is important.
Advantages
This QSFP+ to QSFP+ DAC cable delivers 40Gbps aggregate bandwidth with minimal signal conversion, resulting in reduced power consumption and lower latency compared with equivalent optical solutions. The fixed copper assembly eliminates the need for separate transceivers and fiber patching, simplifying rack cabling and reducing component count. Its short 0.5 m length is optimized for direct interconnects such as switch-to-switch or switch-to-server connections inside a rack or adjacent racks, ensuring a compact and reliable physical connection.
Suitable for
 Short-reach 40Gbps links between switches (spine-leaf and top-of-rack)
 Server uplinks and direct server-to-switch connections
 Switch stacking and intra-rack high-bandwidth connections
 Environments where lower power and minimal latency are required
Key specifications
 Data rate: 40 Gbps aggregate
 Connector type: QSFP+ to QSFP+
 Length: 0.5 m fixed
 Media: Direct-attach copper
 Application: Short-reach electrical interconnects
 Installation: Plug-and-play, no transceivers required
How to use
Install the cable by inserting each QSFP+ connector into the appropriate ports on the network devices until the modules latch. Ensure ports are powered down or follow hot-plug guidelines from the equipment vendor if applicable. After physical installation, verify link status and speed through the host devices or switch management interface. Because the cable is a fixed assembly, no additional configuration is required on the cable itself.
Usage recommendations
Use this 0.5 m DAC cable for intra-rack or adjacent-rack 40Gbps links where short distance, low latency and power efficiency are priorities. Avoid bending the cable sharply beyond the manufacturer’s recommended radius and ensure connectors are kept free of dust and debris when not in use. When connecting different vendors' equipment, verify compatibility with the devices' QSFP+ port firmware and supported link modes.

## FAQ

### How much does the CBO DAC cable QSFP-40G-C0.5M 40Gbps 0.5 m 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 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/4466297/59855173_large.webp