# InfiniBand/fibre optic cable BlueOptics DEM-CB050QXS-BL 0.5 m QSFP Male/Male

**URL:** https://aio.lv/en/product--blueoptics-dem-cb050qxs-bl--4464860
**Data updated:** 2026-02-25 16:30 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** DEM-CB050QXS-BL
**EAN:** 4063232144634
**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-dem-cb050qxs-bl--4464860

## 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

The BlueOptics DEM-CB050QXS-BL is a 0.5 m InfiniBand/fibre optic cable with QSFP Male/Male connectors. It is designed for high-speed data transmission in data centers and networking environments, ensuring reliable connectivity and performance.

## Long description

The BlueOptics DEM-CB050QXS-BL is a 0.5 m InfiniBand/fibre optic direct attach cable with QSFP male-to-male connectors, intended for short-range high-speed links in data centers and networking racks. It supports 40GBase-CR4/40 Gbps applications over a 0.5 m twinax copper connection and is MSA-compliant for use with equipment that accepts QSFP direct attach cables. The cable is designed for low latency, low power consumption and straightforward rack-to-rack or intra-rack connectivity where reliable electrical signal transmission over short distances is required.
Advantages
The cable provides a compact, single-segment connection with QSFP-to-QSFP compatibility enabling 40 Gbps throughput on short runs. As a passive direct attach twinax cable it requires no additional power for signal conversion, resulting in minimal power draw and reduced heat compared with active optical transceivers. The MSA-compliant design and use of high-quality components ensures functional compatibility with major switch, router and storage platforms that support QSFP passive DACs, while the 0.5 m length simplifies tidy rack installations and reduces signal attenuation typical for longer runs.
Suitable for
Connecting QSFP ports between switches within the same rack or adjacent racks
High-density server-to-switch links in data center topologies
Storage area network interconnects requiring 40 Gbps short-reach links
InfiniBand and Ethernet environments supporting 40GBase-CR4
Key specifications
Connector type: QSFP male-to-male
Length: 0.5 meter
Data rate: up to 40 Gbps
Cable type: passive twinax copper (direct attach)
Wire gauge: 30 AWG
Standards compliance: MSA-compliant for QSFP direct attach applications
Typical applications: Ethernet, FCoE, Fibre Channel, InfiniBand short-reach links
How to use
Verify that the network equipment supports passive QSFP direct attach twinax cables and that the QSFP ports are enabled for 40G operation. With both devices powered down or under appropriate hot-plug guidelines from the hardware vendor, align and insert the QSFP plugs into the corresponding QSFP ports until they seat firmly. Confirm link status and negotiate speed through the equipment management interface. Use the cable for short-distance interconnects; do not extend beyond the recommended 0.5 m length for guaranteed 40G performance.
Usage recommendations
To maintain signal integrity and longevity, avoid tight bends and excessive strain on the cable and keep it clear of sharp edges or high-temperature sources. Use the 0.5 m passive twinax cable for direct rack or adjacent-rack connections and select active transceivers or longer-length certified optical cables for greater distances.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.15 kg |
| Package weight | 160 g |
| Operating temperature (T-T) | 0 - 70 |
| Cable length | 0.5 m |
| Data transfer rate | 40 Gbit/s |
| Product colour | Black, Silver |
| Connector 1 | QSFP |
| Connector 2 | QSFP |
| AWG wire size | 30 |
| Warranty period | 5 year(s) |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand/fibre optic cable BlueOptics DEM-CB050QXS-BL 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/4464860/64289444_large.webp