# InfiniBand/fibre optic cable BlueOptics DEM-CB100Q28-3-BL 3 m QSFP28 Male/Male

**URL:** https://aio.lv/en/product--blueoptics-dem-cb100q28-3-bl--4464863
**Data updated:** 2026-02-25 16:30 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** DEM-CB100Q28-3-BL
**EAN:** 4063232145259
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 134.49 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 111.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-dem-cb100q28-3-bl--4464863

## 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

The BlueOptics DEM-CB100Q28-3-BL is a 3 m InfiniBand/fibre optic cable designed for high-speed data transmission. It features QSFP28 connectors on both ends, ensuring reliable connectivity for data centers and high-performance computing environments. The male/male configuration allows for easy installation and compatibility with various devices.

## Long description

The BlueOptics DEM-CB100Q28-3-BL is a 3 m InfiniBand/fibre optic direct attach solution with QSFP28 male connectors on both ends. Designed for short-reach 100G interconnects, this cable implements a 100GBase-CR4 compatible twinax copper/DA C form factor suitable for high-density rack and adjacent-rack connections. It supports common high-speed protocols and is intended for use in data centers and high-performance computing environments where low latency and reliable 100 Gbps links are required.
Advantages
This 3 m QSFP28 male-to-male cable provides a low-power, low-latency physical link optimized for short-distance, high-bandwidth connections. The passive direct-attach design eliminates the need for active transceivers, reducing cost and power consumption while simplifying installation. Manufactured to MSA-compliant mechanical and electrical standards and assembled with high-quality components, it offers stable performance across supported hardware platforms and is tested for compatibility with major network devices that accept 100GBase-CR4 twinax connections.
Suitable for
Short-reach 100 Gbps links between switches and routers inside racks
Interconnects between adjacent server or switch racks
High-performance computing clusters and InfiniBand fabrics
Storage systems and SAN top-of-rack connections supporting 100G
Key specifications
Length: 3 meters
Connector type: QSFP28 male to QSFP28 male
Nominal data rate: up to 100 Gbps (100GBase-CR4 compatible)
Cable type: passive direct attach (twinax copper)
Wire gauge: 26 AWG
Compliant with QSFP28 and MSA mechanical/electrical profiles
How to use
Install the cable by inserting each QSFP28 male connector into corresponding QSFP28 ports on networking equipment until the connectors engage securely. Ensure both devices support passive 100GBase-CR4 twinax connections; consult device documentation if necessary. Route the cable to avoid sharp bends and mechanical strain; maintain recommended bend radius for twinax cable to preserve signal integrity. No additional power or configuration is required for the passive cable itself, but verify link negotiation and speed settings on connected devices as part of standard network commissioning.
Usage recommendations
For reliable operation, use this cable only for short-distance links as specified; avoid extending beyond rack-to-rack spans where 3 m is insufficient. Keep the cable away from high EMI sources and secure it with suitable cable management to prevent damage. Before deployment in production, confirm compatibility with your switch or server platform and, if available, test a sample link to verify performance under your workload.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.15 kg |
| Package weight | 160 g |
| Cable length | 3 m |
| Data transfer rate | 100 Gbit/s |
| Product colour | Black, Silver |
| Connector 1 | QSFP28 |
| Connector 2 | QSFP28 |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand/fibre optic cable BlueOptics DEM-CB100Q28-3-BL 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/4464863/64289445_large.webp