# InfiniBand/fibre optic cable BlueOptics QSFP28-DAC-0.5M-LE-BL 0.5m Male/Male

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-le-bl--4466750
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-0.5M-LE-BL
**EAN:** 4063232100678
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 104.49 €
**Prices and availability valid until:** 2026-08-07 23:59
**Price without VAT (21%):** 86.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp28-dac-05m-le-bl--4466750

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.08.2026 | free |
| Pickup points | 11.08.2026 | 1.89 EUR |
| Courier delivery to door | 11.08.2026 | 4.99 EUR |

## Summary description

The BlueOptics QSFP28-DAC-0.5M-LE-BL is a 0.5 meter InfiniBand/fibre optic cable featuring QSFP28 Male connectors on both ends. It is designed for high-speed data transfer in data centers and networking applications, ensuring reliable performance and low latency. This cable is ideal for connecting switches, servers, and other devices in high-performance computing environments.

## Long description

The BlueOptics QSFP28-DAC-0.5M-LE-BL is a 0.5 meter QSFP28 direct attach cable (DAC) designed for short-range 100G connectivity in data center and high-performance computing environments. With QSFP28 male connectors on both ends and a twinax copper construction, this cable supports low-latency, high-throughput links between switches, servers and storage systems that support 100GBase-CR4 and InfiniBand protocols. It is intended for rack-to-rack or within-rack connections where passive DAC solutions are supported by the hardware.
Advantages
This QSFP28 DAC provides a compact, low-power and low-latency physical link suitable for short distances up to 0.5 m. Its passive twinax construction eliminates the need for active electronics in the cable, reducing power consumption and failure points. The cable is MSA-compliant and built from industry-standard high-quality components to ensure stable signal transmission and long service life in professional network installations.
Suitable for
High-speed links between switches and servers within racks
Interconnects between adjacent racks in data centers
100GBase-CR4, Ethernet and InfiniBand connections that accept passive QSFP28 DACs
Short-reach connections for storage systems and compute clusters
Key specifications
Connector type: QSFP28 male to QSFP28 male
Cable length: 0.5 meter
Transmission: passive twinax copper (DAC)
Supported data rates: up to 100 Gbit/s
Wire gauge: 30 AWG
Standards: MSA-compliant; compatible with 100GBase-CR4 and InfiniBand profiles where passive DACs are supported
How to use
Confirm that both devices support passive QSFP28 DAC connections and the targeted protocol (for example 100GBase-CR4 or an InfiniBand profile). With both ends powered off or operating under normal hot-plug conditions per vendor guidance, insert each QSFP28 connector into the corresponding port until it latches. Verify link status on the connected devices and monitor for expected data rates and error counts. For best results, route the cable to avoid excessive bending and mechanical stress near the connector.
Usage recommendations
Use this 0.5 m passive QSFP28 DAC for short-reach, high-bandwidth connections where the hardware explicitly supports passive twinax cables. Avoid installing the cable in environments that require longer reach or optical fiber. Maintain gentle bend radii, keep connectors clean and ensure firmware and port settings on switches and servers are configured for 100G passive DAC operation.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.15 kg |
| Package weight | 160 g |
| Cable length | 0.5 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 QSFP28-DAC-0.5M-LE-BL cost, and is it available for purchase?

The price is 104.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 226 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 06.08.2026 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/4466750/64293559_large.webp