# BlueOptics QDD-400-CU1M-BL InfiniBand/fibre optic cable 1 m QSFP-DD Male/Male

**URL:** https://aio.lv/en/product--blueoptics-qdd-400-cu1m-bl--8373420
**Data updated:** 2026-03-07 15:17 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QDD-400-CU1M-BL
**EAN:** 4063232289021
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 221.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 183.46 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qdd-400-cu1m-bl--8373420

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 27.07.2026 | free |
| Pickup points | 30.07.2026 | 1.89 EUR |
| Courier delivery to door | 30.07.2026 | 4.99 EUR |

## Summary description

The BlueOptics QDD-400-CU1M-BL is a 1 m InfiniBand/fibre optic cable featuring QSFP-DD connectors. Designed for high-speed data transmission, it ensures reliable connectivity in data centers and networking environments. The cable's male/male configuration allows for easy connection between devices, making it ideal for high-performance computing applications.

## Long description

The BlueOptics QDD-400-CU1M-BL InfiniBand/fibre optic cable 1 m QSFP-DD Male/Male is a 1-metre direct attach cable with QSFP-DD connectors designed for high-speed short-range interconnects. It implements a passive twinax copper design compliant with 400GBase-CR4 and the QSFP-DD multisource agreement (MSA) form factor to provide reliable electrical connectivity between compatible switches, routers, storage systems and compute nodes. The cable supports multi-protocol environments including Ethernet, Fibre Channel and InfiniBand at speeds up to 400 Gbps on short links where direct attach twinax is appropriate.
Advantages
The cable offers a compact, low-latency connection with low power consumption typical of passive direct attach twinax solutions. It is manufactured to industry MSA standards and uses high-quality components to achieve stable signal integrity and extended service life. As a short-range 1 m QSFP-DD male-to-male cable, it enables simple rack-to-rack or in-rack links without transceivers, reducing hardware complexity and total cost of ownership compared with optical modules for equivalent short distances.
Suitable for
High-performance computing clusters and server interconnects
Top-of-rack and adjacent-rack links in data centers
Switch-to-switch, switch-to-router and switch-to-storage connections
Environments requiring low-latency, high-bandwidth short-distance links
Key specifications
Connector type: QSFP-DD male to QSFP-DD male
Length: 1 metre
Transmission standard: 400GBase-CR4 (passive twinax copper)
Supported protocols: Ethernet, Fibre Channel, InfiniBand
Cable gauge: 26 AWG twinax conductors
MSA-compliant QSFP-DD form factor
Designed for short-range direct attach applications with low latency and low power consumption
How to use
Ensure both devices support passive QSFP-DD direct attach twinax cables and the 400GBase-CR4 transmission mode before installation. Power down or follow hot-plug guidelines of your hardware if required by the vendor. Align each QSFP-DD connector with the corresponding port and insert firmly until the latch engages. Verify link status through the device management interface and confirm negotiated speed and protocol. For removal, release the latch and withdraw the connector straight out to avoid stressing the cable or port.
Usage recommendations
Use this 1 m QSFP-DD passive twinax cable for short-distance connections inside racks or between adjacent racks. Avoid tight bends and maintain the manufacturer’s minimum bend radius. Do not exceed the intended application distance and confirm compatibility with your hardware vendor’s supported cable types to ensure expected performance.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.15 kg |
| Package weight | 160 g |
| Operating temperature (T-T) | 0 - 70 |
| Cable length | 1 m |
| Data transfer rate | 400 Gbit/s |
| Product colour | Black, Silver |
| Connector 1 | QSFP-DD |
| Connector 2 | QSFP-DD |
| AWG wire size | 26 |
| Warranty period | 5 year(s) |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand cable BlueOptics QDD-400-CU1M-BL cost, and is it available for purchase?

The price is 221.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 21 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 27.07.2026 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/8373420/64376435_large.webp