# BlueOptics QSFP-H40G-CU4M-BL InfiniBand/fibre optic cable 5 m Black

**URL:** https://aio.lv/en/product--blueoptics-qsfp-h40g-cu4m-bl--5038457
**Data updated:** 2026-03-07 15:11 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP-H40G-CU4M-BL
**EAN:** 4063232145006
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 173.49 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 143.38 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp-h40g-cu4m-bl--5038457

## 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 QSFP-H40G-CU4M-BL is a 5 m InfiniBand/fibre optic cable designed for high-speed data transfer. It features QSFP connectors on both ends, ensuring compatibility with various devices. This cable is ideal for data centers and networking applications where reliable and fast connections are crucial.

## Long description

The BlueOptics QSFP-H40G-CU4M-BL is a 5 m passive Direct Attach Cable (DAC) with QSFP-to-QSFP connectors designed for short-range, high-speed interconnects. It provides a 40GBase-CR4 electrical connection using twinax copper construction and is suitable for InfiniBand and Ethernet environments that accept QSFP 40G DAC modules. The cable is black, 5 meters in length and intended for rack-to-rack or within-rack links where low latency and low power consumption are required.
Advantages
This 40G twinax DAC offers a straightforward plug-and-play solution with QSFP connectors on both ends, enabling fast installation in compatible networking and storage equipment. As a passive cable, it requires no external power and has low latency and low power draw. The cable follows MSA-compliant QSFP form-factor guidelines and is manufactured using components and construction methods that target reliable long-term operation in data center environments.
Suitable for
Short-range links between switches and routers within or between adjacent racks
Server-to-switch and storage-to-switch connections in data centres
InfiniBand and 40G Ethernet (40GBase-CR4) interconnects
Key specifications
Interface: QSFP-to-QSFP connectors
Nominal speed: up to 40 Gbps aggregate
Medium: passive twinax copper (DAC)
Length: 5 metres
Wire gauge: 30 AWG twinax conductor
Colour: black
Form-factor compliance: QSFP MSA compatible
How to use
Install the cable by inserting each QSFP connector into the corresponding QSFP port on the devices to be linked, ensuring both ends seat fully and the latch engages. Use this passive DAC for short-distance links where the connected hardware supports passive 40G QSFP twinax cables. Verify link status in device management interfaces after physical installation and confirm that the host systems are configured for the intended 40GBase-CR4 or InfiniBand protocol.
Usage recommendations
For reliable operation, avoid tight bends and excessive mechanical stress on the cable, maintain proper airflow in the rack, and ensure the connected devices officially support passive QSFP 40G DACs. Use within the specified short-range environment; for longer distances consider active DACs or optical transceivers with fiber cabling.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.15 kg |
| Package weight | 160 g |
| Cable length | 5 m |
| Data transfer rate | 40 Gbit/s |
| Product colour | Black |
| Connector 1 | QSFP |
| Connector 2 | QSFP |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand cable BlueOptics QSFP-H40G-CU4M-BL cost, and is it available for purchase?

The price is 173.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 47 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

### Where can I download the instructions for InfiniBand cable BlueOptics QSFP-H40G-CU4M-BL?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/5038457/64336479_large.webp