# BlueOptics QSFP-4SFP25G-CU5M-BL InfiniBand fibre optic cable 5 m QSFP28 4xSFP28 Male Male

**URL:** https://aio.lv/en/product--blueoptics-qsfp-4sfp25g-cu5m-bl--5041229
**Data updated:** 2026-02-25 16:38 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP-4SFP25G-CU5M-BL
**EAN:** 4063232641447
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 290.49 €
**Prices and availability valid until:** 2026-08-15 23:59
**Price without VAT (21%):** 240.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp-4sfp25g-cu5m-bl--5041229

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.08.2026 | free |
| Pickup points | 18.08.2026 | 1.89 EUR |
| Courier delivery to door | 18.08.2026 | 4.99 EUR |

## Summary description

The BlueOptics QSFP-4SFP25G-CU5M-BL is a 5 m InfiniBand fibre optic cable featuring a QSFP28 connector on one end and four SFP28 connectors on the other. This cable is designed for high-speed data transmission and is ideal for connecting multiple devices in data centers or networking environments. Its male-to-male configuration ensures compatibility with a wide range of equipment.

## Long description

The BlueOptics QSFP-4SFP25G-CU5M-BL is a 5 m direct-attach twinax cable with a QSFP28 connector on one end and four SFP28 connectors on the other. Designed for short-reach, high-speed interconnects, this passive 100G to 4x25G breakout cable supports InfiniBand and Ethernet signaling for use in racks and between adjacent racks in data center and networking environments. The cable implements a 26 AWG twinax conductor and follows MSA-defined electrical and mechanical interfaces for QSFP28 breakout DACs.
Advantages
This passive DAC provides low latency and low power consumption due to its twinax copper design and lack of active electronics. It is manufactured to industry MSA specifications for QSFP28-to-4xSFP28 breakout applications, enabling interoperability with platforms that support QSFP-4SFP25G-style breakout cables. The cable uses robust components and assembly practices intended to deliver long service life and stable electrical characteristics for short-distance, high-bandwidth links.
Suitable for
High-density switch-to-switch or switch-to-server connections inside racks
Breakout of a 100G QSFP28 port into four 25G SFP28 ports
InfiniBand, Ethernet (100GBase-CR4 / 4x25GBASE-CR) and similar short-reach protocols
Adjacent-rack interconnects where passive DAC is supported by the hardware
Key specifications
Cable type: passive twinax copper (direct attach cable)
Length: 5 meters
Connectors: 1× QSFP28 (male) to 4× SFP28 (male)
Bandwidth: up to 100 Gbit/s aggregate (4×25 Gbit/s lanes)
Wire gauge: 26 AWG
Compliance: MSA-compliant QSFP28 breakout DAC electrical/mechanical profile
Typical applications: short-reach data center interconnects, breakout links
How to use
Confirm that the target devices support passive QSFP28-to-4xSFP28 breakout cables and that the intended ports are enabled for the corresponding protocol (100GBase-CR4 / 4x25GBASE-CR or InfiniBand). Power down or follow the manufacturer's hot-swap guidance for your hardware if required. Insert the QSFP28 plug into the source QSFP port and insert each SFP28 plug into the destination SFP ports until the latch engages. Verify link status and correct lane mapping in your switch or host firmware and configure interfaces as needed for the chosen protocol.
Usage recommendations
Use this 5 m passive DAC for short-distance, high-bandwidth links inside racks or between adjacent racks where passive twinax is supported; avoid using it for longer runs or in installs that require optical transceivers. Ensure firmware and hardware compatibility with QSFP28 breakout cables and test links after installation to confirm proper operation.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.25 kg |
| Package weight | 260 g |
| Cable length | 5 m |
| Product colour | Silver |
| Connector 1 | QSFP28 |
| Connector 2 | 4xSFP28 |
| Products per master (outer) case | 1 pc(s) |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand cable BlueOptics QSFP-4SFP25G-CU5M-BL cost, and is it available for purchase?

The price is 290.49 € (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 13.08.2026 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/5041229/64350915_large.webp