# InfiniBand/fibre optic cable BlueOptics Q28-4S28-DAC-1M-PS-BL 1m QSFP28 4xSFP28

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-1m-ps-bl--5038948
**Data updated:** 2026-03-07 15:11 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-1M-PS-BL
**EAN:** 4063232122434
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 134.49 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 111.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-1m-ps-bl--5038948

## 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 Q28-4S28-DAC-1M-PS-BL is a 1m 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 in data centers and networking environments, ensuring reliable connectivity and performance.

## Long description

The BlueOptics Q28-4S28-DAC-1M-PS-BL is a 1 meter direct attach cable (DAC) with a QSFP28 connector on one end and four SFP28 connectors on the other. Designed for short-range high-speed links in racks and between adjacent racks, this 100GBase-CR4 / 4x25GBASE-CR passive twinax copper cable follows MSA guidelines and supports Ethernet, FCoE, Fibre Channel and InfiniBand applications up to 100 Gbit/s over a 1 m distance. The cable is specified at 26 AWG and is intended for use with hardware platforms that support QSFP28 breakout to 4×SFP28 connections.
Advantages
The cable provides a low-latency, low-power passive connection for high-density data center environments, offering a cost-effective alternative to active modules for short-distance interconnects. Built to MSA compatibility, it is suitable for multi-vendor systems and is manufactured from industry-grade components to achieve stable performance and extended service life. Its QSFP28 to 4×SFP28 breakout design enables flexible connectivity between 100G ports and 4×25G ports without additional transceivers.
Suitable for
 Connecting QSFP28 ports to four SFP28 ports in rack and adjacent-rack deployments
 Short-range 100G/4×25G links in switches, routers and storage systems
 Ethernet, FCoE, Fibre Channel and InfiniBand applications at up to 100 Gbit/s
 High-density data center top-of-rack and spine-leaf cabling
Key specifications
 Length: 1 meter
 Connector types: QSFP28 (one end) to 4×SFP28 (other end)
 Data rates supported: up to 100 Gbit/s (100GBase-CR4 / 4×25GBASE-CR)
 Cable type: passive twinax copper (DAC)
 Wire gauge: 26 AWG
 Compliance: MSA QSFP28 breakout DAC electrical/mechanical compatibility
How to use
Insert the QSFP28 connector into a compatible QSFP28 port and plug each SFP28 connector into the corresponding 25G-capable SFP28 ports. Ensure that the connected devices support passive DACs and the specific breakout configuration (QSFP28 to 4×SFP28). No external power or configuration is required for the passive cable itself; device side settings such as link speed, lane mapping and firmware compatibility should be verified according to the hardware vendor instructions before deployment.
Usage recommendations
For reliable operation, use this 1 m passive DAC for short copper connections inside racks or between adjacent racks only. Verify vendor compatibility with QSFP28 breakout to SFP28 on both the switch and the target device, and confirm firmware or driver versions when deploying in multi-vendor environments. Avoid sharp bends and mechanical stress on connectors; follow standard data center cable management and ESD handling procedures.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.25 kg |
| Package weight | 260 g |
| Cable length | 1 m |
| Data transfer rate | 100 Gbit/s |
| Product colour | Black |
| Connector 1 | QSFP28 |
| Connector 2 | 4 x SFP28 |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand/fibre optic cable BlueOptics Q28-4S28-DAC-1M-PS-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 — 24 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/5038948/64339043_large.webp