# InfiniBand/fibre optic cable BlueOptics Q28-4S28-DAC-3M-PS-BL 3m QSFP28 4x SFP28 Male/Male

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-ps-bl--4466089
**Data updated:** 2026-02-25 16:31 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-3M-PS-BL
**EAN:** 4063232123127
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 159.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-3m-ps-bl--4466089

## 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 Q28-4S28-DAC-3M-PS-BL is a 3-meter 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, making it a versatile choice for your networking needs.

## Long description

The BlueOptics Q28-4S28-DAC-3M-PS-BL is a 3 m direct attach cable with a QSFP28 plug on one end and four SFP28 plugs on the other. Designed for short-range electrical connectivity in rack and adjacent-rack installations, this 26 AWG twinax cable supports aggregated 100GBase-CR4 or 4x25GBASE-CR links and is intended for use with equipment that accepts QSFP28-to-4xSFP28 breakout connections. The cable is suitable for high-speed Ethernet, Fibre Channel, FCoE and InfiniBand applications where a passive DAC solution is appropriate.
Advantages
This passive QSFP28 to 4xSFP28 direct attach cable provides low latency and low power consumption for short-distance connections. It is manufactured to MSA-compliant electrical and mechanical specifications and uses high-quality components to offer consistent signal integrity and long service life. The passive design reduces failure points by avoiding active electronics in the cable and simplifies installation in dense rack environments.
Suitable for
Interconnecting switches and routers within the same rack or adjacent racks
Connecting storage systems to top-of-rack switches supporting 100G breakout
Short-reach InfiniBand or Ethernet links where passive DACs are supported
High-density server and blade deployments requiring breakout connectivity
Key specifications
Length: 3 meters
Connector A: QSFP28 male
Connector B: 4 × SFP28 male (breakout)
Cable type: Passive twinax copper (DAC), 26 AWG
Supported protocols: 100GBase-CR4, 4×25GBASE-CR, Ethernet, FCoE, Fibre Channel, InfiniBand
Power consumption: passive (typical very low power draw)
Compliance: MSA QSFP28 breakout compatibility; meets common industrial directives (CE/RoHS/FCC where applicable)
How to use
Ensure both devices support passive QSFP28-to-4xSFP28 breakout cables and the intended transmission protocol. Insert the QSFP28 end into the QSFP28 port and the SFP28 ends into the corresponding SFP28 ports on the destination device. Verify link negotiation and speed settings on both ends via the management interface of the switches or servers. Avoid excessive bending near the connectors and route the cable to prevent mechanical strain during rack movement or equipment servicing.
Usage recommendations
Use this 3 m DAC for short interconnects inside racks or between adjacent racks; confirm vendor support for passive DACs in your hardware and, if needed, request a test sample to validate compatibility before large-scale deployment.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.25 kg |
| Package weight | 260 g |
| Cable length | 3 m |
| Data transfer rate | 100 Gbit/s |
| Product colour | Black |
| Connector 1 | QSFP28 |
| Connector 2 | 4 x SFP28 |

## FAQ

### How much does the InfiniBand/fibre optic cable BlueOptics Q28-4S28-DAC-3M-PS-BL cost, and is it available for purchase?

The price is 192.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 19 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/4466089/58966855_large.webp