# Network Cable BlueOptics Q28-4S28-DAC-2M-PS-BL QSFP28 4 x SFP28 InfiniBand 2m Black

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-2m-ps-bl--10894282
**Data updated:** 2026-03-07 18:09 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-2M-PS-BL
**EAN:** 4063232122755
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 173.49 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 143.38 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-2m-ps-bl--10894282

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 28.07.2026 | free |
| Pickup points | 31.07.2026 | 1.89 EUR |
| Courier delivery to door | 31.07.2026 | 4.99 EUR |

## Summary description

The BlueOptics Q28-4S28-DAC-2M-PS-BL is a high-performance InfiniBand/fibre optic cable designed for efficient data transmission. It features a QSFP28 connector on one end and four SFP28 connectors on the other, allowing for versatile connectivity. With a length of 2 meters, this cable is ideal for short-distance connections in data centers. The male/male configuration ensures a secure connection, while the black color provides a sleek appearance. Perfect for high-speed networking applications.

## Long description

The BlueOptics Q28-4S28-DAC-2M-PS-BL is a 2 meter passive direct attach cable (DAC) with a QSFP28 connector on one end and four SFP28 connectors on the other, designed for short-distance high-speed connections in racks and between adjacent racks. This twinax copper breakout cable supports 100GBase-CR4 and 4x25GBASE-CR electrical transmission formats and is suitable for InfiniBand, Ethernet and Fibre Channel/FCoE environments when used with hardware that supports passive DACs. The cable is supplied in black and has a compact, male-to-male form factor for secure rack-mounted connections.
Advantages
The cable provides a cost-efficient, low-latency physical link for high-throughput server, switch and storage interconnects. As a passive twinax solution, it consumes minimal power and requires no active electronics, which reduces potential points of failure and simplifies compatibility with systems that support MSA-compliant QSFP28 breakout DACs. Constructed from quality components and meeting MSA electrical and mechanical definitions, it offers predictable performance for short-range links and an expected long service life when used within specified environments.
Suitable for
Short-range rack-to-rack and within-rack connections in data centers
100GBase-CR4 and 4x25GBASE-CR breakout links between QSFP28 ports and SFP28 ports
High-throughput server, switch and storage interconnects supporting InfiniBand, Ethernet or FCoE/Fibre Channel over DAC
Environments that require low-latency, low-power physical connectivity
Key specifications
Cable type: Passive twinax copper direct attach cable (DAC)
Connector A: QSFP28 (breakout end)
Connector B: 4 × SFP28 (individual breakout connectors)
Supported protocols: 100GBase-CR4; 4×25GBASE-CR; compatible with InfiniBand, Ethernet, FCoE/Fibre Channel when supported by host hardware
Length: 2 m
Wire gauge: 26 AWG
Colour: Black
Weight: approximately 0.25 kg
Compliance: MSA-compatible QSFP28 breakout DAC electrical and mechanical definitions
How to use
Install the BlueOptics QSFP28 to 4×SFP28 DAC by aligning and inserting the QSFP28 end into a compatible QSFP28 port and the four SFP28 ends into the corresponding SFP28 ports on the target devices. Ensure both devices officially support passive DAC breakout cables and the selected transmission mode (100GBase-CR4 or 4×25G). Handle the cable by the connectors and avoid sharp bends; maintain the minimum bend radius specified by the device vendors. After physical installation, verify link status through the host equipment management interface and check that the negotiated link speeds match the intended protocol.
Usage recommendations
Use this passive DAC for short, direct connections inside racks or between adjacent racks where 2 m reach is sufficient. Confirm compatibility with your switch, router or storage vendor for passive QSFP28 breakout cables and, if available, request a test sample to validate interoperability before deploying at scale.

## Specifications

| Feature | Value |
|---|---|
| Data transfer rate | 100 Gbit/s |
| InfiniBand protocol | Yes |

### Features

| Feature | Value |
|---|---|
| Cable length | 2 m |
| Connector 1 | QSFP28 |
| Connector 2 | 4 x SFP28 |
| Product colour | Black |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.25 kg |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 260 g |

## FAQ

### How much does the Network Cable BlueOptics Q28-4S28-DAC-2M-PS-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 — 56 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 28.07.2026 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: cable length, connector 1, connector 2, weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/10894282/64098940_large.webp