# DAC cable BlueOptics DAC-Q28-100G-50CM-BL 0.5m QSFP28 Male/Male

**URL:** https://aio.lv/en/product--blueoptics-dac-q28-100g-50cm-bl--4470672
**Data updated:** 2026-02-25 16:35 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** DAC-Q28-100G-50CM-BL
**EAN:** 4063232100609
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 105.49 €
**Prices and availability valid until:** 2026-07-30 23:59
**Price without VAT (21%):** 87.18 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-dac-q28-100g-50cm-bl--4470672

## 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 DAC-Q28-100G-50CM-BL is a 0.5m DAC cable featuring QSFP28 connectors on both ends. It is designed for high-speed data transmission in data centers and networking applications, providing reliable connectivity and reduced latency.

## Long description

The BlueOptics DAC-Q28-100G-50CM-BL is a 0.5 m direct attach cable (DAC) with QSFP28 male connectors on both ends, designed for short-reach, high-speed interconnects in data centers and server racks. This passive twinax copper cable supports 100GBase-CR4 electrical signaling over 0.5 meters and is suitable for linking switches, routers and storage hardware that accept QSFP28 100G DACs. The cable uses 30 AWG conductors and follows MSA-compliant QSFP28 form-factor specifications to ensure physical compatibility with standard 100G ports.
Advantages
The DAC-Q28-100G-50CM-BL provides low-latency, low-power connectivity for short-distance links, with passive design that removes the need for active transceivers and reduces power consumption. Manufactured to MSA guidelines and assembled from industry-standard components, the cable offers stable electrical performance for Ethernet, FCoE, Fibre Channel and InfiniBand applications at 100 Gbps on 0.5 m runs. Its compact 0.5 m length is optimized for in-rack and adjacent-rack connections, minimizing cable clutter and insertion loss compared with longer passive copper options.
Suitable for
In-rack connections between 100G QSFP28 ports (switch-to-switch, switch-to-server)
Adjacent-rack interconnects in network and compute cabinets
High-throughput fabric links for storage, Ethernet and FCoE deployments
Short-reach InfiniBand or proprietary 100G links where QSFP28 DACs are supported
Key specifications
Length: 0.5 meter (0.5 m)
Connector type: QSFP28 Male to QSFP28 Male
Data rate: up to 100 Gbps (100GBase-CR4 compatible)
Cable type: passive twinax copper (DAC)
Wire gauge: 30 AWG
Form factor compliance: QSFP28 / MSA-compatible
Typical applications: Ethernet, FCoE, Fibre Channel, InfiniBand
How to use
Insert each QSFP28 connector into the corresponding QSFP28 port on the devices to be connected, ensuring proper orientation and fully seated connectors. Verify that the host hardware and firmware support passive 100G DACs and the 100GBase-CR4 electrical interface. After physical installation, check link status on both devices and confirm negotiated speed and protocol. No additional power or external transceivers are required for passive operation, but equipment configuration may be needed to enable specific protocols or link aggregation.
Usage recommendations
Use this 0.5 m QSFP28 DAC for short-distance in-rack or adjacent-rack links where low latency and low power consumption are priorities. Confirm compatibility with your switch, router or storage platform and update device firmware if required. Avoid sharp bends and excessive strain on the cable; maintain recommended bend radius and secure routing to prevent mechanical stress. For deployments beyond short reaches, consider optical transceivers or active copper solutions.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.15 kg |
| Package weight | 160 g |
| Cable length | 0.5 m |
| Data transfer rate | 100 Gbit/s |
| Product colour | Black, Silver |
| Connector 1 | QSFP28 |
| Connector 2 | QSFP28 |
| InfiniBand protocol | Yes |

## FAQ

### How much does the DAC cable BlueOptics DAC-Q28-100G-50CM-BL cost, and is it available for purchase?

The price is 105.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 228 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

## Image

https://aio.lv/img/cache/product/4470672/64300511_large.webp