# DAC cable CBO QSFP28-DAC-3M passive copper 3 m for QSFP28 ports

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-3m-mt-bl--4466856
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-3M-MT-BL
**EAN:** 4063232101996
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 134.49 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 111.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp28-dac-3m-mt-bl--4466856

## 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

CBO QSFP28-DAC-3M is a 3-meter passive copper Direct Attach Cable (DAC) designed for QSFP28 ports. It provides a short-range, low-latency connection between compatible network devices, ideal for switch-to-switch or switch-to-server links in data centers. The fixed-length twinax assembly requires no optical transceivers and reduces power consumption and cost while maintaining high-speed 100Gbps connectivity.

## Long description

CBO QSFP28-DAC-3M is a 3-meter passive copper Direct Attach Cable (DAC) engineered for QSFP28 ports to provide cost-effective, short-reach 100Gbps links. The fixed-length twinax design eliminates the need for separate optical transceivers, offering a low-latency, low-power connection between compatible switches, servers and network appliances in data centre topologies. The cable is intended for direct rack-to-rack or within-rack interconnects where a reliable, high-bandwidth physical link is required.
Advantages
The passive copper construction delivers reduced power consumption compared with active or optical solutions while keeping signal integrity over the specified 3 m range. Because it is a pre-terminated twinax assembly designed for QSFP28 ports, installation is simple and requires no additional modules, which lowers capital and operating costs. The cable supports 100Gbps data rates with minimal latency and predictable electrical performance suitable for short-range interconnects.
Suitable for
Switch-to-switch connections within the same rack or adjacent racks
Switch-to-server links for high-throughput applications
Top-of-rack (ToR) and leaf-spine data centre architectures
Short-reach, high-bandwidth interconnects in campus or enterprise networks
Key specifications
Connector type: QSFP28 to QSFP28 passive twinax assembly
Length: 3 metres
Data rate: 100 Gbps
Cable type: Passive copper (twinax)
Latency: low, suitable for short-range, high-performance links
Power: passive design, reduced power consumption compared with optical transceivers
How to use
Verify that both endpoints have QSFP28 ports that support passive DAC connections and that the device firmware and port configurations are compatible with 100Gbps operation. Align each QSFP28 connector with the port and insert until the latch engages; no additional transceivers or external power are required. For hot-plug capable equipment, insert or remove the cable while the system is powered according to the host device guidelines. After installation, confirm link status and negotiated speed in the network device management interface.
Usage recommendations
Use this 3 m passive DAC for short-distance links inside racks or between adjacent racks to minimize latency and power usage. Avoid sharp bends and excessive pulling forces on the cable; maintain the manufacturer’s minimum bend radius and keep the cable clear of heat sources and moving parts. For environments where longer reach or optical isolation is required, consider appropriate active copper or optical transceiver solutions.

## FAQ

### How much does the CBO QSFP28-DAC-3M DAC cable 3 m 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 — 337 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/4466856/59854379_large.webp