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Ubiquiti UACC-DAC-QSFP28-0.5M UniFi 100G Direct Attach Cable QSFP28 to QSFP28 0.5m Copper Black

Brand:
Ubiquiti
Ubiquiti UACC-DAC-QSFP28-0.5M 0.5 m QSFP28 100GBase Cable
Ubiquiti UACC-DAC-QSFP28-0.5M UniFi 100G Direct Attach Cable QSFP28 to QSFP28 0.5m Copper Black
€60 inc. VAT
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UACC-DAC-QSFP28-0.5M
€50.42
€60.00 inc. VAT
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Product Code
04:518645
EAN Code
0810084690031
Manufacturer
Ubiquiti
Quick Specs
Type
QSFP28 passive DAC
Speed
100 / 40 Gbps
Length
0.5 m · copper · black
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UniFi 100G Direct Attach Cable — QSFP28, 0.5 m

UACC-DAC-QSFP28-0.5M100 / 40 GbpsQSFP28 to QSFP28Passive copper · black

The Ubiquiti UniFi 100G Direct Attach Cable in 0.5 m (part number UACC-DAC-QSFP28-0.5M) is a passive QSFP28-to-QSFP28 copper cable carrying up to 100 Gbps between directly stacked aggregation switches, enterprise gateways and NVR-class hardware. It also runs at 40 Gbps with QSFP+-rate ports, needs no transceivers, and adds no power draw or heat. Typically in stock with fast delivery across Cyprus.

Compatibility note: Connects QSFP28 (100G) or 40G-rate ports; it does not split into 4×25G breakouts. The 7.0 mm jacket has a minimum 37 mm bend radius — at 0.5 m it suits directly adjacent devices only; use the 1 m or 3 m versions for longer in-rack runs.

Key Features

 
100G without transceivers
Integrated QSFP28 ends plug straight into both cages — the cheapest and lowest-latency way to move 100 Gbps between stacked UniFi devices.
 
Backwards compatible 40G
Auto-negotiates 40 Gbps when connecting older QSFP-rate ports, protecting the investment during staged upgrades.
 
Passive and cool
Zero power consumption and no optics to fail; black PVC jacket with 37 mm bend radius keeps the half-metre link tight and tidy.

Technical Specifications

Identification
Part Number UACC-DAC-QSFP28-0.5M
EAN / GTIN 0810084690031
MPN UACC-DAC-QSFP28-0.5M
Cable
Connectors QSFP28 to QSFP28
Data rate 100 / 40 Gbps
Length 0.5 m
Wire Copper (passive DAC)
Jacket Black PVC, 7.0 mm OD
Bend radius Min. 37 mm
Environment
Operating temperature 0 to 70°C
Family lengths 0.5 / 1 / 3 m · 10-pack option for 0.5/1 m

Frequently Asked Questions

Does the UACC-DAC-QSFP28-0.5M work at 40 Gbps?
Yes — it supports 100 Gbps on QSFP28 ports and falls back to 40 Gbps when either end runs at QSFP+ rate.
Can I use it as a 4x25G breakout?
No. This is a straight QSFP28-to-QSFP28 cable; breakout applications need a dedicated breakout DAC or fiber solution.
What is the difference from the SFP28 DAC?
SFP28 DACs carry 25 Gbps on SFP28 ports; this QSFP28 cable carries four lanes for 100 Gbps on QSFP28 ports. Match the cable to the port type.
What do I need to know before buying?
Confirm both ports are QSFP28/QSFP and directly adjacent — 0.5 m spans neighbouring rack units only.
Singular Expert Insight
The 0.5 m QSFP28 DAC is the natural link between two aggregation switches stacked back-to-back — shorter is tidier and there is no signal penalty with passive copper. For anything beyond 3 m move to QSFP28 optics and fiber. See QSFP28-equipped models in our network switches range.

Buyer’s Guide

Buy it if
you are linking adjacent QSFP28 ports and want maximum throughput with zero configuration and zero power draw.
Skip it if
the ports are SFP28/SFP+ (use 25G/10G DACs) or further apart (use the 1/3 m versions or fiber).
Also consider
the 1 m or 3 m versions of this cable, or the UACC-Uplink-SFP28 series for 25G ports.

Features - Ubiquiti - UACC-DAC-QSFP28-0.5M

Colour
black
Length
0.5m
More Details
Product Code
04:518645
EAN Code
0810084690031
Manufacturer
Ubiquiti
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