KDE Direct UAS55HVC 55A+HV
Series: KDE Direct ESCs for drone motors
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The KDE Direct KDE-UAS55HVC (55A+HV) is a high-voltage single-motor ESC from the US maker KDE Direct for mid-class multicopters on 3S to 12S. It drives one motor, is optically isolated and has protection rating IP56. The board measures 35 × 72 mm (width × length, without height).
The continuous current is 55 A for 180 s at a minimum airflow of 8 km/h, the peak current 95 A for 5 s. The airflow is part of the test condition: in a calm hover cooling is weaker, so the continuous current should be set more cautiously there. The weight of 64 g is without leads, with leads it is 96 g. The throttle signal arrives by PWM. Optical isolation means an optocoupler carries the signal between flight controller and ESC without a common ground connection; ground loops and noise from the power side reach the flight controller less easily. IP56 means protection against dust and against powerful water jets.
Frame and law: depending on take-off mass, a multicopter with this controller falls into EU class C2 or C3; the duties, for example Remote ID for C1 to C3, concern the aircraft. On 12S an ampere-hour of battery is 44.4 Wh, on 3S only 11.1 Wh.
For selection: the speed limit of 360,000 rpm applies to a 2-pole motor and drops accordingly with more poles. Check the seals and housing (IP56), lead roots and solder joints; heat damage shows as discoloured components.
Technical data
Other data
| Cell count (S) | 3-12Scorrect |
|---|---|
| Charging channels | 1correct |
| Continuous current (A) | 55 Acorrect |
| Dimensions (mm) | 35x72correct |
| Integrated propulsion unit | nocorrect |
| Peak current (A) | 95 Acorrect |
| Protocol | PWMcorrect |
| Weight (g) | 64correct |
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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