Holybro Tekko32 F4 4in1 50A (AM32)
Series: Holybro ESCs for drone motors
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
The Holybro Tekko32 F4 4in1 50A (AM32) is a 4-in-1 ESC for FPV quadcopters: four controllers share one board of 30.5 × 30.5 mm, together with an F4 microcontroller, a current sensor and AM32 firmware. The board weighs 13.8 g.
The continuous current of 50 A and the peak current of 60 A apply per channel, not as a total for the board; the board has to carry the sum through its traces, battery connection and heat removal. The voltage window runs from 4S to 6S, i.e. up to 25.2 V fully charged. The signal paths listed are DShot150, 300, 600 and 1200, MultiShot, OneShot, ProShot and PWM; the number after DShot is the bit rate in kbit/s. AM32 is open firmware and supplies motor speed via Bidirectional DShot for RPM filters. Telemetry is available. Earlier versions of the series ran BLHeli_32 according to retailers; the current one runs AM32.
Frame and law: quadcopters with 50 A per channel normally weigh more than 250 g and so lie outside class C0, which ends at 250 g. From that take-off mass, operator registration and a proof of competence are due. On 6S an ampere-hour of battery is 22.2 Wh.
For selection, a 4-in-1 controller is a compromise: it saves weight and wiring, but one burnt channel affects the whole board. After crashes check the solder pads at the battery and the motor connections; deformed capacitors and burn marks on the MOSFETs are clear warning signs.
Technical data
Other data
| Cell count (S) | 4-6Scorrect |
|---|---|
| Charging channels | 4correct |
| Continuous current (A) | 50 Acorrect |
| Integrated propulsion unit | nocorrect |
| Peak current (A) | 60 Acorrect |
| Protocol | DShot150/300/600/1200, MultiShot, OneShot, ProShot, PWMcorrect |
| Supported firmware | AM32correct |
| Telemetry | yescorrect |
| Weight (g) | 13.8correct |
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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