AM32 30A Electronic Speed Controller 2-6S 40V With Heat Sink for FPV Drones and Multi-Rotor Builds
The AM32 30A ESC is a compact, open-source electronic speed controller built for FPV drones and multi-rotor aircraft operating on 2S to 6S lithium battery packs. At its core is the AT32F421 main controller paired with an optimised power bus that connects directly to the MOSFET array, reducing copper loss and improving overall power delivery efficiency. This architecture makes it well-suited for builds where clean, responsive throttle response and thermal stability under continuous load are priorities. The included heat sink provides additional thermal management during high-current draw scenarios.
The controller runs the AM32 firmware, an actively maintained open-source platform that supports bidirectional DSHOT, variable PWM frequency, and in-field firmware updates via the motor signal line. With a 40V maximum voltage rating and a 28 x 41mm board footprint, it fits standard single-ESC mounting patterns without requiring chassis modifications. The 3-pin cable follows the AM32 convention with the centre wire unpopulated, as this ESC operates without a BEC - an external 5V supply is required to power the flight controller.
Key Features
- Firmware Platform: Runs AM32 open-source firmware, supporting bidirectional DSHOT and over-the-air updates via signal wire
- Current Rating: 30A continuous with burst headroom for throttle spikes
- Input Voltage: 2-6S LiPo/LiHV compatible, rated to 40V maximum
- Main Controller: AT32F421 MCU with optimised power bus for direct MOS connection, minimising copper loss
- No BEC: Centre wire of the 3-pin cable is unpopulated; requires a separate 5V BEC or flight controller power rail
- Thermal Management: Includes an aluminium heat sink for improved heat dissipation under sustained load
- Board Dimensions: 28 x 41mm (without wires), compatible with standard single-ESC mounting layouts
- Signal Protocol: Supports DSHOT, PWM, and bidirectional DSHOT for RPM telemetry
Applications
- FPV freestyle and racing quadcopters on 3S-6S power systems
- Long-range and cruiser builds require stable, low-loss power delivery
- 5-inch and larger multi-rotor platforms with high-current motor setups
- DIY drone builds where open-source firmware configurability is preferred
- Replacement ESC for existing 2-6S FPV builds needing a compact single-ESC solution
