NeutronRC Hold Mini 55A AM32 4-in-1 ESC (3–6S, 20x20/30.5x30.5)

The NeutronRC Hold Mini 55A is a compact 4-in-1 ESC running open-source AM32 firmware. Dual hole patterns let it mount in both 20x20 and 30.5x30.5 stacks, making it an easy fit for anything from compact freestyle builds to full-size 5" rigs.

Key features

• 4-in-1 layout — 55A continuous per motor, 65A peak.
• Open-source AM32 firmware (AT32F421 MCU): smooth sine-wave startup, telemetry, dynamic PWM tuning; DShot 150/300/600.
• 3S–6S LiPo input.
• Dual mounting: 20x20mm (M3) and 30.5x30.5mm (M4); 36x36x6mm board, ~6.5g.
• No BEC — designed to pair with an FC that supplies its own regulators.