# Raptor Power 12S 4in1 ESC

> A 6S–12S four-in-one ESC for drones. Each motor has its own processor and gate driver, with current, voltage and temperature telemetry.

- Category: 6S–12S AM32 drone ESC
- Maker: London Defence R&D, Milton Keynes, United Kingdom
- Product group: [Flight electronics & platforms](https://londondrd.uk/products/flight-electronics)
- Product page: https://londondrd.uk/products/raptor-power-esc
- Enquiries: https://londondrd.uk/contact?product=raptor-power-esc

## Overview

The Raptor Power 12S 4in1 ESC drives four brushless motors from one board. It runs on 6S to 12S LiPo. Each motor has its own STM32G071 processor, its own DRV8300 gate driver and six 100 V MOSFETs. Motor control is sensorless, using back-EMF zero-crossing detection, and the firmware target is AM32.

It tells the flight controller what is happening on board. Current, voltage and temperature go out on one UART telemetry line, and there is an analog current output as well. It takes DShot150/300/600 and standard PWM inputs, depending on the firmware.

There is no hardware overcurrent cut-off: set the current limit in the flight controller or the ESC firmware. The board has no BEC. It needs two external low-ESR capacitors (470–1000 µF, 63 V) within 3 cm of the battery pads. For high continuous current, fit a heatsink on the MOSFET side and keep propeller airflow over the board.

Current ratings, weight and operating temperature are being measured on the prototype. We will publish them when testing is complete.

## Key characteristics

- Four ESCs on one 60 × 60 mm board, with 30.5 × 30.5 mm mounting
- One STM32G071 processor and one DRV8300 gate driver for each motor
- 6S–12S LiPo input, with a 58 V TVS diode on the input
- Sensorless back-EMF motor control, AM32-compatible firmware target
- Current, voltage and temperature telemetry on one UART line, plus an analog current output
- ESD protection on signal lines, driver UVLO, and firmware protection against low voltage, high temperature and motor stalls
- SWD programming port for each motor

## Specifications

| Specification | Value |
|---|---|
| Configuration | 4-in-1, sensorless BLDC, one STM32G071 MCU per motor |
| Input voltage | 6S–12S LiPo (18–50.4 V) |
| Absolute max input | 58 V (TVS standoff) |
| Motor control | Back-EMF zero-crossing detection, AM32-compatible target |
| Gate driver | DRV8300, 12 V GVDD, internal bootstrap |
| Power stage | 6 × 100 V MOSFETs per motor, 8 mΩ max per bridge path (2 FETs in series) at 25 °C |
| PWM switching frequency | 24–48 kHz |
| Input protocols | DShot150/300/600, standard PWM (firmware dependent) |
| Telemetry | Single-wire UART at 115200, AM32 format, plus analog current output |
| Current sensing | 12.5 mV/A, 0–250 A |
| Voltage sensing | 1:125 divider, ±1 % |
| Temperature sensing | On-board 10k NTC |
| On-board DC link | 26 × 10 µF / 100 V X7R MLCC |
| External capacitors | Required: 2 × 470–1000 µF 63 V low-ESR, within 3 cm of the pads |
| Overcurrent protection | No hardware cut-off; limit set in FC or firmware |
| BEC | None; 3.3 V auxiliary output, max 150 mA |
| Programming | SWD per motor |
| Signal connector | JST-SH 1.0 mm |
| Dimensions | 60 × 60 mm, 4-layer 2 oz PCB |
| Mounting | 30.5 × 30.5 mm, Ø3.2 mm (Ø4.0 mm with grommets) |
| Storage temperature | −40 to +85 °C |

Specifications may change. We confirm the exact figures against the current datasheet when you ask.

## Common questions

### Which firmware does it run?

The firmware target is AM32. It takes DShot150, DShot300, DShot600 and standard PWM, depending on the firmware build.

### Does it have a BEC?

No. There is a 3.3 V auxiliary output at up to 150 mA. Power the flight controller and receiver from another source.

### Do I need external capacitors?

Yes. Fit two 470–1000 µF, 63 V low-ESR capacitors within 3 cm of the battery pads.

### What are the current ratings?

We are measuring continuous, burst and peak current on the prototype. We will publish the figures when testing is complete.

### Is there hardware overcurrent protection?

No. Set the current limit in the flight controller or in the ESC firmware. The firmware protects against low voltage, high temperature and motor stalls.

### Where is it made, and where are the parts from?

It is designed and built in the United Kingdom. The processors are from STMicroelectronics and the gate drivers from Texas Instruments. All main parts are Western-made.

### Is it export controlled?

We class the Raptor Power 12S 4in1 ESC as a dual-use item outside the UK strategic export control lists. We still check the end user and destination for every order.

## Related products

- [Raptor Power 900 KV Motor](https://londondrd.uk/products/raptor-power-motor): A top-grade 900 KV brushless motor for interceptor drones and fast FPV platforms. It gives up to 4.15 kg of thrust across a wide 4S–12S range.
- [Raptor Pilot Pro FC](https://londondrd.uk/products/raptor-pilot-pro-fc): An ArduPilot flight controller with three IMUs from three makers, led by a tactical-grade ADIS16470, and direct power from a 5S–12S battery.
- [Baby Raptor Interception Drone](https://londondrd.uk/products/baby-raptor-interceptor): A small, fast interceptor drone. It finds, chases and stops hostile drones with very little operator input.

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London Defence R&D · https://londondrd.uk/products/raptor-power-esc · Content updated 2026-11-04