Product overview
The BrotherHobby Returner 3-6S F405 V3 Betaflight Flight controller is a flight-control board built around an STM32F405RET6 CPU, with an ICM-42688 IMU, AT7456E OSD and SPL06-001 barometer. Its 38.5 × 38.5 mm footprint uses a 30.5 × 30.5 mm mounting pattern with 4 mm holes, and the board weighs 7.82 g. Integration must accommodate its 3S–6S input range. Its BEC outputs are rated at 5V/2A and 10V/2A, while black-box support has a stated capacity of 16M.
The controller provides M1–M8 ESC outputs and lists UART1 through UART6 for telemetry, with UART5 assigned to ESC telemetry. DJI equipment can connect by direct plug-in connection or soldering. Other integration provisions include a Type-C USB port, IIC support and a CUR current-sensing pad. Receiver support covers SBUS, IBUS, DSM2/X, TBS and CRSF. External LED, buzzer and RSSI support are also listed. The specified firmware target is betaflight_4.5.0 BROTHERHOBBYF405 V3, defining the firmware configuration associated with this board.
Specifications
| Specification | Value & conditions |
|---|---|
| Product | BrotherHobby Returner 3-6S F405 V3 Betaflight Flight controller |
| CPU | STM32F405RET6 |
| Input power | 3S-6S |
| Dimensions and mounting | 38.5 × 38.5 mm; 30.5 × 30.5 mm mounting pattern; hole diameter 4 mm |
| IMU | ICM-42688 |
| OSD | AT7456E |
| Barometer | SPL06-001 |
| Black box | Supported; capacity 16M |
| BEC outputs | 5V/2A and 10V/2A |
| DJI connection | Supports direct plug-in connection and soldering |
| IIC | Supported |
| Telemetry | UART1, UART2, UART3, UART4, UART5 and UART6; UART5 is ESC telemetryUART5 is assigned to ESC telemetry. |
| USB port | Type-C |
| Current-sensing port | CUR pad |
| ESC outputs | M1–M8 |
| LED support | Supports external LEDExternal LED. |
| Target firmware | Betaflight_4.5.0 BROTHERHOBBYF405 V3 |
| Receiver support | SBUS, IBUS, DSM2/X, TBS and CRSF |
| Buzzer support | Yes |
| RSSI support | Yes |
| Weight | 7.82 g |
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