AIO FC Sub250 Redfox F722 A3 45A

The Sub250 Redfox A3 F722 45A AIO Flight Controller is a high-performance, ultra-lightweight solution designed for 2–3.5-inch FPV drones. Powered by the STM32F722 MCU and paired with a BLHeli_32 45A ESC, it delivers exceptional flight control, fast response, and reliable power handling. With an independent Type-C adapter, onboard DJI 6-pin interface, and multiple UART ports, it offers maximum flexibility for digital and analog builds. Engineered for racers and freestyle pilots, the Redfox A3 combines “lightweight” and “high performance” to push the limits of micro FPV drone performance.

Features:
- STM32F722 MCU, powerful computing performance with high-speed and real-time response.
- Reliable and durable BLHeli_32 45A ESC supports up to 128khz PWM frequency.
- Independently designed DJI 6PIN interface, directly connected to DJI digital video transmission system.
- TypeC adapter board with boot button, SH1.0 5PIN direct plug, meeting the placement needs of various kinds of small frames.
- 4 sets of complete UART ports provide more possibilities for installation and expansion, and the optimized pad design makes welding easier.
- Supports functions such as OSD parameter adjustment, GPS, LED, buzzer, etc.
- Ultra-light weight of 8.7g, 25.5x25.5mm M3 mounting holes, suitable for most frames on the market.

FC Specification：
MCU: STM32F722
IMU: ICM42688-P
Firmware Target Name: SUB250REDFOX722AIO
OSD Chip: AT7456E
Barometer: Built-in
UART: 6 sets (UART1, UART2, UART3 for Digital VTX SBUS receiver, UART4, UART5 for ESC telemetry, UART6)
External Buzzer: Supported
External LED: Supported
6-Pin DJI Air Unit Plug: Supported
USB Port Type: SH1.0 5PIN to Type-C

ESC Specification:
Continuous Current: 45A
Burst Current: 55A(10s)
Power Input: 2~6S (LiPo Battery)
ESC Protocol: Dshot300, Dshot600
Current Sensor: Supported
ESC Firmware: BLHeli_32
BEC Output: 5V 2.5A
Mounting: 25.5x25.5mm, φ3mm hole reduces to φ2mm with Anti-vibration Silicone Grommet
Dimension: 33.5x33.5x6.45mm,1.6mm Board Thickness
Weight: 8.7g

Package includes:
1x Redfox A3 35A/45A AIO
1x External USB-C Port Module (Wire Length:150mm)
1x 6-Pin DJI Air Unit Connecting Cable
5x M2x6.5 Black Anti-vibration Silicone Grommets (4 x Pre-installed）
5x M2x6.5 Red Anti-vibration Silicone Grommets
5x M2x10 Screws
8x M2 Nylon Nuts
1x 35V 470uf Capacitor
1x XT30 16AWG 70mm Power Cable