Sub250 Redfox A3 F722 45A AIO Flight Controller for DollyFly25

The Sub250 Redfox A3 pairs an STM32F722 flight controller with a 45A BLHeli_32 ESC on a compact 25.5x25.5mm board, purpose-built for 2 to 3.5-inch drones such as the DollyFly25.

Key features

• ICM42688-P IMU and built-in barometer give the F722 MCU clean, low-noise flight data for tight PID tuning.
• 6 UART ports (including dedicated digital-VTX, SBUS and ESC-telemetry lines) leave plenty of room for GPS, buzzer and LED add-ons.
• Onboard DJI 6-pin connector plugs straight into a digital air unit without extra wiring.
• 45A continuous / 55A peak(10s) BLHeli_32 ESC runs on 2S to 6S LiPo, with Dshot300/600 and current-sensor telemetry.
• A removable Type-C adapter board can be relocated anywhere on the frame for quick parameter changes.

Specifications

• MCU: STM32F722
• IMU: ICM42688-P
• OSD: AT7456E
• UARTs: 6
• ESC Current: 45A continuous, 55A peak (10s)
• ESC Firmware: BLHeli_32
• Input Voltage: 2-6S LiPo
• BEC Output: 5V, 2.5A
• USB: SH1.0 5-pin to Type-C adapter board
• Betaflight Target: SUB250REDFOX722AIO
• Mounting: 25.5x25.5mm, M3
• Dimensions: 33.5 x 33.5 x 6.45 mm
• Weight: 8.7g

Ships with a DJI 6-pin cable, XT30 power lead, anti-vibration grommets and a 35V 470uF capacitor, so most 2 to 3.5-inch builds need nothing extra to wire in.