Introducing the Redfox A3 series flight controller, a new choice in lightweight FPV drones brought to you by the Sub250 team.
Designed specifically for 2 to 3.5-inch drones, it integrates the powerful computational capabilities of the F722 MCU to ensure exceptional flight performance.
Featuring an independently designed Type-C adapter board, it can be conveniently placed at any location on the frame for quick parameter adjustments.
Onboard DJI 6-Pin interface, offering direct connectivity to digital video transmission systems.
Equipped with four sets of UART ports, providing more possibilities for installation and upgrades. It also comes with a 5V@2.5A BEC to meet the increasing demand for additional peripherals.
Sub250 is committed to combining “lightweight” and “high performance” to bring a brand new experience to the racing drone field. The Redfox A3 series flight controller helps you explore the perfect fusion of lightweight design and exceptional performance.

Check out all our Whoop Style AIO Flight Controllers and the rest of our Sub250 Products!

Features:

STM32F722 MCU, powerful computing performance with high-speed and real-time response.
Reliable and durable BLHeli_32 35A/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.
5V@2.5A BEC meets the demands of more peripheral devices.
Supports functions such as OSD parameter adjustment, GPS, LED, buzzer, etc.
Ultra-light weight of 8.7g, 25.5mmx25.5mm M3 mounting holes, suitable for most frames on the market.

FC Specifications:

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
BEC Output: 5V 2.5A
Mounting: 25.5mm x 25.5mm, φ3mm hole reduces to φ2mm with Anti-vibration Silicone Grommet
Dimension: 33.5mm(L) x 33.5mm(W) x 6.45mm(H) ,1.6mm Board Thickness
Weight：8.7g

ESC Specifications:

Continuous Current: 35A/45A
Burst Current: 45(10s)/55A(10s)
Power Input: 2~6S (LiPo Battery)
ESC Protocol: Dshot300, Dshot600
Current Sensor: Supported
ESC Firmware: BLHeli_32

Download the Installation Manual Here

Package Includes:

1 x Redfox A3 35A/45A AIO
1 x External USB-C Port Module (Wire Length:150mm)
1 x 6Pin DJI Air Unit Connecting Cable
5 x M2*6.5 Black Anti-vibration Silicone Grommets（4 x Pre-installed）
5 x M2*6.5 Red Anti-vibration Silicone Grommets
5 x M2x10 Screws
8 x M2 Nylon Nuts
1 x 35V 470uf Capacitor
1 x XT30 16AWG 70mm Power Cable
1 x Manual & Support Card

Sub250 Redfox A3 F722 35A/45A 4in1 AIO Flight Controller for 2 to 3.5 inch Drones - Choose Version