Sub250 Redfox A3 45A AIO – MyFPV

Description

Redfox A3 45A AIO

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Bring uncompromising power and high-speed processing to your next 2-inch to 3.5-inch build with the Sub250 Redfox A3 45A AIO. Designed to perfectly fuse “lightweight” with “high performance,” this all-in-one board pairs a top-tier F722 processor with a robust 45A BLHeli_32 ESC, all packed into a remarkably light 8.7g footprint.

F722 Processing & Digital HD Ready

Say goodbye to CPU bottlenecks. The STM32F722 MCU delivers exceptional computing performance and real-time response, ensuring your quad flies exactly how you command it. Building a digital rig? The Redfox A3 features a dedicated DJI 6-Pin interface, allowing for a direct, plug-and-play connection to your DJI O3 or digital video transmission system without messy soldering.

Smart External USB-C Design

Tired of struggling to plug a USB cable into a buried flight controller? Sub250 solved this by including an independently designed Type-C adapter board. This remote USB dongle (with an integrated boot button) connects via a flexible cable, allowing you to mount your USB port anywhere on your frame for incredibly easy access during field tuning.

Robust 45A BLHeli_32 ESC

Push your micro motors to the absolute limit. The onboard ESC handles a massive 45A of continuous current (55A Burst) and supports 2S all the way up to 6S LiPo power. Utilizing authentic BLHeli_32 firmware, it supports up to 128kHz PWM frequencies, providing buttery-smooth motor control, high efficiency, and the reliability you need for aggressive freestyle or racing.

Key Features:

• Powerhouse Processor: STM32F722 MCU combined with the modern ICM42688-P gyro.

• Heavy-Duty ESC: 45A Continuous / 55A Burst on 2-6S power.

• Plug & Play Digital: Onboard 6-pin connector for DJI Air Units.

• Remote USB-C: Independent Type-C dongle makes accessing Betaflight effortless.

• Maximum Expansion: 6 UARTs and a robust 5V 2.5A BEC for all your peripherals.

• Universal Fit: Standard 25.5×25.5mm mounting pattern.

Specifications:

• MCU: STM32F722

• IMU (Gyro): ICM42688-P

• Continuous Current: 45A

• Burst Current: 55A (10s)

• Input Voltage: 2S – 6S LiPo

• ESC Firmware: BLHeli_32 (Supports Dshot300/600)

• OSD: Built-in AT7456E

• Barometer: Built-in

• UARTs: 6 Sets

• BEC Output: 5V 2.5A

• Mounting Pattern: 25.5mm x 25.5mm (M3 holes reduce to M2 with grommets)

• Dimensions: 33.5mm x 33.5mm x 6.45mm

• Weight: 8.7g

What’s in the Box?

• 1x Sub250 Redfox A3 45A AIO

• 1x External USB-C Port Module (150mm wire)

• 1x 6-Pin DJI Air Unit Connecting Cable

• 1x XT30 16AWG Power Cable (70mm)

• 1x 35V 470uf Capacitor

• 10x M2*6.5 Anti-Vibration Silicone Grommets (5x Black, 5x Red)

• 5x M2x10 Screws

• 8x M2 Nylon Nuts

• 1x Manual & Support Card