Skystars F405 Mini HD2 KM35 35A 3-6S Stack

The Skystars F405 Mini HD2 KM35 Stack pairs an STM32F405 flight controller with a 35A BLHeli_S 4-in-1 ESC. Built for 3-inch cinewhoops, 4-inch explorers, and lightweight 5-inch frames, this stack is natively equipped for digital video. It features a plug-and-play port and a dedicated 10V BEC, delivering direct power and signal to a DJI O3, Caddx Vista, or Walksnail Avatar VTX without manual soldering.

Key features

• Dedicated plug-and-play port for direct connection to digital HD video transmitters
• Dual BECs (5V and 10V) to isolate VTX loads from the flight controller and receiver
• Six full hardware UARTs for flexible peripheral routing (GPS, receiver, and telemetry)
• 35A continuous (45A burst) ESC capacity easily handles high-KV 6S throttle demands
• Factory BLHeli_S firmware supports Bluejay flashing for bidirectional DShot and RPM filtering

Specifications

• Flight Controller MCU: STM32F405
• Gyro: ICM42688 or BMI270, depending on batch
• Barometer: Onboard
• ESC Continuous Current: 35A (45A Burst)
• Input Voltage: 3-6S
• ESC Firmware: BLHeli_S
• BEC: 5V/2A, 10V/2A
• UARTs: 6
• Blackbox: 16MB Flash
• Mounting: 20x20 (M2 or M3 with the supplied grommets)
• Firmware: Betaflight, INAV
• Weight: FC 4.8 g, ESC 7.8 g
• ESC size: 31 x 36 x 3.9 mm

The 20x20 mounting footprint ensures tight integration in modern sub-250g frames, while the 3-6S input range accommodates both lightweight 4S cruisers and aggressive 6S freestyle builds.