Available Options

• ● BLS 55A 30×30 4-in-1 ESC – high-current BLHeli_S ESC only
• ● F405 V4 + BLS 55A Stack – full stack with FC and ESC for plug-and-play use

Key Features – SpeedyBee BLS 55A ESC

• ● 55 A continuous current (70 A burst), BLHeli_S with soft-start
• ● 30×30 mm mounting with M3 hole support (up to 6 mm)
• ● Ideal for 5–7″ FPV drones, supports 4S–6S LiPo
• ● Thermal and short-circuit protection

Additional Features – Stack Version

• ● SpeedyBee F405 V4 FC with STM32F405 processor and 16 MB flash
• ● Built-in OSD, BMP280 barometer, and 5V/4A BEC
• ● Dual UART, SmartAudio, LED, buzzer ports
• ● Stackable layout with one cable between FC and ESC

Technical Specifications

• ● ESC: 55 A (70 A burst), 4S–6S input
• ● FC (stack only): STM32F405, barometer, OSD, 5V 4A BEC
• ● Mounting pattern: 30×30 mm (compatible with 20×20/25×25 via adapter)
• ● Weight: ESC ~16 g; Stack ~32 g

Applications

• ● 5–7″ freestyle or racing drones
• ● Custom FPV builds and drone upgrades
• ● Competition-level and commercial FPV projects

Note

Choose the ESC-only version if you already have a flight controller. The Stack option includes both ESC and F405 V4 FC – a ready-to-use flight system.