SpeedyBee F405 V4 BLS 55A 30*30 FC&ESC Stack from SpeedyBee is a comprehensive solution for FPV enthusiasts and professionals, combining a high-quality flight controller and a powerful 4-in-1 ESC. The set is designed to enhance the reliability and maneuverability of a quadcopter, ensuring stable operation with 3S to 6S batteries.

Features:

• Compact Design: 30.5 x 30.5 mm mounting pattern (4 mm hole diameter) allows for stack installation on various frames.
• Precise Control: The controller is equipped with an STM32F405 MCU and a high-precision ICM42688P IMU gyroscope.
• Integrated SpeedyBee BLS 55A 4-in-1 ESC: Each channel has a continuous current of up to 55A and a peak of 70A (10 sec).
• Bluetooth Configuration: Convenient wireless setup via the SpeedyBee app (MSP on UART4, Baud rate 115200).
• LiPo Battery Compatibility: Supports voltage from 3S to 6S (for FC and ESC).

Specifications:

SpeedyBee F405 V4 FC Flight Controller:

• MCU: STM32F405
• IMU (Gyroscope): ICM42688P
• USB Port: Type-C
• Barometer: Built-in
• OSD Chip: AT7456E
• Bluetooth: Supported for Flight Controller configuration (MSP enabled with Baud rate 115200 on UART4)
• DJI Air Unit Connection: Compatible with DJI O3, RunCam Link, Caddx Vista, and DJI Air Unit V1 without wire swapping
• Blackbox MicroSD: Supports cards up to 32 GB (SDSC and SDHC, FAT16 or FAT32 format)
• Current Input Sensor: Supported (for SpeedyBee BLS 55A ESC set Scale = 400 and Offset = 0)
• Input Power: 3S – 6S LiPo
• 5V Output: 9 groups of 5V output
• 9V Output: 2 groups of 9V output
• 3.3V Output: Supports current load up to 500 mA
• 4.5V Output: Supports current load up to 1 A
• ESC Outputs: M1 – M4 on the bottom side and M5 – M8 on the top side of the board
• UART: 6 groups (UART1, UART2, UART3, UART4 (for Bluetooth), UART5 (for ESC telemetry), UART6)
• I2C: Supported
• Buzzer: Yes
• BOOT Button: Yes
• RSSI Input: Yes
• Firmware Support: BetaFlight (default), INAV
• Programming Target: SPEEDYBEEF405V4
• Mounting Pattern: 30.5 x 30.5 mm (4 mm hole diameter)
• Dimensions: 41.6 x 39.4 x 7.8 mm
• Weight: 10.5 g

SpeedyBee BLS 55A 4-in-1 ESC Speed Controller:

• Firmware: BLHeli_S J-H-40
• Wireless Configuration: SpeedyBee app support
• PC Configurator Link: ESC Configurator
• Continuous Current: 55A x 4
• Peak Current: 70A (10 sec)
• TVS Protection: Yes
• External Capacitor: 1000µF Low ESR (included)
• ESC Protocol: DSHOT300/600
• Input Power: 3-6S LiPo
• Output Power: VBAT
• Current Sensor: Yes (Scale=400 Offset=0)
• Mounting Size: 30.5 x 30.5 mm (4 mm hole diameter)
• Dimensions: 45.6 x 44 x 8 mm
• Weight: 23.5 g

Package Contents:

SpeedyBee F405 V4:

• 5x M3*8 mm silicone grommets (for FC)
• 1x SH 1.0mm 30mm 8pin cable (for FC-ESC connection)
• 1x 6-pin DJI cable (80 mm)

SpeedyBee BLS 55A 4-in-1 ESC:

• 1x 35V 1000uF Low ESR capacitor
• 5x M3 silicone O-rings
• 1x XT60 power cable (70 mm)
• 1x SH 1.0mm 30mm 8pin cable (for FC-ESC connection)
• 5x M3*8.1 mm silicone grommets (for ESC)

This stack is ideal for upgrading your quadcopter: it combines high current output ESC, flexible power outputs, a powerful STM32F405 controller with a modern IMU, and convenient connection options, including DJI Air Unit support. The SpeedyBee F405 V4 BLS 55A 30×30 FC&ESC Stack ensures stability, protection, and easy setup — from Bluetooth configuration to Blackbox MicroSD compatibility and telemetry.

Other technical details and setup recommendations can be found in the official manufacturer's documentation and in the SpeedyBee/ESC Configurator tools. The set is recommended for projects requiring compact 30.5×30.5 mm mounting dimensions and high ESC current endurance.

Other products in this category can be found here Stacks (FC+ESC)