SpeedyBee F405 V4 + BLS 55A 4-in-1 ESC Stack

SpeedyBee F405 V4 Flight Controller + BLS 55A 4-in-1 ESC Stack (30×30)

Power up your next FPV build with the SpeedyBee F405 V4 Flight Controller paired with the BLS 55A 4-in-1 ESC. This standard 30×30 stack delivers a locked-in flight feel, high current handling, and modern connectivity in a clean, easy-to-install package. Ideal for freestyle, racing, long-range, and cinematic quads running 3–6S LiPo.

The ESC runs BLHeli_S firmware with smooth DSHOT support and a true 55A continuous rating per motor (70A burst). The F405 V4 FC features a fast STM32F405 MCU, responsive ICM42688P gyro, built-in OSD and barometer, plus SpeedyBee Bluetooth for wireless Betaflight tuning right from your phone. DJI digital systems are fully supported via a 6-pin plug or direct soldering.

Key Features

• 55A 4-in-1 ESC power — 55A continuous per motor, 70A burst (10s).
• 3–6S LiPo ready — wide voltage support for modern FPV builds.
• BLHeli_S + DSHOT300/600 — smooth throttle response and reliable control.
• STM32F405 Flight Controller — fast processing for tight, stable flight.
• ICM42688P gyro — clean, responsive tracking.
• Bluetooth Betaflight setup — tune wirelessly using the SpeedyBee app (UART4 MSP enabled).
• Built-in OSD + barometer — crisp HUD overlays and altitude-aware features.
• DJI O3 / Vista / RunCam Link compatible — 6-pin plug or direct soldering supported.
• 30.5×30.5 mounting — standard stack size for most frames.

ESC Specifications (SpeedyBee BLS 55A 30×30 4-in-1)

• Firmware: BLHeli_S J-H-40
• Continuous Current: 55A × 4
• Burst Current: 70A (10 seconds)
• ESC Protocol: DSHOT300 / DSHOT600
• Power Input: 3–6S LiPo
• Power Output: VBAT
• Current Sensor: Supported (Scale 400 / Offset 0)
• TVS Protection: Yes
• External Capacitor: 1000µF Low-ESR (included)
• Mounting: 30.5 × 30.5mm (4mm hole diameter)
• Dimensions: 45.6(L) × 44(W) × 8(H) mm
• Weight: 23.5g

Flight Controller Specifications (SpeedyBee F405 V4 30×30)

• MCU: STM32F405
• IMU (Gyro): ICM42688P
• USB Port: Type-C
• OSD Chip: AT7456E
• Barometer: Built-in
• Bluetooth (BLE): Supported for wireless configuration
• Power Input: 3–6S LiPo via BAT/G pads
• 5V Output: 9 groups, up to 3A total
• 9V Output: 2 groups, up to 3A total
• 3.3V Output: Up to 500mA
• 4.5V Output: Up to 1A (receiver/GPS powered via USB)
• UARTs: 6 total (UART4 for Bluetooth, UART5 for ESC telemetry pads)
• I2C: Supported (SDA/SCL pads)
• Buzzer Pads: BZ+ / BZ-
• Firmware: Betaflight (default), iNav
• Target Name: SPEEDYBEEF405V4
• Mounting: 30.5 × 30.5mm (4mm hole diameter)
• Dimensions: 41.6(L) × 39.4(W) × 7.8(H) mm
• Weight: 10.5g

What’s Included

• 1 × SpeedyBee F405 V4 Flight Controller
• 1 × SpeedyBee BLS 55A 4-in-1 ESC
• 1 × 1000µF Low-ESR Capacitor
• [Add any extra hardware/cables your bundle includes]