SpeedyBee F405 V4 BLS Flight Controller / Stack with 55A ESC
Price range: £41.90 through £69.90 Inc. VAT
This is our best selling FC and flight stack. Given the awesome feature list and price, it’s not surprising!
NEW STACK Version – Now with 60A ESC – HERE
SpeedyBee F405 drone flight controller & stack – For the flight controller the V4 edition brings an updated the Gyro, it is now using the ICM-42688P. The BECs have also been uprated from 2A to 3A allowing for use of more power hungry HD systems. Other tweaks include native supports for DShot on all 8 motor outputs allowing for full DShot support in iNav. The most significant update is to the 4in1 ESC which brings more performance and improved reliability. It now boasts a rating of 55A and 70A burst, up from 50A and only a 55A burst. There’s also the addition a metal heatsink and the selection of MOSFETS with lower internal resistance. A built-in TVS diode for surge protection reduces voltage spikes. Furthermore, the ESC is built with a thicker copper layer in its PCB, a 50% increase from previous version, providing additional reliability and heat dissipation capability.
The Speedy Bee F405 50A Stack V4 includes all the features a user would expect from a modern flight controller and ESC stack, but at an incredible price. The flight controller features the STM32F405 MCU, onboard 4-level battery life indicator, Micro-SD card slot for Blackbox logging, connections for LED strip (available here), DJI plug for digital quads, and built-in Bluetooth for wireless configuration through the SpeedyBee App. Paired with the SpeedyBee BLS 55A 4-in-1 ESC, delivering up to 55A continuous current, these components ensure a powerful and reliable drone setup for your aerial adventures.
SPEEDYBEE F405 V4 FLIGHT CONTROLLER
- MCU: STM32F405
- IMU(Gyro): ICM42688P
- USB Port Type: Type-C
- Barometer: Built-in
- OSD Chip: AT7456E chip
- BLE Bluetooth: Supported for Flight Controller configuration (MSP enabled with Baud rate 115200 on UART4)
- WIFI: Not supported
- DJI Air Unit Connection Way: Two ways supported – 6-pin connector or direct soldering.
- 6-pin DJI Air Unit Plug: Supported and compatible with various DJI models, no wire changes needed.
- Blackbox MicroSD Card Slot: Compatible with Standard (SDSC) or High Capacity (SDHC) cards under 32GB.
- Current Sensor Input: Supported (for SpeedyBee BLS 55A ESC, set scale = 400 and Offset = 0).
- Power Input: 3S – 6S LiPo (Through G, BAT pins/pads).
- 5V Output: 9 groups of 5V output.
- 9V Output: 2 groups of 9V output.
- 3.3V Output: Supported up to 500mA current load.
- 4.5V Output: Supported up to 1A current load.
- ESC Signal: M1 – M4 on the bottom side, M5-M8 on the front side.
- UART: 6 sets (UART1, UART2, UART3, UART4 (Dedicated for Bluetooth connection), UART5 (Dedicated for ESC telemetry), UART6).
- ESC Telemetry: UART R5 (UART5).
- I2C: Supported for various sensors.
- Traditional Betaflight LED Pad: Supported for WS2812 LED controlled by Betaflight firmware.
- Buzzer: BZ+ and BZ- pad used for 5V Buzzer.
- BOOT Button: Supported for firmware flashing and LED control.
- RSSI Input: Supported (named as RS on the front side).
- Smart Port / F.Port: Not supported.
- Supported Flight Controller Firmware: BetaFlight (Default), INAV.
- Firmware Target Name: SPEEDYBEEF405V4.
- Mounting: 30.5 x 30.5mm (4mm hole diameter).
- Dimension: 41.6(L) x 39.4(W) x 7.8(H)mm.
- Weight: 10.5g.
SPEEDYBEE 55A BLHELI_S ESC
- Firmware: BLHeli_S J-H-40.
- Wireless Configuration: Full Configuration Supported in the SpeedyBee app.
- PC Configurator Download Link: Link.
- Continuous Current: 55A * 4.
- Burst Current: 70A (10 seconds).
- TVS Protective diode: Yes.
- External Capacitor: 1000uF Low ESR Capacitor (Included in the package).
- ESC Protocol: DSHOT300/600.
- Power Input: 3-6S LiPo.
- Power Output: VBAT.
- Current Sensor: Support (Scale=400 Offset=0).
- ESC Telemetry: Not supported.
- Mounting: 30.5 x 30.5mm (4mm hole diameter).
- Dimension: 45.6(L) * 44(W) * 8mm(H).
- Weight: 23.5g.
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SHIPPING & DELIVERY
We are based in the UK and ship to most destinations worldwide.
We dispatch orders during the times shown on our Dispatch Schedule. Orders placed before the daily dispatch cutoff will ship the same day (subject to stock availability). Orders placed after the cutoff will ship on the next scheduled dispatch day.
A confirmation email is sent once your order has been packed. If you need to amend your order, please contact us as soon as possible — once shipped, we’re unable to make changes.
We work with trusted delivery partners including Royal Mail, DHL, UPS, Fedex and Parcelforce. If you have a delivery requirement or would like to arrange collection, please get in touch.
Please fill in the fields below with the shipping destination details in order to calculate the shipping cost.
Shipping to the UK
- Order before the daily dispatch cutoff for same day dispatch.
- FREE delivery available on qualifying orders over £99 (under 1kg).
For small, low-value orders, Royal Mail First Class is our most economical option. Royal Mail Tracked 24 is the most popular choice, offering full tracking and flexible delivery options. For guaranteed next working day delivery, we recommend Royal Mail Special Delivery.
Royal Mail delivers to residential addresses Monday to Saturday, while courier services (including DHL) typically deliver Monday to Friday.
International Postage
- USA orders: Import duties and taxes are prepaid by us — no additional customs charges on delivery.
- Other destinations: Customs duties or import taxes may apply and are the responsibility of the recipient.
Smaller, lower-value orders may be sent via Airmail or tracked postal services. Economy road and express air courier options are available depending on destination. For faster delivery, we recommend express air courier services such as DHL Express, which typically deliver within 1–2 working days across Europe and a few working days for most other destinations.
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