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75A ESC 4-in-1 AT32F421K8U7

FPV Electronics > ESC (Electronic Speed Controllers)

$39.90
$49.90
High-performance 4-in-1 electronic speed controller utilizing the AT32F421K8U7 ARM Cortex-M4 MCU, designed for 5-8S FPV drones requiring ultra-fast response and robust power delivery.
SKU: CRP00880-75A
Package weight: 0.10 KG
Pkg. Size: 85MM*61MM*25MM
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75A 4-in-1 ESC (AT32F421K8U7) Technical Brief

Overview

High-performance 4-in-1 electronic speed controller utilizing the AT32F421K8U7 ARM Cortex-M4 MCU, designed for 3-8S FPV drones requiring ultra-fast response and robust power delivery.

1. Core Specifications

ParameterSpecification
MCUAT32F421K8U7 (120MHz Cortex-M4)
Continuous Current75A/channel (4-in-1 total 340A)
Instantaneous current90A/channel (10sec)
Input Voltage2S-8S (12.6-33.2V)
PWM Frequency8-48kHz (programmable)
ProtocolsDshot150/300/600/Multishot/Oneshot/PWM
Dimensions54×45×8mm
Board Weight16g

2. Key Features

Power Stage

  • • MOSFETs: 24 * LSGN04R013WE-5*6

  • • Capacitance: 30 * 22UF 35V ceramic capacitors + 1000UF electrolytic capacitor

  • • Power supply: 4 independent power supply LDO, four-way power isolation, ultra-stable operation

  • • Current Sensing: High-precision ammeter, using stable

  • • Base Firmware：AM32_  K _A_F421.hex

Control System

  • • MCU Performance:

    • • 120MHz clock speed

    • • Single-cycle 32-bit multiplication

    • • Hardware floating-point unit

  • • Update Rate: 32kHz signal processing

Protections

  • • Overcurrent (Hardware + Software)

  • • Over-temperature (85°C throttle reduction)

  • • Voltage spike protection (40V transient)

  • • Motor short-circuit detection

3. Accessories package 

  • • 1x 1000UF 35V 10*20mm electrolytic capacitor

  • • 1x XT60-male 12AWG silicone cable 15cm length

  • • 1x SH1.0-8pins silicone cable (7cm, reversed)

  • • 5x M3*8mm shock-absorbing balls

4.Connection Diagram

85A4IN1 ESC1.png85A4IN1 ESC2.png

 

Frequently Asked Questions

What VESC current rating do I need for my motor?
Choose by your motor’s phase-current demand and application. 200A–500A VESC controllers suit ebikes, scooters and light robotics; 1000A-class units power high-performance eskate, EUCs and small EVs; 2000A controllers target electric motorcycles and industrial drives. Always leave headroom above your battery’s fully-charged voltage.
Do you offer OEM/ODM customization for VESC controllers?
Yes. ChatRobotic is an ISO 9001 and ISO 14001 certified manufacturer providing OEM/ODM VESC controllers, custom firmware, enclosure design and PCB assembly for 200A–2000A applications. Contact our engineering team with your specs to start a custom build.
How long is the lead time and which shipping methods do you use?
In-stock VESC controllers are shipped via DHL/FedEx after payment is received. Delivery time depends on the shipping method: DHL/FedEx priority express 3–5 business days, economy express 4–6 business days, registered post 8–20 business days, worldwide. OEM/ODM and bulk orders are scheduled by customization scope. Logistics tracking is provided after shipment.
Are these VESC controllers compatible with sensored and sensorless motors?
Yes. ChatRobotic VESC controllers support both sensored (hall-sensor) and sensorless BLDC/PMSM motors and work with a wide battery range. FOC, regen braking, throttle curves and telemetry are fully configurable through VESC Tool.