• MUWEIDU K4020 12V brushless DC servo motor top view showing connector header and pinout markings
  • K4020 servo motor top panel close-up with DIP switch (1-2-3-R) and A/B/GND wiring pin labels
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MUWEIDU K4020 (25/40T) 12V Brushless DC Servo Motor, 18bit Encoder, RS485/CAN, 65g

MUWEIDU K4020 (25/40T) 12V Brushless DC Servo Motor, 18bit Encoder, RS485/CAN, 65g

MUWEIDU

$173.00 USD
$173.00 USD
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Version
Communication Mode
Turns
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Overview

MUWEIDU K4020 Motor is a K Series mid-to-high speed brushless DC servo motor with an integrated electric drive design (built-in driver and magnetic encoder). It supports speed/position control and provides RS485 or CAN communication for robotics and automation integrations.

Key Features

  • High-performance FOC servo motor
  • Integrated motor + driver design
  • Built-in magnetic encoder (spec: 18bit); encoder precision upgrade is referenced from 14-bit to 18-bit
  • Motor temperature monitoring: YES
  • Optimized motor cogging torque
  • PWM input supported
  • PC-based parameter tuning / testing / firmware upgrade available
  • Compatible with open-source development platforms including PC, MCU, PLC, industrial computer and Raspberry Pi

Applications

  • Humanoid robots
  • Robotic arms
  • Exoskeletons
  • Quadruped robots
  • AGV vehicles
  • ARU robots
  • Inspection robots
  • Handheld camera systems
  • LiDAR systems
  • Gimbal pods

Specifications

Model K4020 (25/40T)
Rated Voltage 12V
Rated Current 1.44A / 0.81A
Peak Power 14W / 4.6W
Rated Torque 0.07 N.m / 0.06 N.m
Peak Torque 0.25 N.m / 0.12 N.m
Rated Speed 1600 rpm / 700 rpm
Encoder 18bit
Rotor Inertia 56 gcm²
Motor Temperature Monitoring YES
Control Modes Speed/Position
Communication Protocol RS485 or CAN
Overall Dimensions Φ39.6 mm × 23 mm
Weight 65 g

Interface Definition

  • ID switch
  • CAN/RS485 connector
B/L RS485-B or CAN-L
A/H RS485-A or CAN-H
V- Negative power supply
V- Negative power supply
V+ Positive power supply
V+ Positive power supply
T UART transmitter
R UART receiver
G Signal GND

Manuals / Documents

For integration questions (RS485/CAN wiring, ID switch setup, or software configuration), contact support at support@rcdrone.top or visit https://rcdrone.top/.

Details

MUWEIDU K4020 12V brushless DC servo motor with integrated driver and 18-bit encoder, compact round housing

A compact K-series FOC servo motor designed for speed/position control in robotics and automation builds.

Exploded view of integrated motor, built-in driver board and magnetic encoder assembly for the K4020 servo motor

Integrated motor + driver construction helps simplify wiring while keeping the actuator lightweight.

K4020 servo motor interface pinout with ID switch and CAN/RS485 connector labeling for power and signal pins

Clear pin labeling for CAN/RS485, power, and UART lines makes bench setup and multi-node addressing easier.

PC-based tuning and testing software interface for servo parameter setup, control modes, and firmware upgrade supportApplication scenarios for the K4020 servo motor, including inspection robots, handheld cameras, LiDAR and gimbal pods

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