2026 Humanoid Robot Power Semi Select Guide: MOSFET Pract. HV Joints-MicroAct

The Evolution and Challenges of Power Semiconductors for Humanoid Robots in 2026

By 2026, humanoid robots are moving from laboratory prototypes to large-scale commercial use. With the accelerated deployment of products like the Tesla Optimus Gen-3 and Figure 02 in factories, logistics, and home services, OEMs are placing unprecedentedly stringent demands on the power density, dynamic response, and reliability of core modules such as joint actuators, power management, and energy recovery. As the key carriers of a robot's "muscles" and "nerves," the selection of power MOSFETs is no longer a simple matter of parameter matching. It requires coordinated thermal management, control algorithms, and safety redundancy at the system level to achieve high-frequency, high-torque output for humanoid movements and stable operation throughout its entire lifecycle.

Meanwhile, the application of wide-bandgap semiconductors (SiC, GaN) in ultra-high power joints is maturing, and intelligent power modules (IPMs) and highly integrated SGT devices are reshaping the design paradigm of low-voltage, high-density drivers. Based on the latest device technology advancements up to 2026 and the actual needs of the robotics industry, this article systematically outlines the MOSFET selection principles for various functional modules of humanoid robots, covering the complete power chain from high-voltage hip joint drives to micro-actuators in finger joints. Combining typical models and topologies, it provides engineers with a forward-looking and engineering-practical selection guide.

Humanoid robot systems are complex, and different functional modules have significantly different requirements for power devices, requiring precise selection based on specific scenarios.

I. Core Selection Principles

The selection of MOSFETs for humanoid robots should follow the following four-dimensional collaborative adaptation principles:

II. Module Selection Recommendations

1. Joint motor drive module (power core)

This is the most critical power component for humanoid robots, and it is divided into two categories based on joint power levels:

High-power joints (hip, knee, shoulder, etc., peak power > 10kW)

Selection criteria: Must support millisecond-level torque response, and be compatible with a high-speed gate driver IC (such as UCC5350), with a drive current ≥2A.

Small to medium power joints (elbow, wrist, ankle, etc., power 20W-150W)

2. Power Management and Distribution Module (Energy Hub)

3. Dynamic braking and energy recovery module 

4. Sensor and actuator drive module (nerve endings)

5. Power supply for communication and computing units

III. Key Considerations for System Integration Design


Thermal Management Strategies

High-Power Devices (VBP165R64SFD): Requires liquid cooling or a large heatsink, with real-time case temperature monitoring.

Medium-Power Devices (VBM1254N): PCB copper plating for heat dissipation + airflow design.

Miniature Packages (VBTA1220N): Relies on air convection.

Drive Circuit Design

High-Speed Drive: Joint drive requires a peak drive current of ≥2A to shorten switching time.

Protection Mechanisms: Gate series resistor (22Ω), TVS diode protection, hardware overcurrent protection (DESAT).

EMC Suppression: Parallel RC snubber circuit, power ground and signal ground single-point connection.

Reliability Assurance

Derating Design: Voltage and current maintain a margin of over 30%

Surge Protection: Varistors/TVS arrays are configured at the bus terminals

Predictive Maintenance: Temperature sensors are embedded in critical components to monitor thermal cycling

IV. Selection Quick Reference Table

V. Future Trends


For next-generation high-performance humanoid robots, the following should be considered:


SiC MOSFETs: Achieving higher switching frequencies and efficiency in >20kW super joints


Intelligent Power Modules (IPMs): High integration of drive, MOSFET, and protection functions


GaN Devices: Ultra-high frequency applications, further reducing the size of passive components


The above solutions cover the complete power chain from the high-voltage power core to the low-voltage nerve endings, and can be flexibly combined according to the specific robot's degree of freedom (e.g., 31 degrees of freedom), bus voltage (24V/48V/800V), and power level.