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Chapter 85 · HTS 8542.31

HTS 8542.31 – Microcontrollers & Microprocessors

HTS 8542.31 covers microprocessors, microcontrollers, and digital signal processors. The MFN (base) rate is free. Section 301 adds 50% for Chinese-origin MCUs. Section 122 adds 10% globally. STM32, PIC, and ARM Cortex-M parts all fall under this heading.

Duty Rates by Country of Origin

China
Section 301 (50%) + Section 122 (10%)
60%
Taiwan
Section 122 only
10%
Malaysia
Section 122 only
10%
Japan
Section 122 only
10%
Mexico
USMCA duty-free
0%

Common Part Numbers

STM32F103C8T6ATSAMD21G18PIC18F4550ESP32RP2040NRF52840

Key Manufacturers

STMicroelectronicsMicrochipNXPRenesasNordic SemiRaspberry Pi

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