HTS 8542.31
Microcontrollers (HTS 8542.31.0000) are experiencing significant supply chain disruptions in 2026, with STM32 lead times at 24–29 weeks. Most MCUs are manufactured in China, Malaysia, Thailand, or the Philippines — not at the semiconductor company's HQ country. China-origin MCUs face ~60% effective rate; all others face 10%.
| HTS Code | Description | Rate |
|---|---|---|
| 8542.31.0000 | Microcontrollers (MCUs) | 10% |
| 8542.31.0000 | STM32 series (STMicro) | 10% |
| 8542.31.0000 | PIC/dsPIC (Microchip) | 10% |
| 8542.31.0000 | Kinetis/i.MX (NXP) | 10% |
| 8542.31.0000 | RL78/RX/RA (Renesas) | 10% |
Rates shown for non-China origin. China adds Section 301 surcharges (7.5%–50% depending on HTS code) for most electronics.
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