HS Code for Microprocessors and MCUs
The HS Code for microprocessors and mcus is 854231. The MFN duty rate for importing to the US is Free.
| HS Code (6-digit) | 854231 |
|---|---|
| US Duty Rate (MFN) | Free |
| EU Duty Rate (MFN) | 0% |
| Chapter | 85 |
| Heading | 8542 |
| Last Updated | 2026-05 |
Description
Processors and controllers
HS Code 854231 covers monolithic digital integrated circuits, including microprocessors and microcontrollers, which enter the United States duty-free.
Frequently Asked Questions
Do imports of microprocessors under HTS 854231 require an import license or specific regulatory approval from US government agencies?
Yes, certain high-performance microprocessors, particularly those designed for telecommunications, military, or supercomputing applications, may require an export license from the Bureau of Industry and Security (BIS) for re-export controls or be subject to review by the Committee on Foreign Investment in the United States (CFIUS) for national security. Importers must verify the technical specifications and end-use against the Commerce Control List (CCL) categories 3A001, 4A001, or 5A002. Failure to obtain necessary authorizations can result in seizure, penalties, or denial of entry.
What are the critical packaging and handling requirements for shipping microprocessors and MCUs (HTS 8542.31) to prevent damage and customs delays?
Microprocessors are highly sensitive to electrostatic discharge (ESD) and physical shock, so they must be shipped in sealed, static-shielding bags placed within rigid, anti-static foam inserts inside the outer box. The commercial invoice must clearly state the item as 'Integrated Circuits: Microprocessors' with their ESD-sensitive nature noted. Inadequate packaging can lead to product damage claims and may trigger customs inspections for suspected counterfeit goods due to improper handling.
Common Classification Mistakes for Microprocessors
A frequent error is classifying monolithic integrated circuits (ICs) lacking a central processing unit (CPU) under this heading; they typically belong in 8542.39. Digital signal processors (DSPs) and graphics processing units (GPUs), even if called "processors," are generally not microprocessors and are classified elsewhere, such as in 8542.31 or 8542.32. Also, entire computer motherboards or systems-on-a-chip (SoCs) that integrate a microprocessor with other functions (memory, I/O) should not be classified here, but under headings for those composite goods (e.g., 8471.30 or 8542.31).
Related HS Codes
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