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North American Industry Classification System
U.S. imports of printed circuit assemblies (electronic assemblies) (NAICS 334418) totaled $19.4B in July 2026, traded with 95 countries.
Importers of Printed Circuit Assemblies (Electronic Assemblies) paid $52.1M in duties in July 2026 — an effective duty rate of 18% on $290.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Printed Circuit Assemblies (Electronic Assemblies) imports of $19.4B in July 2026 ran 57% above the year-to-date monthly average of $12.4B.
Last updated: July 2026 dataPrinted circuit assemblies (PCAs) — bare boards populated with active and passive components through surface-mount or through-hole processes — are classified under NAICS 334418 and represent a higher-value, more complex import category than bare PCBs. Section 301 tariffs on Chinese-origin assemblies have driven significant supply-chain restructuring toward contract manufacturers in Mexico, Vietnam, and Malaysia. The functional identity of the assembly (e.g., a motor control board vs. a telecommunications line card) governs HTS classification, and assemblies designed for specific end-use applications may be subject to additional regulatory review depending on the finished product they are destined for.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
31.0K shipments/mo
When a PCA performs a single identifiable function (e.g., power conversion, signal processing), it is classified by that function under the relevant HTS heading for functional units. When the assembly's function cannot be separated from the finished machine it is designed for, it may be classified as a part of that machine under GRI 2(a) or Note 2 to Section XVI. The intended end-use and the assembly's ability to perform its function independently are the key classification factors.
CBP applies the substantial transformation test: if the assembly process in Vietnam — soldering components to a board, testing, and conformal coating — constitutes a substantial transformation of the imported components into a new and different article, the PCA's country of origin is Vietnam, not China. However, CBP has scrutinized assembly-only operations that add minimal value, so the complexity of the assembly process and the degree of value addition in Vietnam are critical factors.
NAICSSector 33
National industry 1 of 6 in naics industry 33441
National industry 334418 · $19.4B of $22.6B
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Imports · July 2026
origin
Vietnam and Taiwan together supply 59% of it.
customs district
Census does not publish district detail for this classification system.
destination
None recorded for this period.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$19.4BYoY · Pro
Exports
$194.9MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.