Harmonized System
U.S. exports of Parts and Accessories for Electrical Measurement, Checking, and Ionizing Radiation Instruments (HS 903090) totaled $171.8M in August 2026.
Importers of Parts and Accessories for Electrical Measurement, Checking, and Ionizing Radiation Instruments paid $8.8M in duties in August 2026, an average duty rate of 9.01% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataParts and accessories for the full range of heading 9030 instruments — from printed circuit assemblies for radiation detectors to mechanical components for semiconductor testers — are organized across more than a dozen 10-digit US tariff lines that map directly to the parent instrument subheading. The granular structure means that a printed circuit assembly for a semiconductor wafer instrument (9030906600) carries a different classification than one for a general recording instrument (9030906800), so correct identification of the parent instrument is the first classification step. Malaysia, Taiwan, and Germany are the leading US import sources for this parts category. Importers should note that parts subject to Section 301 tariffs on goods of Chinese origin remain a compliance consideration even when the finished instrument itself is sourced elsewhere.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
6.1K import shipments a month
The correct line depends on which parent instrument subheading the PCB is designed for. For example, printed circuit assemblies for semiconductor wafer instruments fall under 9030906600, while those for other recording instruments fall under 9030906800. The importer should identify the finished instrument's subheading first, then match it to the corresponding parts line. Technical documentation linking the PCB to a specific instrument model and its HTS classification is essential.
Generally no — once an article is identifiable as a part or accessory of a heading 9030 instrument, it belongs in the parts subheading (903090) rather than the instrument subheading itself. The exception would be if the part is more specifically described elsewhere in the tariff schedule. GRI 1 and the relevant section and chapter notes govern, and CBP has historically been strict about keeping parts in the parts provision.
Subheading 1 of 11 in heading 9030
Subheading 903090 · $171.8M of $560.2M
Trade Directory
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
Printed Circuit Assemblies Excpt for 9030.10, NESOI
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$96.9MYoY · free account
Exports
$171.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.2B of Parts and Accessories for Electrical Measurement, Checking, and Ionizing Radiation Instruments and exported $1.6B.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Taiwan and Malaysia together take 50% of it.
customs district
origin
entry
rate provision · imports
27.7% enters free of duty; duty collected equals 9.01% of imports for consumption.