Harmonized System
U.S. imports of Parts for Diodes, Transistors & Similar Semiconductor Devices (HS 854190) totaled $114.9M in August 2026, imported from 48 countries.
Importers of Parts for Diodes, Transistors & Similar Semiconductor Devices paid $1.8M in duties in August 2026, an average duty rate of 1.53% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Parts for Diodes, Transistors & Similar Semiconductor Devices imports of $114.9M in August 2026 ran 26% above the year-to-date monthly average of $91.3M.
Last updated: August 2026 dataParts destined for discrete semiconductor devices, photosensitive semiconductors, and mounted piezoelectric crystals enter under this heading, which also captures a commercially significant subset: frames for photovoltaic cells assembled in modules or panels (8541900010), a line that has drawn heightened customs scrutiny given solar supply-chain enforcement actions. Vietnam and Malaysia lead US imports under this heading, reflecting the regional shift of semiconductor back-end and component manufacturing into Southeast Asia. The remaining lines (8541900000 and 8541900080) cover a broad range of lead frames, housings, and subassemblies used in discrete device production. Importers of solar-related parts should be aware of Withhold Release Orders and forced-labor due-diligence requirements that may apply to certain supply chains.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.4K import shipments a month
Frames specifically for photovoltaic cells assembled in modules or panels are explicitly provided for under 8541900010 within this heading, not under the finished module headings. However, if a frame is imported as part of a complete module, the entire article would typically classify as the finished module. The distinction matters because separate parts entries may carry different duty exposure, including any applicable trade-remedy orders.
CBP has issued Withhold Release Orders targeting goods produced with forced labor from specific facilities in various countries. Importers sourcing semiconductor parts from Vietnam and Malaysia — the leading suppliers under this heading — should conduct supply-chain due diligence, maintain documentation of labor practices at each tier of production, and monitor the CBP Forced Labor Enforcement list. The Uyghur Forced Labor Prevention Act may also apply if any upstream materials originate from the Xinjiang region of China.
Subheading 4 of 12 in heading 8541
Subheading 854190 · $114.9M of $1.3B
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ImportsExports
Imports
$114.9MYoY · free account
Exports
$49.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $985.6M of Parts for Diodes, Transistors & Similar Semiconductor Devices and exported $705.7M.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Vietnam and Malaysia together supply 67% of it.
customs district
destination
entry
rate provision · imports
94.8% enters free of duty; duty collected equals 1.53% of imports for consumption.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8541900010 | Frames for Phtovltaic Cells Assm in Modules/Panels | $92.5M | 0.65% | 3.44% | $600K |
| 8541900080 | Diode, Transistor & Smlr Semiconductr Device Parts | $22.4M | 5.15% | 12.10% | $1.2M |
| 8541900000 | Diode, Transistor & Smlr Semiconductr Device Parts | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8541900000 | Diode, Transistor & Smlr Semiconductr Device Parts | $49.8M |
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.