U.S. imports of Thyristors, DIACs, and TRIACs (Non-Photosensitive) (HS 854130) totaled $7.8M in August 2026, imported from 40 countries.
Importers of Thyristors, DIACs, and TRIACs (Non-Photosensitive) paid $730K in duties in August 2026, an average duty rate of 9.78% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataThyristors, DIACs, and TRIACs are the workhorses of AC power control, used in motor speed controllers, light dimmers, and industrial power switching — applications that demand high surge-current tolerance and precise gate triggering. Germany and Japan lead US supply under this heading, consistent with the European and Japanese dominance in industrial power semiconductor manufacturing. The heading splits into chips (8541300040) and finished devices (8541300080), so the stage of manufacture is the primary classification determinant.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
679 import shipments a month
For HTS classification, DIACs and TRIACs are grouped together with thyristors under 854130 — the distinction between device types does not create separate tariff lines at the 10-digit level. Both finished devices fall under 8541300080, while unfinished chips for any of these device types fall under 8541300040. The device type matters more for end-use documentation than for tariff-line selection.
China does not appear among the top suppliers for this heading based on available trade data, with Germany and Japan leading imports. However, if sourcing shifts to Chinese-origin product, Section 301 applicability should be confirmed for the specific 10-digit line, as semiconductor components have been broadly covered under those measures.
Subheading 11 of 12 in heading 8541
Subheading 854130 · $7.8M of $1.3B
ImportsExports
Imports
$7.8MYoY · free account
Exports
$5.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $89.9M of Thyristors, DIACs, and TRIACs (Non-Photosensitive) and exported $58.6M.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Germany and China together supply 53% of it. China pays 50.0% duty; Germany 0.0%.
customs district
destination
entry
rate provision · imports
53.4% enters free of duty; duty collected equals 9.78% 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 |
|---|---|---|---|---|---|
| 8541300080 | Thyristors, Diacs & Triacs, Not Photosensitive, NESOI | $6.8M | 9.94% | 22.38% | $673K |
| 8541300040 | Chips for Thyristors, Diacs and Triacs | $702K | 8.22% | 42.03% | $58K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8541300080 | Thyristors, Diacs & Triacs, Not Photosensitive, NESOI | $3.6M |
| 8541300040 | Chips for Thyristors, Diacs and Triacs | $1.6M |
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.
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