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HSChapter 85
U.S. imports of thyristors, diacs, and triacs (non-photosensitive) (HS 854130) totaled $8.5M in May 2026, traded with 37 countries.
Importers of Thyristors, DIACs, and TRIACs (Non-Photosensitive) paid $427K in duties in May 2026 — an effective duty rate of 48% on $882K in dutiable value, based on actual customs collections rather than the published tariff schedule. Thyristors, DIACs, and TRIACs (Non-Photosensitive) imports of $8.5M in May 2026 ran 17% above the year-to-date monthly average of $7.2M.
Last updated: May 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.
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.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| GERMANY | $3.4M | $177K | -$3.3M |
| MEXICO | $214K | $1.2M | +$987K |
| CHINA | $1.1M | $122K | -$936K |
| CZECH REPUBLIC | $648K | -- | -$648K |
| JAPAN | $541K | $69K | -$472K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8541300080 | THYRISTORS,DIACS & TRIACS,NOT PHOTOSENSITIVE,NESOI | $7.9M | 5.62% | 13.11% | $443K |
| 8541300040 | CHIPS FOR THYRISTORS,DIACS AND TRIACS | $525K | 7.67% | 61.12% | $40K |
THYRISTORS,DIACS & TRIACS,NOT PHOTOSENSITIVE,NESOI
CHIPS FOR THYRISTORS,DIACS AND TRIACS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8541300080 | THYRISTORS,DIACS & TRIACS,NOT PHOTOSENSITIVE,NESOI | $3.5M |
| 8541300040 | CHIPS FOR THYRISTORS,DIACS AND TRIACS | $930K |
THYRISTORS,DIACS & TRIACS,NOT PHOTOSENSITIVE,NESOI
1.2M no
CHIPS FOR THYRISTORS,DIACS AND TRIACS
56.1K no
MACH FOR RECP/CONVR/TRANS/REGN OF VOICE/IMAGE/DATA
HS 851762
SOLID-STATE NON-VOL SEMICONDUCTOR STORAGE DEVICES
HS 852351
SMARTPHONES
HS 851713
PROCESSORS AND CONTROLLERS, ELECTRONIC INTEG CIRCT
HS 854231
CONTROLS ETC W ELECT APPR F ELECT CONT NOV 1000 V
HS 853710
STATIC CONVERTERS; ADP POWER SUPPLIES
HS 850440
| State | Imports | Exports | Balance |
|---|---|---|---|
| California | $1.8M | $838K | -$1.0M |
| Illinois | $1.6M | $149K | -$1.4M |
| Washington | $1.2M | -- | -$1.2M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHICAGO, IL | $1.9M | $206K | -$1.7M |
| LOS ANGELES INTERNATIONAL AIRPORT, CA | $1.1M | $107K | -$1.0M |
| SEATTLE-TACOMA INTERNATIONAL AIRPORT, WA | $1.2M | -- | -$1.2M |