| 8540.99.40 | 00 | Electron guns; radio frequency (RF) interaction structures for microwave tubes of subheadings 8540.71 through 8540.79, inclusive | X | Free | | 35% |
| 8541 | | Diodes, transistors and similar semiconductor devices; photosensitive semiconductor devices, including photovoltaic cells whether or not assembled in modules or made up into panels; light-emitting diodes; mounted piezoelectric crystals; parts thereof: | | | | |
| 8541.10.00 | | Diodes, other than photosensitive or light-emitting diodes | | Free | | 35% |
| 8541.10.00 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.21.00 | | With a dissipation rate of less than 1 W | | Free | | 35% |
| 8541.21.00 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.29.00 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.30.00 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.30.00 | | Thyristors, diacs and triacs, other than photosensitive devices | | Free | | 35% |
| 8541.40 | | Photosensitive semiconductor devices, including photovoltaic cells whether or not assembled in modules or made up into panels; light-emitting diodes: | | | | |
| 8541.40.20 | 00 | Light-emitting diodes (LED's) | No. | Free | | 20% |
| 8541.40.60 | | Other diodes | | Free | | 35% |
| 8541.40.60 | 10 | Unmounted chips, dice and wafers | No. | | | |
| 8541.40.60 | 20 | Assembled into modules or made up into panels | No. | | | |
| 8541.40.70 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.40.80 | 00 | Optical coupled isolators | No. | Free | | 35% |
| 8541.50.00 | | Other semiconductor devices | | Free | | 35% |
| 8541.50.00 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.60.00 | | Mounted piezoelectric crystals | | Free | | 35% |
| 8541.60.00 | 10 | Quartz designed for operating frequencies of: | | | | |
| 8541.60.00 | 20 | Not exceeding 1 MHz, except 32.768 kHz | No. | | | |
| 8541.60.00 | 30 | Exceeding 1 MHz, but not exceeding 5 MHZ | No. | | | |
| 8541.60.00 | 50 | Exceeding 5 MHZ, but not exceeding 20 MHz | No. | | | |
| 8541.60.00 | 60 | Exceeding 20 MHZ | No. | | | |
| 8542 | | Electronic integrated circuits; parts thereof: | | | | |
Harmonized Tariff Schedule of the United States inquiry: 3920590000
