| 8540.71 | | Microwave tubes (for example, magnetrons, klystrons, traveling wave tubes, carcinotrons), excluding grid-controlled tubes: | | | | |
| 8540.71.20 | 00 | Modified for use as parts of microwave ovens | No. | Free | | 35% |
| 8540.81.00 | 00 | Other tubes: | | | | |
| 8540.81.00 | 00 | Receiver or amplifier tubes | No. | 4.2% | Free (A+,AU,B,BH, CA,CL,D,E,IL,J, JO,MA,MX,P, SG) | 35% |
| 8540.89.00 | 20 | Gas and vapor electron tubes | No. | | | |
| 8540.89.00 | 60 | Light-sensing tubes | No. | | | |
| 8540.91 | | Of cathode-ray tubes: | | | | |
| 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 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.10.00 | 70 | With a maximum current of 0.5 A or less | No. | | | |
| 8541.21.00 | 75 | With an operating frequency not less than 100 MHz | No. | | | |
| 8541.21.00 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.29.00 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.29.00 | 75 | With an operating frequency not less than 30 MHz | No. | | | |
| 8541.30.00 | 40 | Unmounted chips, dice and wafers | No. | | | |
| 8541.40 | | Photosensitive semiconductor devices, including photovoltaic cells whether or not assembled in modules or made up into panels; light-emitting diodes: | | | | |
| 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: | | | | |
Harmonized Tariff Schedule of the United States inquiry: 3203Ã
