| 8537.10.90 | 60 | Programmable controllers | No. | | | |
| 8537.20.00 | 20 | Switchgear assemblies and switchboards | No. | | | |
| 8538 | | Parts suitable for use solely or principally with the apparatus of heading 8535, 8536 or 8537: | | | | |
| 8538.10.00 | 00 | Boards, panels, consoles, desks, cabinets and other bases for the goods of heading 8537, not equipped with their apparatus | X | 3.7% | Free (A,AU,B,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 35% |
| 8538.90.10 | 00 | Printed circuit assemblies: | | | | |
| 8538.90.10 | 00 | Of an article of heading 8537 for one of the articles described in additional U.S. note 11 to chapter 85 | X | Free | | 35% |
| 8538.90.40 | 00 | Other, for the articles of subheading 8535.90.40, 8536.30.40 or 8536.50.40, of ceramic or metallic materials, electrically or mechanically reactive to changes in temperature | X | 3.5% | Free (A,AU,B,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 35% |
| 8538.90.80 | 20 | Of automatic circuit breakers | X | | | |
| 8538.90.80 | 60 | Other parts of switchgear, switchboards, panel boards and distribution boards | X | | | |
| 8539 | | Electrical filament or discharge lamps, including sealed beam lamp units and ultraviolet or infrared lamps; arc lamps; parts thereof: | | | | |
| 8539.10.00 | | Sealed beam lamp units | | 2% | Free (A,AU,B,BH, C,CA,CL,E,IL,J, JO,MA,MX,P, SG) | 20% |
| 8539.10.00 | 10 | For the vehicles of subheading 8701.20 or heading 8702, 8703, 8704, 8705 or 8711 | No. | | | |
| 8539.10.00 | 50 | For the vehicles of subheading 8701.20 or heading 8702, 8703, 8704, 8705 or 8711 | No. | | | |
| 8539.21.20 | 40 | For the vehicles of subheading 8701.20 or heading 8702, 8703, 8704, 8705 or 8711 | No. | | | |
| 8539.22.80 | 40 | Of a power 15 W or more but not exceeding 150 W | No. | | | |
| 8539.29.20 | 00 | Lamps having glass envelopes not over 6.35 mm in maximum diameter and suitable for use in cystoscopes and other surgical instruments | No. | 5.2% | Free (A,AU,BH,CA, CL,E,IL,J,JO, MA,MX,P,SG) | 55% |
| 8539.29.30 | 50 | Designed for a voltage of 12 V or more but not exceeding 14 V | No. | | | |
| 8539.31.00 | 50 | With a single plug-in base | No. | | | |
| 8539.31.00 | 60 | With a single screw-in base | No. | | | |
| 8539.31.00 | 40 | 1.2 m, straight tube, of a power 30 W or more but not exceeding 40 W | No. | | | |
| 8540 | | Thermionic, cold cathode or photocathode tubes (for example, vacuum or vapor or gas filled tubes, mercury arc rectifying tubes, cathode-ray tubes, television camera tubes); parts thereof: | | | | |
| 8540.11 | | Cathode-ray television picture tubes, including video monitor cathode-ray tubes: | | | | |
| 8540.11.10 | 40 | Exceeding 39 cm but not exceeding 45 cm | No. | | | |
| 8540.11.10 | 50 | Exceeding 45 cm but not exceeding 50 cm | No. | | | |
| 8540.11.10 | 55 | Exceeding 50 cm but not exceeding 63 cm | No. | | | |
Harmonized Tariff Schedule of the United States inquiry: gaming
