Of ceramics
Electrical insulators of any material: > Of ceramics
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Subheadings
Products classified under HTS 8546.20.00
Steatite Ceramic Bushing Insulator
A steatite ceramic bushing used in switchgear to insulate conductors passing through enclosures, with threaded metal ends for mounting. HTS 8546.20.00 applies as it is a ceramic electrical insulator for medium-voltage applications.
Zirconia Ceramic Stand-Off Insulator
A high-strength zirconia ceramic stand-off insulator for mounting busbars in electrical panels, resistant to thermal shock. It qualifies under HTS 8546.20.00 as a ceramic electrical insulator for industrial power distribution.
Silicon Carbide Surge Arrester Insulator
Porcelain housing for silicon carbide surge arresters protecting transformers from lightning, with high puncture resistance. Falls under HTS 8546.20.00 as the ceramic electrical insulator body.
Steatite Ceramic Terminal Block Insulator
Low-voltage steatite ceramic base for terminal blocks in control panels, isolating screw terminals. Classified HTS 8546.20.00 for ceramic electrical insulation preventing short circuits.
Alumina Ceramic Feedthrough Insulator
Hermetically sealed 99.5% alumina ceramic feedthrough for high-vacuum systems, passing conductors while maintaining insulation. HTS 8546.20.00 for this ceramic electrical insulator in RF/microwave applications.
Porcelain Pin-Type Insulator
Traditional porcelain pin insulator for distribution poles (11-33kV), screwed onto wooden crossarms. Ceramic construction qualifies under HTS 8546.20.00 for primary electrical insulation.
Machinable Ceramic Insulator Sleeve
Macor machinable glass-ceramic sleeve insulator for custom electrical standoffs in prototypes. True ceramic composition places it in HTS 8546.20.00 as electrical insulator.
High-Purity Alumina Submount Insulator
99.9% alumina ceramic submount for power semiconductor modules, providing thermal and electrical isolation. HTS 8546.20.00 for ceramic electrical insulators in IGBT modules.
Ceramic Pothead Insulator
Large porcelain pothead insulator for cable termination in substations (69-230kV). Provides stress relief and insulation; HTS 8546.20.00 for ceramic construction.
Beryllia Ceramic RF Insulator
Beryllium oxide (BeO) ceramic insulator for RF power transistors, offering high thermal conductivity with insulation. Special controlled ceramic under HTS 8546.20.00.
High-Voltage Porcelain Post Insulator
A cylindrical porcelain insulator designed for supporting high-voltage power lines on utility poles, featuring a glazed surface for weather resistance. Classified under HTS 8546.20.00 as it is made entirely of ceramic material to provide electrical insulation in overhead transmission systems.
Alumina Ceramic Spool Insulator
A precision-machined spool-shaped insulator made from 95% alumina ceramic, used in electrical coils and transformers for wire support. It falls under HTS 8546.20.00 because it is a ceramic electrical insulator preventing current leakage in high-voltage applications.
Porcelain Suspension Insulator Disc
A single porcelain disc unit for string suspension insulators in extra-high-voltage transmission lines, featuring ball-and-socket design. Classified in HTS 8546.20.00 for its ceramic construction providing high mechanical and electrical strength.
Cordierite Ceramic Bobbin Insulator
A cordierite ceramic bobbin for winding magnet wire in inductors and relays, providing interlayer insulation. HTS 8546.20.00 covers this ceramic electrical insulator due to its low thermal expansion properties.