Alumina Ceramic Post Insulators
Cylindrical post insulators made from 95% alumina ceramic for use in electrical substations to support busbars and equipment up to 36kV. They offer high puncture resistance and tracking resistance in polluted environments. Falls under 8546.20.00.90 as other ceramic electrical insulators.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If of other materials like polymer or composite
Non-ceramic insulators (e.g., silicone rubber) classify under 8546.90 for other materials.
If for low-voltage decorative or non-electrical uses
Plastic insulators without high dielectric requirements fall under Chapter 39 plastics.
If sold as integral transformer components
Insulators permanently attached to transformers classify as parts of electrical transformers.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide alumina purity percentage (>92%) and IEC 60168 standard compliance certificates
• Label with creepage distance (minimum 31mm/kV) to demonstrate electrical performance
• Avoid misdeclaration as 'silicon carbide' types which may require different surge protection classification
Related Products under HTS 8546.20.00.90
High-Voltage Porcelain Suspension Insulators
These ceramic suspension insulators are designed for supporting high-voltage overhead power transmission lines, typically rated 69kV or higher. Made from high-alumina porcelain, they provide electrical insulation and mechanical strength under extreme weather conditions. Classified under 8546.20.00.90 as ceramic electrical insulators not specified elsewhere in the subheading.
Steatite Ceramic Bushings
Steatite (magnesium silicate) ceramic bushings used in low to medium voltage switchgear for conductor insulation through enclosure walls. Known for low electrical loss and high thermal stability up to 1000°C. Classified in 8546.20.00.90 as other ceramic electrical insulators.
Cordierite Ceramic Stand-Off Insulators
Threaded stand-off insulators made from cordierite ceramic for mounting electrical components in high-frequency RF equipment. They provide phase-to-phase insulation with low dielectric constant (6.0 max). HTS 8546.20.00.90 covers these other ceramic electrical insulators.
Zirconia Ceramic Spark Plug Insulators
High-strength zirconia insulators for automotive and industrial spark plugs, providing 30kV+ dielectric strength and thermal shock resistance. The ceramic core insulates the central electrode from the metal shell. Classifies under 8546.20.00.90 as other ceramic electrical insulators.
Porcelain Pin-Type Insulators
Pin-type porcelain insulators for distribution poles (11-33kV class) with cemented steel pins for mechanical attachment. Brown glaze finish resists contamination tracking. HTS 8546.20.00.90 for other ceramic electrical insulators.
Silicon Carbide Surge Arrestor Insulators
Ceramic housings for SiC gapless surge arrestors protecting transformers from lightning strikes (up to 200kA). Porcelain body with high mechanical strength (12kN cantilever). 8546.20.00.90 classification for ceramic electrical insulators.