Transformer Condenser Insulation Kraft Paper
Specialty unbleached kraft paper for insulating windings in oil-immersed transformers and capacitors, in rolls ≤150 g/m². Falls under 4804.31.20.00 as other unbleached condenser paper due to its electrical performance from kraft pulp process.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mainly from recovered waste paper with Mullen burst ≥2 kPa·m²/g
Testliner or similar from recycled pulp with burst specs goes to 4805.24 per subheading note.
If other unbleached kraft >150 g/m²
Weight exceeding 150 g/m² shifts from 150 g/m² or less subheading to 4804.29.
If printed with motifs not subsidiary to use
Printed paper with primary pictorial content falls to chapter 49 per chapter note.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Obtain ISO certifications for electrical insulation class to support classification during CBP review
• Ensure declaration specifies 'condenser paper' not generic kraft to avoid default to 4804.29
Related Products under HTS 4804.31.20.00
Unbleached Kraft Condenser Tissue Paper
Thin unbleached kraft paper designed for use as condenser tissue in electrical capacitors, weighing under 150 g/m² and in rolls or sheets. It meets the specifications for 'other' kraft condenser paper under 4804.31.20.00 due to its high purity and dielectric properties from sulfate wood fibers. This paper is essential for insulation in high-voltage capacitors.
Electrical Grade Kraft Condenser Paper
Unbleached kraft paper specifically engineered for capacitor insulation, in rolls under 150 g/m², with high tensile strength and low moisture absorption. Classified under HTS 4804.31.20.00 as 'other' condenser paper, distinct from standard kraft due to its electrical insulation properties derived from sulfate pulp.
High-Density Kraft Capacitor Separator Paper
Unbleached, high-density kraft paper in sheets for separating capacitor electrodes, weighing 120 g/m² or less. It qualifies as 'other' condenser paper in 4804.31.20.00 for its role in energy storage devices, made from ≥80% sulfate wood fibers.
Capacitor Grade Unbleached Kraft Separator Sheet
Sheets of unbleached kraft paper optimized as separators in electrolytic capacitors, under 150 g/m². Classified in HTS 4804.31.20.00 for other condenser applications, leveraging kraft's strength and purity.