Having a power handling capacity not exceeding 50 kVA
Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof: > Liquid dielectric transformers: > Having a power handling capacity not exceeding 650 kVA > Having a power handling capacity not exceeding 50 kVA
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 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 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(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8504.21.00.20
15 kVA Pad-Mounted Liquid-Filled Distribution Transformer
This pad-mounted transformer uses mineral oil as a liquid dielectric and has a power handling capacity of 15 kVA, designed for outdoor utility distribution in residential areas. It steps down voltage from primary distribution lines to service levels. Classified under HTS 8504.21.0020 due to its liquid dielectric and capacity not exceeding 50 kVA.
25 kVA Pole-Mounted Mineral Oil Transformer
A single-phase pole-mounted transformer filled with mineral oil dielectric, rated at 25 kVA for rural and urban overhead distribution systems. It converts high-voltage distribution to lower utilization voltages. Fits HTS 8504.21.0020 as a liquid dielectric unit under 50 kVA.
30 kVA Three-Phase Padmount Transformer
Three-phase liquid-filled pad-mounted transformer with 30 kVA capacity using vegetable oil dielectric for underground residential distribution (URD). Provides balanced power to multi-unit buildings. HTS 8504.21.0020 applies for its liquid dielectric and low kVA rating.
10 kVA Single-Phase Overhead Transformer
Compact 10 kVA single-phase transformer with silicone liquid dielectric for pole-top installation in overhead distribution networks. Offers high fire point for safety in populated areas. Classified in 8504.21.0020 for liquid dielectric ≤50 kVA.
45 kVA Mineral Oil Distribution Transformer
Conventional 45 kVA liquid-filled distribution transformer using mineral oil, designed for substation or pole mounting in medium-density areas. Steps down 13.8 kV to 240/480V. Meets HTS 8504.21.0020 criteria for <50 kVA liquid dielectric transformers.
20 kVA Vegetable Ester Fluid Transformer
Environmentally friendly 20 kVA transformer using vegetable ester dielectric fluid (FR3), suitable for indoor/outdoor padmount applications with high fire safety requirements. Biodegradable alternative to mineral oil. HTS 8504.21.0020 for liquid dielectric <50 kVA.
5 kVA Control Transformer with Mineral Oil
Small 5 kVA liquid dielectric transformer for industrial control panels and motor starters, using mineral oil cooling. Provides stable voltage for PLC and relay systems. Fits 8504.21.0020 as low-capacity liquid-filled unit.
37.5 kVA Loop-Feed Padmount Transformer
Dual voltage 37.5 kVA pad-mounted transformer with mineral oil dielectric, featuring loop-feed design for radial distribution systems allowing service continuity. Common in commercial complexes. HTS 8504.21.0020 for <50 kVA liquid type.
50 kVA Single-Phase Conventional Transformer
Maximum capacity 50 kVA single-phase mineral oil transformer for light commercial service drops, pole or pad mountable. Standard distribution voltages 7.2kV-240V. Borderline HTS 8504.21.0020 classification for ≤50 kVA liquid dielectric.
25 kVA Silicone Fluid Fire-Safe Transformer
High fire-point silicone dielectric fluid transformer rated 25 kVA for locations prohibiting mineral oil (hospitals, tunnels). Less flammable alternative meeting NFPA standards. 8504.21.0020 as liquid dielectric <50 kVA.