Three-Phase E-I Stacked Transformer Core
Interleaved E-I shaped laminations stacked for three-phase power transformer cores, typically using CRGO steel. These pre-assembled stacks reduce manufacturing time when windings are added domestically. Falls under HTS 8504.90.96.38 as stacked cores for transformer incorporation.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the stacked core includes insulation coatings between laminations
Insulated cores may qualify under different 'other parts' categories based on completion level.
If constructed with welded steel frames rather than pure laminations
Fabricated steel structures revert to Chapter 73 classifications.
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Import Tips & Compliance
• Include phase configuration drawings and stack height specs to demonstrate three-phase transformer specificity
• Anti-dumping duties may apply to certain silicon steel cores from specific countries; check Commerce Department scopes
• Avoid bundling with yokes or frames, as that could shift classification to other transformer part subheadings
Related Products under HTS 8504.90.96.38
Silicon Steel Stacked Transformer Core
A laminated stack of silicon steel sheets forming a core designed for assembly into power distribution transformers. These cores provide the magnetic pathway essential for transformer operation and are imported as unfinished components for final winding and enclosure. Classified under HTS 8504.90.96.38 as stacked cores specifically for incorporation into transformers.
High-Efficiency UI Stacked Transformer Core
UI-shaped silicon steel laminations stacked and hinged for easy assembly in high-efficiency transformers used in renewable energy inverters. These cores meet DOE efficiency standards when fully assembled. HTS 8504.90.96.38 covers such pre-stacked configurations.
Toroidal Stacked Transformer Core Blank
Pre-cut and stacked ring-shaped silicon steel laminations forming toroidal cores for audio and power transformers. These require final winding but provide precise magnetic paths. Classified as stacked cores under HTS 8504.90.96.38.
Industrial Furnace Stacked Transformer Core
Heavy-gauge silicon steel stacks designed for high-current furnace transformers in steel mill applications. These cores handle extreme thermal and magnetic stresses. HTS 8504.90.96.38 specifically includes such stacked cores for transformer incorporation.
EV Charger Stacked Transformer Core
Compact high-frequency silicon steel stacks for Level 2 EV charger transformers, optimized for 240V/32A operation. Imported for final integration into charging station manufacturing. Meets HTS 8504.90.96.38 stacked core definition.
Amorphous Metal Stacked Transformer Core
Stacked laminations made from amorphous metal alloy (metglas) optimized for low-loss distribution transformers. These cores are pre-cut and interleaved for direct incorporation into transformer manufacturing processes. HTS 8504.90.96.38 applies to such unfinished stacked cores destined for transformer assembly.