Stacked cores for incorporation into transformers
Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof: > Parts: > Other: > Other > Other parts: > Of transformers: > Stacked cores for incorporation into transformers
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 8504.90.96.38
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.
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.
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.
CRGO Stacked Distribution Transformer Core
Cold-rolled grain-oriented (CRGO) silicon steel laminations precision-stacked for single-phase pole-mount distribution transformers. Imported without windings or tanks for final US assembly. Precisely matches HTS 8504.90.96.38 for stacked transformer cores.