8501.40 - Other AC motors, single-phase:

This category, HTS 8501.40, encompasses "Other AC motors, single-phase," excluding those specifically classified under preceding headings. It covers a broad range of single-phase alternating current motors that do not fall into more granular classifications based on output or specific motor type. These are distinct from multi-phase AC motors (8501.6x) and universal AC/DC motors (8501.20), which are defined by their operational voltage characteristics and power conversion capabilities.

The primary distinction for items within 8501.40 lies in their single-phase AC power requirement and their omission from the sub-37.5 W output classification (8501.10). This category serves as a catch-all for single-phase AC motors that exceed the specified lower output threshold.

Within this broader grouping, subcategories are established to further refine classification based on motor output power. These subdivisions include motors of an output exceeding 37.5 W but not exceeding 74.6 W (8501.40.20), those exceeding 74.6 W but not exceeding 735 W (8501.40.40), and motors exceeding 735 W but under 746 W (8501.40.50). Finally, a residual category, 8501.40.60, is provided for all other single-phase AC motors not meeting the specific output ranges of the preceding subheadings. This hierarchical structure ensures precise classification based on the motor's power delivery capability.