8408.90.90.30 - Exceeding 373 kW but not exceeding 746 kW

This HTS category, 8408.90.90.30, specifically classifies compression-ignition internal combustion piston engines, also known as diesel or semi-diesel engines, that fall within a particular power output range. These are engines designed to ignite fuel without a spark plug, relying on the heat generated by compressing air. The defining characteristic for this classification is their power output, which must exceed 373 kilowatts (kW) but not exceed 746 kilowatts (kW).

This classification distinguishes itself from its sibling categories by its precise power output threshold. For instance, it is separate from 8408.90.90.20, which covers engines with a lower power output (exceeding 149.2 kW but not exceeding 373 kW), and 8408.90.90.40, which classifies engines with higher power outputs (exceeding 746 kW but not exceeding 1,119 kW). Engines in this 373 kW to 746 kW range are typically found in heavier industrial machinery, larger vehicles, or power generation equipment that requires a substantial but not the absolute highest tier of engine power.

As this is a leaf node within the HTS, there are no further subcategories to subdivide this specific power range. Therefore, classification within 8408.90.90.30 is solely determined by the engine's compression-ignition design and its output falling strictly between 373 kW and 746 kW, inclusive of the upper bound. This ensures precise tariff treatment based on the engine's capacity and application.