8533.21.00 - For a power handling capacity not exceeding 20 W

This category, HTS 8533.21.00, specifically covers "Other fixed resistors" designed for a power handling capacity not exceeding 20 Watts. These are electrical components that impede the flow of electric current and are designed to remain at a constant resistance value. This classification distinguishes them from variable resistors like rheostats and potentiometers, as well as heating resistors.

Within the broader group of fixed resistors, this code is distinct from its sibling, 8533.29.00.00, which encompasses fixed resistors with a power handling capacity exceeding 20 Watts. Therefore, the primary differentiating factor for classification under 8533.21.00 is the wattage rating; if a fixed resistor has a power handling capacity of 20W or less, it falls into this category.

While this node itself describes a specific group of resistors, it serves as a branching point for further detailed classification. The subcategories under 8533.21.00 address specific physical configurations and functionalities, such as resistors designed for surface mounting (SMD) by contact, resistor networks that feature more than two leads, and a general "Other" subcategory for fixed resistors with a power handling capacity not exceeding 20W that do not fit into the more specific subdivisions.