8504.90.65.00 - Of the goods of subheading 8504.40 or 8504.50 for telecommunication apparatus

This HTS classification, 8504.90.65.00, specifically covers printed circuit assemblies that serve as parts for electrical transformers, static converters (rectifiers), and inductors, provided these components are intended for use in telecommunication apparatus. These assemblies are characterized by being pre-assembled electronic circuits mounted on a printed circuit board, containing various electronic components like resistors, capacitors, integrated circuits, and other active or passive elements, designed to fulfill a specific function within the larger apparatus. The critical element for classification here is the intended application within telecommunication equipment.

Distinguishing this category from its sibling, 8504.90.75.00 ("Other"), is the explicit requirement for these printed circuit assemblies to be for telecommunication apparatus. The "Other" category at this level would encompass printed circuit assemblies that are parts of transformers, converters, or inductors but are *not* destined for telecommunication applications, or those assemblies that do not meet the criteria for specific subheadings under 8504.90. Therefore, the end-use or intended application in telecommunication systems is the primary differentiating factor.

As this is a leaf node, there are no further subcategories to introduce. Classification within 8504.90.65.00 relies on identifying the printed circuit assembly as a part of a transformer, static converter, or inductor, and verifying its intended use within telecommunication apparatus. This means examining documentation, product specifications, or the overall context of the larger equipment it is designed to integrate with.