8538.90.10.00 - Of an article of heading 8537 for one of the articles described in additional U.S. note 11 to chapter 85

This HTS category, 8538.90.10.00, specifically classifies printed circuit assemblies that are designed for use as parts or accessories for apparatus falling under heading 8537. Heading 8537 covers apparatus for electric currents up to 1,000 volts, such as switchboards, control panels, and consoles. The crucial differentiator for this subheading is that these printed circuit assemblies must be intended for use with specific articles enumerated in Additional U.S. Note 11 to Chapter 85, which often pertains to programmable logic controllers and similar industrial control equipment.

Unlike its sibling category, 8538.90.30.00 (Other), this subheading is limited to *printed circuit assemblies*. This means the classification is for assembled boards containing electronic components, as opposed to other types of parts or accessories for heading 8537 apparatus that might be classified under the "Other" subheading. The "Other" category would encompass items like housings, connectors, or other non-electronic components not constituting a printed circuit assembly.

As this is a leaf node, there are no further subcategories. Therefore, classification within 8538.90.10.00 depends on confirming that the printed circuit assembly is indeed a component of a device described in heading 8537 and specifically referenced by Additional U.S. Note 11. Importers should verify the intended application and compatibility of the printed circuit assembly with the apparatus it is designed to serve.