8511.90.20.00 - Designed for use on 6, 12 or 24 V systems

This HTS category, 8511.90.20.00, specifically covers parts designed for use within 6, 12, or 24-volt electrical ignition or starting systems for internal combustion engines. This includes components that regulate voltage and current within these systems, particularly those incorporating a cut-out relay. The "designed for use on 6, 12 or 24 V systems" qualifier is crucial for distinguishing these parts from other electrical components.

While sibling category 8511.90.40.00 encompasses "Other" parts of electrical ignition or starting equipment, this subcategory is reserved for those specific voltage and voltage-current regulators that include a cut-out relay and are intended for the specified low-voltage systems. Therefore, if a part functions as a voltage/current regulator for these engine systems and contains a cut-out relay, it falls here. If it is a part of the ignition or starting system but does not meet these specific criteria, it would likely be classified under the broader "Other" category.

As a leaf node, this category does not have further subdivisions. The classification criteria focus on the functional role of the part as a regulator with a cut-out relay, and its intended application within low-voltage (6, 12, or 24 V) automotive or other internal combustion engine electrical systems. Examples of items that would fall under this classification might include specific types of voltage regulators with integrated cut-out relays used in older automotive alternators or similar engine starting circuits.