Essential character controls tariff classification: water-cooled electric resistors remained classifiable as resistors, not residuary electrical parts.

Imported water-cooled electric resistors retained their essential character as electric resistors because the cooling arrangement merely controlled heat generated during resistor function and did not create a separate commercial or tariff identity. The article therefore fell under Heading 8533.29 as an electric resistor, and not under the residuary Heading 8548.90 for electrical parts not specified elsewhere in Chapter 85. The Explanatory Notes to Heading 85.33, including the example of an oil-immersed resistor, supported classification by principal identity rather than by ancillary features.

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Issues: Whether the imported water-cooled electric resistor was correctly classifiable under Heading 8533.29 as an electric resistor, or under Heading 8548.90 as electrical parts not specified elsewhere in Chapter 85.

Analysis: The item was found to be nothing other than an electrical resistor. The water-cooling arrangement and other features were only meant to control heat generated in the course of its resistor function and did not give it a separate or distinct character. Since the cooling arrangement merely supported the performance of the resistor, the article did not cease to be a resistor. The illustration of an oil-immersed resistor in the Explanatory Notes to Heading 85.33 supported this view.

Conclusion: The goods were classifiable as an electric resistor under Heading 8533.29 and not under the residuary heading 8548.90.

Ratio Decidendi: An article remains classifiable according to its essential character and principal identity when ancillary features merely facilitate its functioning and do not create a distinct commercial or tariff identity.

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