Tariff classification of static converters turns on actual function, not component composition, and Heading 85.37 was held inapplicable.

Tariff classification of static converters depended on the actual function of the goods, not merely on their components or use in control assemblies. The Tribunal held that Chapter Heading 85.04 covers static converters that convert electrical energy for further use, while Heading 85.37 applies only to boards and panels equipped for electric control and distribution. On the technical record and comparable classification, the goods were not control panels under Heading 85.37 and were correctly classifiable under Heading 85.04. The duty, interest and penalty confirmed on the basis of Heading 85.37 were therefore unsustainable, and the impugned order was set aside.

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Issues: Whether the goods manufactured as static converters were classifiable under Chapter Heading 85.04 as static converters or under Chapter Heading 85.37 as panels for control and distribution of electricity, and whether the consequential demand of duty, interest and penalty could be sustained.

Analysis: The classification turned on the actual function of the goods and the scope of the competing tariff headings. Chapter Heading 85.04 covered static converters, while Heading 85.37 covered boards and panels equipped for electric control and distribution. The Commissioner's view rested largely on the composition of inputs and on the HSN notes for Heading 85.37, but the Tribunal held that Heading 85.37 applies only where the apparatus performs control and distribution of electricity. The record, including technical material and an accepted classification in comparable goods, showed that the subject goods were static converters converting electrical energy for further use and not control panels within Heading 85.37. The Tribunal also rejected the demand and penalty once the classification under Heading 85.37 was found unsustainable.

Conclusion: The goods were classifiable under Chapter Heading 85.04 and not under Chapter Heading 85.37; the duty, interest and penalty confirmed on the basis of Heading 85.37 were unsustainable.

Final Conclusion: The impugned order was set aside and the appeal was allowed, with the classification and all consequential fiscal demands decided in favour of the assessee.

Ratio Decidendi: For tariff classification, the controlling test is the actual function of the goods within the scope of the relevant heading, and a heading for electric control and distribution cannot be invoked merely because the product incorporates components used in panels or control assemblies.

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