Parts for Industrial & Laboratory Furnaces, Ovens, and Heating Equipment

Parts classifiable under 8514904000 must be identifiable as components of microwave ovens — such as magnetrons, waveguide assemblies, or turntable motors designed for microwave units. General heating elements, refractory liners, control boards, or structural components for resistance, induction, or arc furnaces fall under 8514908000. When a part is common to both microwave and non-microwave equipment, classification follows the principal-use rule.

Country of origin for duty purposes is determined by where the part itself was manufactured or substantially transformed, not where the parent furnace was made. A replacement heating element manufactured in Mexico for a German-origin furnace would be assessed duties based on Mexican origin. However, if the part is imported alongside the original equipment as an accessory, it may be classified with the main equipment under GRI 3. Trade-remedy applicability (e.g., Section 301 for Chinese-origin parts) is also determined by the part's own origin.