HS Code for Metal film resistors

Metal film resistors are classified under HS code 8533.21. This classification falls within Chapter 85, which encompasses electrical machinery and equipment. Heading 8533 is dedicated to electrical resistors (including rheostats and potentiometers), excluding heating resistors. The specific subheading 8533.21 is designated for fixed resistors with a power handling capacity not exceeding 20 Watts. Metal film resistors are constructed by depositing a thin layer of metal or metal oxide onto a ceramic or glass substrate. This technical composition is what distinguishes them from carbon-based resistors. Under the Harmonized System, the classification is driven by the physical nature of the resistive element and the electrical capacity of the component. Since most metal film resistors used in precision electronics, telecommunications, and consumer devices operate at low wattages (typically 1/8W, 1/4W, or 1/2W), they almost always fall under the 20W threshold of 8533.21. The precision and stability of metal film technology make them a distinct category in trade statistics compared to wirewound or carbon composition types.

Products Included

• Precision metal film fixed resistors
• Surface mount (SMD) metal film resistors
• Metal oxide film resistors (fixed)
• Thin-film resistors for high-frequency applications
• MELF (Metal Electrode Leadless Face) resistors

Common Misclassification

The most common misclassification occurs with HS code 8533.10, which is reserved for fixed carbon resistors (composition or film). While they look similar, the material of the resistive layer is the deciding factor. Another error involves HS code 8533.31, which is for wirewound fixed resistors under 20W. Wirewound resistors use a metal wire wrapped around a core, whereas metal film resistors use a deposited layer. Finally, if the resistor exceeds 20W in power handling, it must be moved to HS code 8533.29.

FAQ

What is the HS code for Metal film resistors?

The HS code for fixed metal film resistors with a power capacity of 20W or less is 8533.21.

Are variable metal film resistors covered here?

No, variable resistors (potentiometers or rheostats) are classified under subheadings 8533.40 or 8533.31/39, depending on their construction and power rating.