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SITCSection 7
U.S. imports of variable electrical resistors, not elsewhere specified (rheostats & potentiometers) (SITC 77235) totaled $33.6M in April 2026, traded with 52 countries.
Importers of Variable Electrical Resistors, Not Elsewhere Specified (Rheostats & Potentiometers) paid $3.4M in duties in April 2026 — an effective duty rate of 15% on $22.1M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataNon-wirewound variable resistors — including carbon-track, conductive-plastic, and cermet potentiometers, as well as trimmer potentiometers used for circuit calibration — occupy this residual NES heading. Conductive-plastic types dominate in applications demanding long rotational life and low noise, such as precision servo systems and medical instrumentation, while cermet trimmers are ubiquitous on PCBs for one-time calibration adjustments. The NES designation means the heading is a catch-all, so the corresponding HTS classification requires careful review of the resistive element material and mechanical configuration. Section 301 tariffs on Chinese-origin electronic components affect a broad range of these products.
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Both fall under this NES variable resistor heading, but the resistive element material — cermet (a ceramic-metal composite) versus conductive plastic — affects the product's performance profile and may influence the specific HTS 10-digit line. Cermet trimmers are typically single-turn, panel-mount or PCB-mount calibration devices, while conductive-plastic types are used in continuous-rotation, high-cycle applications. Invoices and datasheets should specify the element type.
Digital potentiometers — integrated circuits that simulate a variable resistor under digital control — are generally classified as integrated circuits rather than as variable resistors, and would not fall under this SITC heading. Only mechanically adjustable variable resistors with non-wirewound elements belong here. Importers of digitally controlled resistance devices should verify their HTS classification separately.
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Monthly import values over time