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HSChapter 85
U.S. exports of variable resistors, rheostats & potentiometers (not elsewhere specified) (HS 853340) totaled $49.2M in July 2026.
Importers of Variable Resistors, Rheostats & Potentiometers (Not Elsewhere Specified) paid $3.9M in duties in July 2026 — an effective duty rate of 17% on $23.0M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataNon-wirewound variable resistors — including cermet potentiometers, metal-glaze types, metal oxide varistors (MOVs), and rheostat-type motor starters — are classified here when they do not fall under the wirewound or carbon-film headings. Metal oxide varistors (8533404000) are a commercially significant subset, widely used as transient voltage suppressors in power supplies, surge protectors, and motor drives. Mexico and Japan are leading suppliers, with China also a major source subject to potential Section 301 tariff exposure.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
3.7K shipments/mo
Yes. MOVs have a dedicated 10-digit line (8533404000) within heading 853340, separate from cermet potentiometers (8533408050), metal-glaze potentiometers (8533408060), rheostat-type motor starters (8533408040), and the residual variable resistor line (8533408070). MOVs function as voltage-dependent resistors rather than manually adjustable devices, but they remain classified within this heading rather than as discrete semiconductor devices.
Rheostat and resistor-type motor starters and controllers are specifically provided for at 8533408040 within this heading. If the motor starter uses a different switching technology (e.g., contactors, solid-state drives), it would likely fall outside heading 8533 entirely and require classification under the appropriate switchgear or power electronics heading.
Subheading 2 of 7 in heading 8533
Subheading 853340 · $36.1M of $92.0M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8533408070 | Variable Resistors, NESOI | $29.5M | 9.63% | 63.13% | $2.8M |
| 8533404000 | Metal Oxide Varistors | $3.8M | 20.90% | 82.30% | $787K |
| 8533408050 | Variable Resistors/ Potentiometers Cermet, NESOI | $1.6M | 9.64% | 47.43% | $154K |
| 8533408040 | Rheostat & Resistor Type Motor Starters/Controlers | $1.3M | 6.57% | 43.91% | $86K |
| 8533408060 | Variable Resistors/Potentiometers, Metal Glaze | $0 | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8533400080 | Variable Resistors, Including Potentiometers,NESOI | $47.8M |
| 8533400040 | Rheostat & Resistor Type Motor Starters/Controlers | $1.4M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$36.1MYoY · Pro
Exports
$49.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Mexico and Canada together take 67% of it.
customs district
origin
entry
rate provision · imports
27.8% enters free of duty; the effective duty rate is 10.70%.