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Electrical resistors (including rheostats and potentiometers), other than heating resistors. > Wirewound variable resistors, including rheostats and potentiometers: > Parts > Other > Other
Duty Rate (from China)
Subheadings
Products classified under Tariff item 8533.90
Bimetallic Temperature Reactive Strip
A bimetallic temperature reactive strip, composed of two bonded metals with different thermal expansion coefficients, that bends mechanically in response to temperature changes. This strip is designed as a component for wirewound variable resistors (including rheostats and potentiometers) of tariff item 8533.40.00, where its temperature-sensitive mechanical action adjusts resistance. Its metallic construction and thermal reactivity qualify it under this tariff item for parts of ceramic or metallic materials.
8533.90.10Ceramic PTC Thermistor Element
A ceramic PTC thermistor element made of positive temperature coefficient ceramic material that sharply increases resistance at a threshold temperature, providing self-regulating heating or overcurrent protection. This element is electrically reactive to temperature changes and is intended as a component for wirewound variable resistors of tariff item 8533.40.00. Its ceramic construction and thermal electrical reactivity qualify it under this tariff item.
8533.90.10High-Temperature Ceramic RTD Foil
A high-temperature ceramic RTD foil, consisting of a platinum foil element on a ceramic substrate, that provides precise resistance changes with temperature up to 1000°C. This foil is electrically reactive to temperature and is designed for use in wirewound variable resistors of tariff item 8533.40.00, particularly in high-temperature sensing applications. Its ceramic material and thermal electrical reactivity qualify it under this tariff item.
8533.90.10Invar-Nickel Bimetal Cantilever Strip
An invar-nickel bimetallic cantilever strip engineered for controlled deflection rates with temperature changes, providing mechanical reactivity for thermal compensation in variable resistors. This strip is designed for use in wirewound variable resistors of tariff item 8533.40.00, where its bending action adjusts resistance. Its metallic construction and mechanical thermal reactivity qualify it under this tariff item.
8533.90.10Metallic Thermal Cutout Disc
A metallic thermal cutout disc, made of bimetallic material, designed to snap-action open a circuit at a predetermined temperature for thermal protection. This disc is mechanically reactive to temperature and is intended for use in wirewound variable resistors of tariff item 8533.40.00, where it acts as a thermal safety component. Its metallic construction and mechanical thermal reactivity qualify it under this tariff item.
8533.90.10NTC Thermistor Ceramic Disc
An NTC thermistor ceramic disc, made from ceramic metal oxide materials, that decreases resistance with increasing temperature, providing electrically reactive temperature sensing. This disc is designed for use in wirewound variable resistors of tariff item 8533.40.00, where its resistance-temperature relationship adjusts circuit behavior. Its ceramic construction and electrical thermal reactivity qualify it under this tariff item.
8533.90.10Platinum Thin-Film RTD Chip
A platinum thin-film RTD chip on a ceramic substrate, which changes electrical resistance precisely with temperature for high-accuracy sensing applications. This chip is electrically reactive to temperature and is designed for use in wirewound variable resistors of tariff item 8533.40.00, particularly in precision instrumentation. Its ceramic material and thermal electrical reactivity qualify it under this tariff item.
8533.90.10PT100 RTD Temperature Sensor Element
A PT100 RTD temperature sensor element, consisting of a ceramic substrate with a thin-film platinum resistive track, that changes resistance linearly with temperature for accurate sensing. This element is electrically reactive to temperature and is designed for use in wirewound variable resistors of tariff item 8533.40.00, where it provides precise temperature compensation. Its ceramic construction and thermal electrical reactivity qualify it under this tariff item.
8533.90.10SMD NTC Thermistor Chip
An SMD NTC thermistor chip on a ceramic base, electrically reactive with a negative temperature coefficient for compact circuit protection and temperature sensing. This chip is designed for use in wirewound variable resistors of tariff item 8533.40.00, where its resistance-temperature behavior adjusts circuit performance. Its ceramic construction and electrical thermal reactivity qualify it under this tariff item.
8533.90.10Thermocouple Compensation Alloy Resistor
A thermocouple compensation alloy resistor strip, made of metallic alloy, designed to match thermocouple reference junction temperature characteristics and electrically reactive to maintain measurement accuracy. This strip is intended for use in wirewound variable resistors of tariff item 8533.40.00, where it provides temperature compensation. Its metallic construction and electrical thermal reactivity qualify it under this tariff item.
8533.90.90Foil Resistor Chip Element 2512 Size
A bulk metal foil resistive element in a 2512 chip format designed for high-current precision applications in servers and test equipment. It features an ultra-low temperature coefficient of resistance (TCR) for stability under load variation. This component is a part of a resistor, not a complete resistor, and is not made of ceramic or metallic materials that are electrically or mechanically reactive to temperature changes, thus falling under 'Other' parts.
8533.90.90Metal Film Precision Resistor Network SIP-10
A single in-line package (SIP) resistor network containing 10 metal film elements for high-precision applications in instrumentation and automotive ECUs. It provides multiple fixed resistances in one compact part. This is a part of a resistor, not a complete resistor, and does not consist of temperature-reactive ceramic or metallic materials, so it falls under 'Other' parts.
8533.90.90NTC Thermistor Bead Assembly
A negative temperature coefficient (NTC) thermistor bead with leads for temperature sensing in HVAC systems and battery management. It consists of a glass-encapsulated ceramic bead. This is a part of a resistor, but since it is not made of ceramic or metallic materials that are electrically or mechanically reactive to temperature changes for the specific goods of tariff item 8533.40.00, it falls under 'Other' parts.
8533.90.90Power Resistor Aluminum Housed Substrate
An aluminum substrate base for chassis-mount power resistors used in power supplies and amplifiers. It provides excellent heat sinking capability and has an anodized surface for electrical insulation. This is a part of a resistor, not a complete resistor, and is not made of temperature-reactive ceramic or metallic materials, so it falls under 'Other' parts.
8533.90.90Rheostat Ceramic Core Replacement Part
A high-temperature ceramic core component for industrial rheostats used in motor speed controls and laboratory equipment. It is designed to withstand high power dissipation. This is a part of a variable resistor, but it is not made of ceramic or metallic materials that are electrically or mechanically reactive to temperature changes for the specific goods of tariff item 8533.40.00, so it falls under 'Other' parts.
8533.90.90SMT Thin Film Resistor Bare Die
An unpackaged thin film resistor die for hybrid circuit assembly in aerospace and medical devices. It offers ultra-precise resistance values with minimal parasitics and is deposited on a silicon substrate. This is a part of a resistor, not a complete resistor, and is not made of temperature-reactive ceramic or metallic materials, so it falls under 'Other' parts.
8533.90.90Thick Film Chip Resistor SMD 0805
Surface-mount thick film chip resistors in 0805 size (2.0 x 1.25 mm) used for current limiting and voltage division in consumer electronics like smartphones and laptops. These are precision parts, but when imported as individual components, they are parts of resistors. They are not made of temperature-reactive ceramic or metallic materials for the specific goods of tariff item 8533.40.00, so they fall under 'Other' parts.
8533.90.90Trimmer Potentiometer Ceramic Substrate
A ceramic substrate with cermet film for surface-mount trimmer potentiometers in telecommunications equipment. It allows fine resistance adjustment post-assembly and uses multi-layer thick film construction. This is a part of a variable resistor, but it is not made of ceramic or metallic materials that are electrically or mechanically reactive to temperature changes for the specific goods of tariff item 8533.40.00, so it falls under 'Other' parts.
8533.90.90Variable Resistor Carbon Disc Element
A carbon disc resistive element for slide and rotary variable resistors in consumer appliances like washing machines and dimmer switches. It provides smooth linear resistance change and is molded from carbon. This is a part of a variable resistor, but it is not made of ceramic or metallic materials that are electrically or mechanically reactive to temperature changes for the specific goods of tariff item 8533.40.00, so it falls under 'Other' parts.
8533.90.90Wirewound Potentiometer Carbon Track Element
A carbon track resistive element for wirewound potentiometers used in volume controls and tuning circuits of audio equipment. This part provides variable resistance adjustment and is classified as 'other' parts. It is not made of temperature-reactive ceramic or metallic materials for the specific goods of tariff item 8533.40.00, so it falls under 'Other' parts.