Having a power handling capacity less than 40 VA
Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof: > Other transformers: > Having a power handling capacity not exceeding 1 kVA: > Other: > Having a power handling capacity less than 1 kVA > Having a power handling capacity less than 40 VA
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 8504.31.40.35
Sous Vide Immersion Circulator Transformer
30VA low-profile transformer for kitchen sous vide cooking appliances providing precise low-voltage control power. Classified HTS 8504.31.40.35 as appliance transformer under 40VA capacity.
24V Doorbell Transformer
Standard household doorbell transformer converting 120V AC to 24V AC with 30VA capacity, featuring screw terminals for easy installation. Classified under HTS 8504.31.40.35 due to its low power handling under 40VA and typical residential application. Includes built-in mounting bracket.
12V AC Wall Adapter Transformer
A compact step-down transformer rated at 15VA used to convert 120V AC mains voltage to 12V AC for powering low-voltage devices like doorbells or small appliances. It falls under HTS 8504.31.40.35 because it has a power handling capacity of less than 40VA and does not exceed 1kVA. Designed for household use with basic overcurrent protection.
5V USB Charger Transformer Module
Miniature AC-DC transformer module rated at 10VA with USB output port for charging small electronics like wireless earbuds or IoT sensors. Meets HTS 8504.31.40.35 criteria for transformers under 40VA, distinguished from full power supplies by lacking extensive regulation circuitry. Compact PCB-mount design.
Low Voltage Landscape Lighting Transformer
Weatherproof 20VA transformer for 12V AC landscape path lighting systems, with photocell dusk-to-dawn control. Falls under HTS 8504.31.40.35 as a low-power handling transformer under 40VA designed for outdoor residential decorative lighting applications.
Audio Equipment Step-Down Transformer
18VA toroidal transformer for powering tube preamplifiers and small audio components, providing clean isolated 12V AC power. Classified under HTS 8504.31.40.35 for its low power rating below 40VA and audio-specific design with minimal electromagnetic interference.
Toy Train Set Power Supply Transformer
25VA whistle-equipped transformer for Lionel-style O-gauge model train layouts, providing variable 14V AC output with throttle control. Meets HTS 8504.31.40.35 low-power transformer definition while excluding full power supplies with extensive electronics.
LED Strip Light Driver Transformer
15VA constant voltage transformer for 12V DC LED tape lighting after external rectification, featuring short-circuit protection. Classified HTS 8504.31.40.35 as low-power AC transformer excluding full LED drivers with integrated power electronics.
Medical Device Isolation Transformer
8VA medical-grade isolation transformer for patient monitoring equipment power supplies, providing galvanic isolation with low leakage current. Falls under HTS 8504.31.40.35 for low-power medical transformers meeting safety isolation standards.
Halogen Landscape Spotlight Transformer
35VA electronic transformer for 12V MR16 halogen garden spotlights with overload protection and weatherproof enclosure. HTS 8504.31.40.35 classification applies to low-power outdoor transformers without full power supply functionality.
RFID Reader Power Transformer
12VA surface-mount transformer for embedded RFID reader modules providing isolated 5V AC supply. Designed for low-power IoT applications and classified under HTS 8504.31.40.35 due to capacity under 40VA.
Christmas Light String Transformer
28VA weather-resistant transformer for LED holiday light displays with timer function and outlet protection. Meets HTS 8504.31.40.35 low-power specification for seasonal decorative transformers.
Valve Preamp Heater Transformer
20VA custom wound transformer for vacuum tube guitar amplifier heater circuits with center-tapped 6.3V filament winding. Audio-grade construction qualifies under HTS 8504.31.40.35 low-power transformer heading.
Wireless Doorbell Power Adapter
16VA plug-in transformer for battery-free wireless doorbell systems converting mains to 16V AC with surge protection. Standard residential design qualifies for HTS 8504.31.40.35 low-power classification.
Miniature Model Railroad Transformer
10VA precision transformer for Z-scale and N-scale model railroad layouts with smooth DC conversion throttle. Compact design for hobby benchtop operation classified under HTS 8504.31.40.35.