Protective Relay Signal Processing Board from Japan
High-speed PCB assembly for protective relays in power distribution systems of heading 8536, containing ADCs, DSP chips, and trip logic circuits. It analyzes fault currents and initiates protective actions. Classified in 8538.90.3000 as a part solely for heading 8536 apparatus.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include IEEE C37.90 compliance testing and relay model compatibility data
• Specify current/voltage input ranges matching standard protective relay specifications
• Document that board requires relay enclosure and power supply to operate