4N25 General Purpose Optocoupler from China
4N25 is a versatile optical isolator with GaAs infrared LED coupled to phototransistor in 6-pin DIP, offering 2.5kV isolation. Falls under HTS 8541.49.80.00 for general purpose interface isolation in computers, printers, and instrumentation. Base-emitter pin enables high-speed switching applications.
Duty Rate — China → United States
50%
Rate breakdown
9903.91.0550%Effective with respect to entries on or after January 1, 2025, articles the product of China, as provided for in subdivision (f) of U.S. note 31 to this subchapter
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• 6-pin DIP vs 4-pin DIP distinction important; provide pinout diagrams showing base connection
• Isolation test voltage certification (2500Vrms) required for customs verification
• Avoid declaring as 'transistor' only; specify complete optical coupling function