DARLINGTON Phototransistor Dual Element from China
High current gain darlington connected phototransistor pair providing 10,000+ gain for low light level detection in smoke detectors and medical instruments. Falls under HTS 8541.49.70 as photosensitive transistor configuration.
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
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Specify darlington configuration in documentation; still classifies as phototransistor not two separate devices
• Include smoke detector UL certification if applicable for end-use verification
• Avoid GRI 3(a) set classification; functions as single photosensitive transistor unit