TLP521 Optocoupler from Germany
The TLP521 is a photosensitive semiconductor optocoupler consisting of a gallium arsenide infrared LED optically coupled to a phototransistor, providing electrical isolation up to 2.5kV. It falls under HTS 8541.49.80.00 as an optical coupled isolator used in power supplies and motor drives to transmit signals while preventing high voltage feedback. This device ensures reliable galvanic isolation in industrial control circuits.
Duty Rate — Germany → United States
Rate breakdown
Import Tips
• Verify isolation voltage rating (e.g
• 2.5kV) and CTR (current transfer ratio) specifications match datasheet to confirm classification as optical coupled isolator under 8541.49.80
• Include manufacturer datasheets showing LED-phototransistor optical coupling in commercial invoice; declare as 'photosensitive semiconductor device' not general diode
• Avoid misclassification as LED assemblies by confirming single-channel isolator function; check for RoHS compliance documentation required for electronics imports