8541: Diodes, transistors, semi-conductors, etc

854110: Diodes, except photosensitive and light emitting 854121: Transistors, except photosensitive, < 1 watt 854129: Transistors, except photosensitive, > 1 watt 854130: Thyristors/diacs/triacs, except photosensitive device 854140: Photosensitive/photovoltaic/LED semiconductor devices 854150: Semiconductor devices, not light sensitive or emittin 854160: Mounted piezo-electric crystals 854190: Parts of semiconductor devices and similar devices 8541: Diodes, transistors, semi-conductors, etc