Catalog > Semiconductors > Discrete Semiconductors > Transistors BC639 Bipolar Junction Transistor SI-N 80V 1A 0.8W 100MHz Part No: BC639 0.90 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Additional Information Polarity NPN Material Silicon Power Dissipation 0.8A