Catalog > Semiconductors > Discrete Semiconductors > Transistors BF509 Bipolar Junction Transistor SI-P 40V 30mA 0.3W 750MHz Part No: BF509 Call for Price (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Additional Information Polarity PNP Material Silicon Power Dissipation 0.3A