Your high-voltage circuit needs a transistor that actually holds at 250V without dropping out. The BF470 is a silicon PNP in a TO-126 package, rated for 100mA collector current and 1.8W dissipation. Hfe sits at 50 under a 25mA bias at 25°C. If you're rebuilding a power supply stage or swapping a tired transistor on a bench project, this is the part that slots in and stays there. Grab it while it's on the shelf
| brand | Jaycar |
| part_number | BF470 |
| type | PNP Transistor |
| package | TO-126 |
| material | Silicon |
| voltage_rating | 250V (Vcb) |
| current_rating | 100mA (Ic) |
| power_dissipation | 1.8W |
| hfe | 50 |
| bias_current | 25mA |
| test_temperature | 25°C |