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| Part Number | BF421-AP | BF421-BP | BF423-AP | BF420-AP |
|---|---|---|---|---|
| Manufacturer | STMicroelectronics | Micro Commercial Co | Micro Commercial Co | STMicroelectronics |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete |
| Transistor Type | PNP | PNP | PNP | NPN |
| Current - Collector (Ic) (Max) | 500 mA | 100 mA | 100 mA | 500 mA |
| Voltage - Collector Emitter Breakdown (Max) | 300 V | 300 V | 250 V | 300 V |
| Vce Saturation (Max) @ Ib, Ic | 600mV @ 5mA, 30mA | 600mV @ 5mA, 30mA | 600mV @ 5mA, 30mA | 600mV @ 5mA, 30mA |
| Current - Collector Cutoff (Max) | 10nA (ICBO) | 10nA (ICBO) | 10nA (ICBO) | 10nA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 50 @ 25mA, 20V | 50 @ 25mA, 20V | 50 @ 25mA, 20V | 50 @ 25mA, 20V |
| Power - Max | 830 mW | 830 mW | 830 mW | 830 mW |
| Frequency - Transition | 60MHz | 60MHz | 60MHz | 60MHz |
| Operating Temperature | 150°C (TJ) | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | TO-226-3, TO-92-3 (TO-226AA) Formed Leads | TO-226-3, TO-92-3 (TO-226AA) | TO-226-3, TO-92-3 (TO-226AA) Formed Leads | TO-226-3, TO-92-3 (TO-226AA) Formed Leads |
| Supplier Device Package | TO-92-3 | TO-92 | TO-92 | TO-92-3 |
