| BF421 |  | General Semiconductor | Small Signal Transistors (PNP) | Original | PDF | 38.9KB | 2 | 
| BF421 |  | Korea Electronics | High Voltage Transistor | Original | PDF | 42.9KB | 3 | 
| BF421 |  | Motorola | High Voltage Transistors(PNP) | Original | PDF | 121.85KB | 4 | 
| BF421 |  | NXP Semiconductors | PNP high voltage transistors - Complement: BF420 ; fT min: 60 MHz; hFE max:>50 ; hFE min: 50 ; IC max: 50 mA; Polarity: PNP ; Ptot max: 830 mW; VCEO max: 300 V | Original | PDF | 46.4KB | 6 | 
| BF421 |  | On Semiconductor | High Voltage Transistor PNP | Original | PDF | 53.33KB | 4 | 
| BF421 |  | Philips Semiconductors | Rectifier diodes schottky barrier | Original | PDF | 29.83KB | 5 | 
| BF421 |  | Philips Semiconductors | Small-signal Transistors | Original | PDF | 4.4KB | 1 | 
| BF421 |  | Philips Semiconductors | PNP High-Voltage Transistor | Original | PDF | 46.57KB | 8 | 
| BF421 |  | Siemens | RF-Transistors, MMICs, RF-Diodes, AF-Diodes, AF-Schottky Diodes and RF-Schottky Diodes Guide | Original | PDF | 465.63KB | 37 | 
| BF421 |  | Siemens | Transistor / Diode Selection Guide | Original | PDF | 27.22KB | 3 | 
| BF421 |  | Siemens | Cross Reference Guide 1998 | Original | PDF | 27.35KB | 7 | 
| BF421 |  | Siemens | NPN Silicon Transistors With High Reverse Voltage | Original | PDF | 138.65KB | 4 | 
| BF421 |  | Siemens | PNP Silicon Transistors (High breakdown voltage Low collector-emitter saturation voltage) | Original | PDF | 127.16KB | 4 | 
| BF421 |  | STMicroelectronics | SMALL SIGNAL PNP TRANSISTOR | Original | PDF | 36.85KB | 4 | 
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| BF421 |  | STMicroelectronics | SMALL SIGNAL PNP TRANSISTOR | Original | PDF | 59.72KB | 5 | 
| BF421 |  | Transys Electronics | PNP SILICON PLANAR EPITAXIAL HIGH VOLTAGE VIDEO TRANSISTORS | Original | PDF | 83.55KB | 3 | 
| BF421 |  | Various Russian Datasheets | Transistor | Original | PDF | 84.39KB | 8 | 
| BF421 |  | Continental Device India | Semiconductor Device Data Book 1996 | Scan | PDF | 99.56KB | 1 | 
| BF421 |  | Continental Device India | TO-92 PNP Plastic Package Transistors | Scan | PDF | 241.26KB | 2 | 
| BF421 |  | Korea Electronics | SILICON PNP TRIPLE DIFFUSED TYPE | Scan | PDF | 392.29KB | 3 |