| Manufacturer | Part Number | Description |
|---|---|---|
NXP Semiconductors
| BF550 | PNP medium frequency transistor |
| Jingdao Microelectronics | P6SMBF550A | Surface mount transient voltage suppressor power 600 watts |
TEMIC Semiconductors (now Microchip)
| BF550R | Silicon PNP HF Transistor |
Siemens Semiconductor Group (now Infineon)
| BF550 | PNP Silicon RF Transistor |
Kexin Semiconductor
| BF550 | PNP Medium Frequency Transistor |
|
TEMIC Semiconductors (now Microchip)
| BF550 | Silicon PNP HF Transistor |
