PHILIPS BLF521 Data Sheet
Summary
This datasheet provides complete specifications for the Philips BLF521 UHF power MOS transistor, an N-channel enhancement mode vertical D-MOS device in a 4-lead SOT172D studless ceramic package. It details RF performance at 500MHz, class-B operation characteristics, thermal ratings, and application notes for communications transmitter designs in the UHF frequency range.
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DISCRETE SEMICONDUCTORS
DATA SHEET
BLF521 UHF power MOS transistor
Product specification November 1992
Page Summary Contents For PHILIPS BLF521 Data Sheet
Manual Details
| Brand | Philips |
|---|---|
| Pages | 14 |
| File Size | 94.46 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
What is the designed operating frequency range for this transistor?
It is specifically designed for communications transmitter applications in the UHF frequency range.
How must I handle or dispose of the BLF521 unit?
Due to its content (beryllium oxide), it must be handled with caution and disposed of as chemical or special waste, never with general household trash.
What are the maximum permitted operating voltages for the device?
The maximum absolute drain-source voltage is -40V, and the gate-source voltage limit is also established at -20V.
What precautions must be taken during handling or installation?
The gate-source input must be protected against static charge during transport and handling. It also has leads isolated from the mounting base.