HF / VHF power LDMOS transistor

A 20 W LDMOS RF transistor for broadcast applications and industrial applications in the HF and VHF band.

Features and benefits

  • Easy power control
  • Integrated ESD protection
  • Excellent ruggedness
  • High efficiency
  • Excellent thermal stability
  • Designed for broadband operation (10 MHz to 500 MHz)
  • Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances


  • Broadcast transmitter applications in the HF and VHF band
  • Industrial, scientific and medical applications


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Design tool

RF Power Lifetime Calculator


HF / VHF power LDMOS transistor



Symbol Parameter Conditions Min Typ/Nom Max Unit
frange frequency range 10 500 MHz
PL(1dB) nominal output power at 1 dB gain compression 20 W
Test signal: CW
Gp power gain PL = 20 W; VDS = 50 V; IDq = 50 mA 25.5 27.5 29.5 dB
RLin input return loss PL = 20 W; VDS = 50 V; IDq = 50 mA -13 -10 dB
ηD drain efficiency PL = 20 W; VDS = 50 V; f = 225 MHz; IDq = 50 mA 67 70 %
PL output power 20 W

Package / Packing

Type number Package Outline version Reflow-/Wave
Packing Product status Marking Orderable part number,
(Ordering code (12NC))
BLF571 SOT467C
sot467c_po Bulk Pack Active Standard Marking BLF571,112
(9340 614 06112)

Pinning info

Pin Symbol Description Simplified outline Graphic symbol
1 D drain
2 G gate
3 S souce


Type number Orderable part number Chemical content RoHS / RHF Leadfree conversion date MSL MSL LF
BLF571 BLF571,112 BLF571 Always Pb-free 1 1
Quality and reliability disclaimer

Ordering & availability

Type number Ordering code (12NC) Orderable part number Distributor Buy online Samples
BLF571 9340 614 06112 BLF571,112 DigiKey Buy Request samples

Design support

Title Type Date
PCB Design BLF571 (Data sheet) Design support 2012-02-24
BLF571 ADS-2016 Simulation model 2017-01-16
Ampleon Model Library for Microwave Office® Simulation model 2018-11-05
Ampleon Model Library Manual for Microwave Office® Simulation model 2018-11-05
Ampleon Simulation Example for Microwave Office® Simulation model 2018-11-05