HF / VHF power LDMOS transistor

A 500 W to 600 W LDMOS power transistor for broadcast applications and industrial applications in the HF to 500 MHz 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
  • 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 600 W
Test signal: CW
Gp power gain PL = 400 W; VDS = 50 V 25 26.5 28 dB
RLin input return loss VDS = 50 V -20 -13 dB
ηD drain efficiency PL = 400 W; VDS = 50 V; f = 225 MHz; IDq = 1000 mA 66 70 %
PL output power 500 W

Package / Packing

Type number Package Outline version Reflow-/Wave
Packing Product status Marking Orderable part number,
(Ordering code (12NC))
BLF574 SOT539A
sot539a_po Bulk Pack Active Standard Marking BLF574,112
(9340 619 65112)

Pinning info

Pin Symbol Description Simplified outline Graphic symbol
1 D1 drain1
2 D2 drain2
3 G1 gate1
4 G2 gate2
5 S source


Type number Orderable part number Chemical content RoHS / RHF Leadfree conversion date MSL MSL LF
BLF574 BLF574,112 BLF574 Always Pb-free 1 1
Quality and reliability disclaimer

Ordering & availability

Type number Ordering code (12NC) Orderable part number Distributor Buy online Samples
BLF574 9340 619 65112 BLF574,112 RFMW Buy Request samples
DigiKey Buy

Design support

Title Type Date
PCB Design R_10032 Design support 2012-08-16
PCB Design BLF574 (AN10714) Design support 2012-02-24
PCB Design BLF574 (Data sheet) Design support 2012-02-24
BLF574 ADS-2016 Simulation model 2017-01-04
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