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 DigiKey Buy Request samples

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