This product is not recommended for design-in.
The recommended type is: BLF989S

UHF power LDMOS transistor

A 600 W LDMOS RF power transistor for broadcast transmitter applications and industrial applications. The excellent ruggedness of this device makes it ideal for digital and analog transmitter applications.


Whitepaper Doherty Architectures in UHF

This White Paper explains different PA architectures which can be used in today’s UHF Broadcast industry. 

In this paper a brief discussion will be given to explain these new Doherty architectures and to help customers finding the best solution for their transmitter. Ampleon’s transistor family BLF8XX can support these Doherty architectures.

Click here to download.

Features and benefits

  • Excellent ruggedness (VSWR ≥ 40 : 1 through all phases)
  • Optimum thermal behavior and reliability, Rth(j-c) = 0.15 K/W
  • Suitable for CW UHF and ISM applications
  • High power gain
  • High efficiency
  • Designed for broadband operation (470 MHz to 860 MHz)
  • Internal input matching for high gain and optimum broadband operation
  • Excellent reliability
  • Easy power control
  • Compliant to Restriction of Hazardous Substances (RoHS) Directive 2002/95/EC


  • Communication transmitter applications in the UHF band
  • Industrial applications in the UHF band


All application notes
All models
All documentation

All documents

Design tool

RF Power Lifetime Calculator


UHF power LDMOS transistor



Symbol Parameter Conditions Min Typ/Nom Max Unit
frange frequency range 470 860 MHz
PL(1dB) nominal output power at 1 dB gain compression 600 W
Test signal: DVB-T (8k OFDM)
Gp power gain VDS = 50 V; f = 858 MHz 20 dB
ηD drain efficiency VDS = 50 V; f = 858 MHz; IDq = 1.3 A 31 %
PL(AV) average output power VDS = 50 V; f = 858 MHz 120 W
IMDshldr intermodulation distortion shoulder attenuation f = 858 MHz [0] -31 dBc
PAR peak-to-average ratio f = 858 MHz [1] 7.8 dB

Package / Packing

All type numbers in the table below are not recommended for design-in.

Type number Package Outline version Reflow-/Wave
Packing Product status Marking Orderable part number,
(Ordering code (12NC))
sot539b_po Bulk Pack Active Standard Marking BLF888AS,112
(9340 645 76112)

Pinning info

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


All type numbers in the table below are not recommended for design-in.

Type number Orderable part number Chemical content RoHS / RHF Leadfree conversion date MSL MSL LF
BLF888AS BLF888AS,112 BLF888AS Always Pb-free 1 1
Quality and reliability disclaimer

Ordering & availability

Type number Ordering code (12NC) Orderable part number Distributor Buy online Samples
BLF888AS 9340 645 76112 BLF888AS,112 RFMW Buy Not available
DigiKey Buy

Design support

Title Type Date
PCB Design BLF888A(S) (AN11062, Data sheet) Design support 2012-04-23
PCB Design R_10032 Design support 2012-08-16
PCB Design BLF888A(S) (AN11325) Design support 2013-11-22
BLF888A ADS-2016 Simulation model 2017-04-14