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150W - 50V High Ruggedness HF/VHF DMOS TRANSISTOR
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The SD4931 is an N-channel MOS field-effect RF power transistor. It is intended for use in 50 V DC large signal applications up to 250 MHz.

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Errata Sheet
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Key Features

  • Improved ruggedness V(BR)DSS > 200 V
  • Excellent thermal stability
  • 20:1 all phases load mismatch capability
  • POUT = 150 W min. with 14.8 dB gain @ 175 MHz
  • In compliance with the 2002/95/EC European directive

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS6147: HF/VHF/UHF RF power N-channel MOSFET
4.0 298 KB

Application Notes

Description Version Size
AN2027: Mounting recommendations for ceramic DMOS packages
2.4 48 KB

HW Model & CAD Libraries

HW Model & CAD Libraries

Description Version Size
SD4931 ADS model
1.0.0 403 KB

Presentations & Training Material


Description Version Size
SD49xx: The new DMOS series for RF plasma generators
1.0.0 1,161 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STSW-RFMOS002 Large signal load stability for RF transistors based on Agilnet ADS
STSW-RFMOS001 Mismatch analysis for RF transistor circuits based on Agilent ADS

Publications and Collaterals


Description Version Size
SD49xx: 50 V RF MOSFETs for ISM applications
1.0.0 286 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
SD4931ActiveM174Loose Piece_-43.65Distributor reported inventory date: 2015-08-28
Distributor NameRegionStockMin. order

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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