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February 2018 – IXYS 850V Ultra-Junction X-class HiPerFET Power MOSFETs

Published on: 19/02/2018

Introducing IXYS’ range of 850V HiPerFET Power MOSFETs, the industry’s lowest on-resistance silicon devices

IXYS 850V Ultra-Junction X-class HipPerFET Power MOSFETs

The 850V Ultra-Junction X-Class Power MOSFETs with fast body diodes represent a new power semiconductor product line from IXYS Corporation.

Developed using the charge compensation principle and proprietary process technology, the new 850V devices exhibit the lowest on-state resistances (33 milliohms in the SOT-227 package and 41 milliohms in the PLUS264, for instance), along with low gate charges and superior dv/dt performance. Their avalanche capability also enhances the device ruggedness. In addition, thanks to the fast soft-recovery body diode, these ultra-Junction MOSFETs help reduce switching losses and electromagnetic interference (EMI).


IXYS’ range of 850V HiPerFET Power MOSFETs


  • Ultra low on-resistance RDS(ON) and gate charge
  • Fast body diode
  • Dv/dt ruggedness
  • Avalanche rated
  • Low package inductance
  • International standard packages



  • Higher efficiency
  • High power density
  • Easy to mount
  • Space savings



The IXYS 850V Ultra-Junction X-class HiPerFETs are often used in the following applications:

  • Industrial switched-mode and resonant-mode power supplies
  • Electric vehicle battery chargers
  • AC and DC motor drives
  • DC-DC converters
  • Renewable-energy inverters
  • Power factor correction (PFC) circuits
  • Robotics and servo control


The new 850V X-class Power MOSFETs with HiPerFET body diodes are available in the following international standard size packages: TO-220, TO-263HV, SOT-227, TO-247, TO-264, PLUS264, and TO-268HV. Some example part numbers include IXFH20N85X, IXFK50N85X, IXFB90N85X and IXFN110N85X, with current ratings of 20A, 50A, 90A and 110A.


View the IXYS 850V Ultra-Junction X-class HiPerFET Power MOSFET Product Brief.


GD Rectifiers is an official distributor for IXYS Corporation, IXYS ICD, IXYS RF and IXYS UK Westcode. They stock a wide range of semiconductor components by IXYS Corporation including: Solid State Power Relays, Gate Drivers, Optically Isolated AC Power Switches, Thyristors, Diodes, IGBTs, MOSFETs, Rectifier Bridges, AC Controlled Thyristors, Switchable Current Regulators, Thyristors Module Accessories, Fuses, Heatsinks, Power Assemblies, Capacitors and the complete IXYS RF range.


For further information on all IXYS products click here or call 01444243 452 / email


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