Ultra Junction X-Class Series - 800V Automotive Qualified Ultra Junction X-Class Power MOSFETs

Littelfuse Discrete MOSFETs Ultra Junction X-Class Image
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

These devices are developed using a charge compensation principle and proprietary process technology, resulting in Power MOSFETs with significantly reduced resistance RDS(on) and gate charge Qg. A low on-state resistance reduces the conduction losses; it also lowers the energy stored in the output capacitance, minimizing the switching losses. A low gate charge results in higher efficiency at light loads as well as lower gate drive requirements. In addition, these MOSFETs are avalanche rated and exhibit a superior dv/dt performance. Also due to the positive temperature coefficient of their on-state resistance, they can be operated in parallel to meet higher current requirements.


  • International Standard Package
  • High Voltage Package
  • Low RDS(ON) and QG
  • Avalanche Rated
  • Low Package Inductance


  • High Power Density
  • Easy to Mount
  • Space Savings


  • Switch-Mode and Resonant-Mode Power Supplies
  • DC-DC Converters
  • PFC Circuits
  • AC and DC Motor Drives
  • Robotics and Servo Controls

Access specifications, certifications, check availability and order parts below

Catalog #VDSS (V)RDS(ON),max @ 25 ℃ (Ohm)ID, cont @ 25 ℃ (A)Gate Charge (nC)RthJC (K/W)ConfigurationPackage TypeCISS (pF)trr,typ (ns)PD (W)Part DatasheetPartner ECAD ModelsCompare
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