FDPF18N50 − N-Channel UniFETTM MOSFET 500V, 18A, 265mΩ


UniFETTM MOSFET is Fairchild Semiconductor’s high voltage MOSFET family based on planar stripe and DMOS technology. This MOSFET is tailored to reduce on-state resistance, and to provide better switching performance and higher avalanche energy strength. This device family is suitable for switching power converter applications such as power factor correction (PFC), flat panel display (FPD) TV power, ATX and electronic lamp ballasts.

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Product Status/Pricing/Packaging

Product Product & Eco Status *Pricing Packaging & Packing Info **Package Marking Convention Qualification Support Compliance Certificates
0 FDPF18N50 Full Production
ROHS Compliant
$2.25  Details
4.7 x 10.06 x 15.87mm

Line 1:$Y (Fairchild logo)
&Z (Plant Code)
&3 (3-Digit Date Code)
Line 2:FDPF
Line 3:18N50
RƟJA :  62.5  °C/W
RƟJC :  3.3  °C/W


  • RDS(on) = 265mΩ ( Max.)@ VGS = 10V, ID = 9A
  • Low gate charge ( Typ. 45nC)
  • Low Crss ( Typ. 25pF)
  • 100% avalanche tested


  • AC-DC Merchant Power Supply
  • Consumer Appliances
  • DC-DC Merchant Power Supply
  • DVD/Set Top Boxes
  • EMS
  • LCD Monitor
  • LED TV
  • Notebook PC
  • LCD TV
  • PDP TV
  • Lighting
  • Desktop PC
  • PC Server
  • Uninterruptible Power Supply

Application Notes

Application Note Description
AN-8026 FAN9611 / FAN9612 400W 1-Layer Evaluation Board User Guide (FEB301)(1,972 K) 28-Jun-2014
AN-7515 A Combined Single-Pulse and Repetitive UIS Rating System(556 K) 03-Mar-2011
AN-9010 MOSFET Basics(990 K) 09-Sep-2013
AN-558 Introduction to Power MOSFETs and their Applications(244 K) 28-Jun-2014
AN-4163 Shielded Gate PowerTrench® MOSFET Datasheet Explanation(1,525 K) 28-Jun-2014
AN-7510 A New PSPICE Subcircuit for the Power MOSFET Featuring Global Temperature Options(222 K) 05-Mar-2011
AN-9005 Driving and Layout Design for Fast Switching Super-Junction MOSFETs(1,778 K) 28-Jun-2014
AN-9034 Power MOSFET Avalanche Guideline(381 K) 05-Mar-2011
AN-7533 A Revised MOSFET Model With Dynamic Temperature Compensation(132 K) 05-Mar-2011
AN-9065 FRFET® in Synchronous Rectification(156 K) 28-Jun-2014
AN-8018 FAN9612 400W 4-Layer Evaluation Board User Guide (FEB279) OBSOLETE! FEB279 Replaced by FEB388(3,006 K) 27-Sep-2013
AN-9717 FAN9611/12 400W Interleaved Dual BCM PFC Evaluation Board User Guide (FEB388)(5,934 K) 20-May-2013
AN-8027 FAN480X PFC+PWM Combination Controller Application(863 K) 28-Jun-2014
AN-6982 Power Factor Correction Converter Design with FAN6982(693 K) 03-Mar-2011
AN-6086 Design Consideration for Interleaved Boundary Conduction Mode PFC Using FAN9611 / FAN9612(775 K) 05-Mar-2011
AN-9066 UniFET™ Optimized Switch for Discontinuous Current Mode Power Factor Correction(440 K) 03-Mar-2011
AN-9725 Robust Body Diode Characteristics of the Latest Power MOSFETs, UniFET™ II for Resonant Converters(871 K) 28-Jun-2014

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