FDB33N25 − N-Channel UniFETTM MOSFET 250V, 33A, 94mΩ


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 FDB33N25TM Full Production
ROHS Compliant
$1.72  Details
4.445 x 10.16 x 15.24mm

Line 1:$Y (Fairchild logo)
&Z (Plant Code)
&3 (3-Digit Date Code)
Line 2:FDB
Line 3:33N25
RƟJA :  62.5  °C/W
RƟJC :  0.53  °C/W
Moisture Sensitivity Level (MSL) :  1  
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  • RDS(on) = 94mΩ ( Max.)@ VGS = 10V, ID = 16.5A
  • Low gate charge ( Typ. 36.8nC)
  • Low Crss ( Typ. 39pF)
  • 100% avalanche tested


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

Application Notes

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