High voltage, high speed planar passivated NPN power switching transistor in a SOT 78 (TO-220AB) plastic package intended for use in high frequency electronic lighting ballast applications, converters, inverters, switching regulators, motor control systems, etc.

Features and Benefits
  • Fast switching
  • Low thermal resistance
  • Very high voltage capability
  • Very low switching and conduction losses
  • DC-to-DC converters
  • High frequency electronic lighting ballasts
  • Inverters
  • Motor control system
  • Switching regulators
IC [max]
Package version
Package name
Product status
Product Parametric
Type Number Symbol Parameter Conditions Min Typ/Nom Max Unit
BUJ303B VCESM collector-emitter peak voltage VBE = 0 V     1050 V
IC collector current       5 A
hFE DC current gain IC = 3 A; VCE = 1.5 V   10.5    
tf fall time IC = 2.5 A; IBon = 0.5 A; VBB = -5 V; LB = 1 µH; inductive load   200   ns
Type number Package Packing Product status Marking Orderable part number Ordering code (12NC)
Horizontal, Rail Pack Volume production Standard Marking BUJ303B,127 9340 570 75127
Quality, reliability & chemical content
Chemical content Orderable part number Type number RoHS / RHF Leadfree conversion date MSL MSL LF
BUJ303B BUJ303B,127   BUJ303B LeadedE   NA NA
Ordering & availability
Type number Ordering code (12NC) Orderable part number Region Distributor Order sample
BUJ303B 9340 570 75127 BUJ303B,127 NA NA  
VCESM [max]
Orderable part number

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