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BUL128D(NPN)
TO-220 Transistor

TO-220
1.BASE

2.COLLECTOR

3.EMITTER

3
2
1
Features
ELECTRONIC BALLASTS FOR FLUORESCENT LIGHTING
FLYBACK AND FORWARD SINGLE TRANSISTOR LOW POWER
CONVERTERS
MAXIMUM RATINGS (TA=25 unless otherwise noted)
Symbol Parameter Value Units
VCBO Collector-Base Voltage 700 V
Dimensions in inches and (millimeters)
VCEO Collector-Emitter Voltage 400 V
VEBO Emitter-Base Voltage 9 V
IC Collector Current -Continuous 4 A
PC Collector Power Dissipation 2 W
Rthj-case Thermal Resistance Junction-Case Max 1.78 /W
Rthj-amb Thermal Resistance Junction-Ambient Max 62.5 /W
Tj Junction Temperature 150
Tstg Storage Temperature Range -55-150

ELECTRICAL CHARACTERISTICS (Tamb=25 unless otherwise specified)
Parameter Symbol Test conditions MIN TYP MAX UNIT

Collector-base breakdown voltage V(BR)CBO IC= 1mA,IE=0 700 V
Collector-emitter Sustaining voltage VCEO(SUS) IC= 100mA,L=25mH 400 V
Emitter-base breakdown voltage V(BR)EBO IE= 10mA,IC=0 9 V
Collector cut-off current ICBO VCE= 400V, IE=0 0.1 mA
Collector Cut-off Current ICES VBE = -1.5 V, VCE = 700 V 0.1 mA
Emitter cut-off current IEBO VEB=7V, IC=0 50