HORIZONTAL DEFLECTION TRANSISTOR NPN BU508A 8A 1500V Technical Data ...designed for use in large screen color deflection circuits. F Collector-Emitter Voltage-VCES=1500Vdc F Low Thermal Resistance 11/4C/W increased Reliability F TO-218 Package for Low Cost Mounting F Switching Times with Inductive Loads, Tf=0.5us(Typ)@IC=4.5A MAXIMUM RATINGS Rating Symbol Value Unit Collector- Emitter Voltage V CEO 700 Vdc Collector- Emitter Voltage V CES 1500 Vdc Emitter Base Voltage Collector Current - Continuous _Peak(1) Base Current - continuous -- Peak(1) Total Power Dissipation @ TC = 25C Derate above 25C Operating and Storage junction Temperature Range V EB IC ICM IB IBM PD Vdc Adc Tj,Tstg 5 8 15 4 6 125 1 -65 to +150 Watts W/C C Symbol Max. Unit 1.0 C/W Adc THERMAL CHARACTERISTICS Characteristic Thermal resistance junction to case R thjc ELECTRICAL CHARACTERISTICS :[ Tc = 25 Characteristic C unless otherwise noted ] Symbol Min VCEO(sus) 700 Typ Max Unit * Off Characteristics : Collector-Emitter Sustaining Voltage (1) [ Ic =100 mAdc, IB = 0 ] Collector Cutoff Current [ VCE = 1500 Vdc, VBE = 0 ] Emitter Base Leakage [ VEB = 6V, Ic = 0 ] Vdc ICES 0.1 mAdc IEBO 10 mAdc * On Characteristics (1): DC Current Gain [ Ic = 2.0 Adc , VCE = 4.0 Vdc ] hFE 2.25 Collector-Emitter Saturation Voltage [ Ic = 4.5 Adc , IB = 2Adc ) VCE(sat) 1 Vdc Base-Emitter Saturation Voltage [ Ic = 4.5 Adc , IB = 2Adc ] VBE(sat) 1.3 Vdc Dynamic Characteristics : Current Gain - Bandwidth Product [ Ic = 0.1Adc,VCE=5 Vdc, ftest=1.0 MHz ] Output Capacitance (VCB=10Vdc,IE=0,f=0.1MHz) SWITCHING CHARACTERISTICS Fall Time (IC=4.5Adc,IB1=1.8Adc,LB=10H ) fT --- 7 -- MHz COB -- 125 -- pF tf ts (1) Pulse Test : Pulse Width =5ms , Duty Cycle < 10.0% --- 0.5 8 --- s s