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 1¼C/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 V EB 5 Vdc
Collector Current – Continuous
_Peak(1) I C
ICM
8
15 Adc
Base Current – continuous
-- Peak(1) IB
IBM 4
6 Adc
Total Power Dissipation @ TC = 25°C
Derate above 25°CPD 125
1Watts
W/°C
Operating and Storage junction
Temperature Range Tj,Tstg -65 to +150 °C
THERMAL CHARACTERISTICS
Characteristic Symbol Max. Unit
Thermal resistance junction to case R thjc 1.0 °C/W
ELECTRICAL CHARACTERISTICS :[ Tc = 25 °C unless otherwise noted ]
Characteristic Symbol Min Typ Max Unit
* Off Characteristics :
Collector–Emitter Sustaining Voltage (1)
[ Ic =100 mAdc, IB = 0 ] VCEO(sus) 700 Vdc
Collector Cutoff Current
[ VCE = 1500 Vdc, VBE = 0 ] ICES 0.1 mAdc
Emitter Base Leakage
[ VEB = 6V, Ic = 0 ] 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,V
CE=5 Vdc, ftest=1.0 MHz ]
fT--- 7 -- MHz
Output Capacitance
(VCB=10Vdc,IE=0,f=0.1MHz) COB -- 125 -- pF
SWITCHING CHARACTERISTICS
Fall Time
(IC=4.5Adc,IB1=1.8Adc,LB=10µH ) tf--- 0.5 --- µs
ts 8µs
(1) Pulse Test : Pulse Width =5ms , Duty Cycle < 10.0%
