BUL38D
HIGH VOLTAGE FAST-SWITCHING
NPN POWER TRANSISTOR
n STMicroelectronics PREFERRED
SALESTYPE
n HIGH VOLTAGE CAPABILITY
n LOW SPREAD OF DYNAMIC PARAMETERS
n MINIMUM LOT-TO-LOT SPREAD FOR
RELIABLE OPERATION
n LOW BASE-DRIVE REQUIREMENTS
n VERY HIGH SWITCHING SPEED
n FULLY CHARACTERISED AT 125
o
C
n HIGH RUGGEDNESS
n INTEGRATED ANTIPARALLEL
COLLECTOR-EMITTER DIODE
APPLICATIONS
n ELECTRONIC TRANSFORMERS FOR
HALOGEN LAMPS
n SWITCH MODE POWER SUPPLIES
DESCRIPTION
The BUL38D is manufactured using high voltage
Multi Epitaxial Planar technology for high
switching speeds and high voltage withstand
capability.
The BUL series is designed for use in lighting
applications and low cost switch-mode power
supplies.

INTERNAL SCHEMATIC DIAGRAM
June 2000
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCES Collector-Emitter Voltage (VBE = 0) 800 V
V
CEO
Collector-Emitter Voltage (I
B
= 0) 450 V
VEBO Emitter-Base Voltage (IC =0) 9 V
IC Collector Current 5 V
I
CM
Collector Peak Current (t
p
<5 ms) 10 A
IB Base Current 2 A
I
BM
Base Peak Current (t
p
<5 ms) 4 A
Ptot Total Dissipation at Tc = 25
o
C8W
stg
Storage Temperature -65 to 150
o
C
T
j
Max. Operating Junction Temperature 150
o
C
1
2
3
TO-220
1/6