isc
Silicon NPN Power Transistor
BD157
DESCRIPTION
·Collector–Emitter
Sustaining Voltage-
: V
CEO(SUS)
= 250V(Min)
·DC
Current Gain-
: h
FE
= 30~240(Min) @ I
C
= 50mA
·Minimum
Lot-to-Lot variations for robust device
performance and reliable operation
APPLICATIONS
·Designed
for power output stages for television, radio,
phonograph and other consumer product applications.
ABSOLUTE MAXIMUM RATINGS(T
a
=25
℃)
SYMBOL
V
CBO
V
CEO
V
EBO
I
C
I
CM
I
B
P
C
T
i
T
stg
PARAMETER
Collector-Base Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Collector Current-Continuous
Collector Current-Peak
Base Current-Continuous
Collector Power Dissipation
T
C
=25℃
Junction Temperature
Storage Temperature Range
VALUE
275
250
5
0.5
1.0
0.25
20
150
-65~150
UNIT
V
V
V
A
A
A
W
℃
℃
THERMAL CHARACTERISTICS
SYMBOL
R
th j-c
PARAMETER
Thermal Resistance,Junction to Case
MAX
6.25
UNIT
℃/W
isc website
：
www.iscsemi.com
1
isc & iscsemi
is registered trademark
isc
Silicon NPN Power Transistor
ELECTRICAL CHARACTERISTICS
T
C
=25℃ unless otherwise specified
SYMBOL
V
CEO(SUS)
V
(BR)CBO
V
(BR)EBO
V
CE
(sat)
I
CBO
I
EBO
h
FE
PARAMETER
Collector-Emitter Sustaining Voltage
Collector-Base Breakdown Voltage
Emitter-Base Breakdown Voltage
Collector-Emitter Saturation Voltage
Collector Cutoff Current
Emitter Cutoff Current
DC Current Gain
CONDITIONS
I
C
= 1.0mA; I
B
= 0
I
C
= 0.1mA; I
E
= 0
I
E
= 0.1mA; I
C
= 0
I
C
= 50mA ;I
B
= 5mA
V
CB
= 275V
;
I
E
= 0
V
EB
= 5V; I
C
= 0
I
C
= 50m A; V
CE
= 10V
30
MIN
250
275
5
BD157
MAX
UNIT
V
V
V
1.0
0.1
0.1
240
V
mA
mA
NOTICE：
ISC reserves the rights to make changes of the content herein the datasheet at any time without
notification. The information contained herein is presented only as a guide for the applications of
our products.
ISC products are intended for usage in general electronic equipment. The products are not designed
for use in equipment which require specialized quality and/or reliability, or in equipment which
could have applications in hazardous environments, aerospace industry, or medical field. Please
contact us if you intend our products to be used in these special applications.
ISC makes no warranty or guarantee regarding the suitability of its products for any particular
purpose, nor does ISC assume any liability arising from the application or use of any products, and
specifically disclaims any and all liability, including without limitation special, consequential or
incidental damages.
isc website
：
www.iscsemi.com
2
isc & iscsemi
is registered trademark
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