The Safe Operating Area Curves indicate IC – VCE limits
below which the device will not enter secondary breakdown.
Collector load lines for specific circuits must fall within the ap-
plicable Safe Area to avoid causing a catastrophic failure. To
insure operation below, the maximum TJ, power–tempera-
ture derating must be observed for both steady state and
pulse power conditions.
Figure 3. DC Safe Operating Area
300
200
hFE, DC CURRENT GAIN
TJ = 150°C
100
70
50
30
20
– 55°C
+ 100°C
+ 25°C
VCE = 10 V
VCE = 2.0 V
10
1.0
2.0
3.0
5.0
7.0
10
20
30
50
IC, COLLECTOR CURRENT (mAdc)
70
100
200
300
500
Figure 4. Current Gain
2
Motorola Bipolar Power Transistor Device Data
BD157 BD158 BD159
PACKAGE DIMENSIONS
–B–
U
Q
F
M
C
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
DIM
A
B
C
D
F
G
H
J
K
M
Q
R
S
U
V
INCHES
MIN
MAX
0.425
0.435
0.295
0.305
0.095
0.105
0.020
0.026
0.115
0.130
0.094 BSC
0.050
0.095
0.015
0.025
0.575
0.655
5
_
TYP
0.148
0.158
0.045
0.055
0.025
0.035
0.145
0.155
0.040
–––
MILLIMETERS
MIN
MAX
10.80
11.04
7.50
7.74
2.42
2.66
0.51
0.66
2.93
3.30
2.39 BSC
1.27
2.41
0.39
0.63
14.61
16.63
5
_
TYP
3.76
4.01
1.15
1.39
0.64
0.88
3.69
3.93
1.02
–––
–A–
1 2 3
H
K
V
G
S
D
2 PL
0.25 (0.010)
M
J
R
0.25 (0.010)
A
M
A
M
M
B
M
B
M
STYLE 1:
PIN 1. EMITTER
2. COLLECTOR
3. BASE
CASE 77–08
TO–225AA TYPE
ISSUE V
Motorola Bipolar Power Transistor Device Data
3
BD157 BD158 BD159
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different
applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does
not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in
systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of
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against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
Motorola and
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
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