Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
1. Pulse Test: Pulse Width
≤
300
ms,
Duty Cycle
≤
2.0%.
10
100
ms
1 ms
5 ms
3
T
J
= 150°C
dc
1
The Safe Operating Area Curves indicate I
C−
V
CE
limits
below which the device will not enter secondary breakdown.
Collector load lines for specific circuits must fall within the
applicable Safe Area to avoid causing a catastrophic failure.
To insure operation below the maximum T
J
,
power−temperature derating must be observed for both
steady state and pulse power conditions.
0.3
BD236
BD237
30
0.1
1
3
10
100
V
CE
, COLLECTOR-EMITTER VOLTAGE (VOLTS)
Figure 1. Active Region Safe Operating Area
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2
BD237G (NPN), BD234G, BD238G (PNP)
VCE , COLLECTOR-EMITTER VOLTAGE (VOLTS)
1.0
0.8
I
C
= 0.1 A
0.25 A
0.5 A
1.0 A
0.6
T
J
= 25°C
0.4
0.2
0
0.2
0.3
0.5
1.0
2.0
3.0
5.0
10
20
30
50
100
200
I
B
, BASE CURRENT (mA)
Figure 2. Collector Saturation Region
hFE , DC CURRENT GAIN (NORMALIZED)
1000
700
500
300
200
100
70
50
30
20
10
2.0 3.0 5.0
T
J
= + 150°C
T
J
= + 25°C
T
J
= - 55°C
1.5
V
CE
= 2.0 V
VOLTAGE (VOLTS)
1.2
0.9
V
BE(sat)
@ I
C
/I
B
= 10
0.6
V
BE
@ V
CE
= 2.0 V
0.3
V
CE(sat)
@ I
C
/I
B
= 10
10
20 30
50
100
200 300 500 1000 2000
0
2.0 3.0 5.0
10
20 30
50
100
200 300 500 1000 2000
I
C
, COLLECTOR CURRENT (mA)
I
C
, COLLECTOR CURRENT (mA)
T
J
= 25°C
Figure 3. Current Gain
Figure 4. “On” Voltages
r(t), NORMALIZED EFFECTIVE TRANSIENT
THERMAL RESISTANCE
1.0
0.7
0.5
0.3
0.2
0.1
0.07
0.05
0.03
0.02
0.01
0.01
D = 0.5
D = 0.2
D = 0.1
D = 0.05
D = 0.01
SINGLE PULSE
q
JC
(t) = r(t)
q
JC
q
JC
= 4.16°C/W MAX
q
JC
= 3.5°C/W TYP
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t
1
T
J(pk)
- T
C
= P
(pk)
q
JC
(t)
0.02 0.03
0.05
0.1
0.2 0.3
0.5
1.0
2.0 3.0
5.0
10
20
30
50
P
(pk)
t
1
t
2
DUTY CYCLE, D = t
1
/t
2
100
200 300
500
1000
t, TIME or PULSE WIDTH (ms)
Figure 5. Thermal Response
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3
BD237G (NPN), BD234G, BD238G (PNP)
ORDERING INFORMATION
Device
BD234G
BD237G
BD238G
Package
TO−225
(Pb−Free)
TO−225
(Pb−Free)
TO−225
(Pb−Free)
Shipping
500 Units / Box
500 Units / Box
500 Units / Box
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4
BD237G (NPN), BD234G, BD238G (PNP)
PACKAGE DIMENSIONS
4
TO−225
CASE 77−09
ISSUE AC
1 2
3
FRONT VIEW
3 2
1
BACK VIEW
E
A1
Q
A
PIN 4
BACKSIDE TAB
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. NUMBER AND SHAPE OF LUGS OPTIONAL.
DIM
A
A1
b
b2
c
D
E
e
L
L1
P
Q
MILLIMETERS
MIN
MAX
2.40
3.00
1.00
1.50
0.60
0.90
0.51
0.88
0.39
0.63
10.60
11.10
7.40
7.80
2.04
2.54
14.50
16.63
1.27
2.54
2.90
3.30
3.80
4.20
D
P
1
2
3
L1
L
STYLE 1:
PIN 1. EMITTER
2., 4. COLLECTOR
3. BASE
2X
b2
2X
e
b
FRONT VIEW
c
SIDE VIEW
ON Semiconductor
and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks,
copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC
reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
particular purpose, nor does SCILLC 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 special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications
and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC
does not convey any license under its patent rights nor the rights of others. SCILLC 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 the SCILLC product could create a situation where
personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and
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any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture
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