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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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
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