BD237 (NPN), BD234 (PNP),
BD238 (PNP)
Preferred Devices
Plastic Medium Power
Bipolar Transistors
Designed for use in 5.0 to 10 W audio amplifiers and drivers
utilizing complementary or quasi complementary circuits.
http://onsemi.com
Features
2.0 AMPERES
POWER TRANSISTORS
25 WATTS
• DC Current Gain −
h
= 40 (Min) @ I = 0.15 Adc
C
FE
• Epoxy Meets UL 94 V0 @ 0.125 in
• ESD Ratings: Human Body Model, 3B; >8000 V
Machine Model, C; >400 V
• Pb−Free Packages are Available*
TO−225
CASE 77
STYLE 1
MAXIMUM RATINGS
3
2
1
BD237
BD238
Rating
Collector−Emitter Voltage
Collector−Base Voltage
Emitter−Base Voltage
Collector Current
Symbol
BD234
45
Unit
Vdc
Vdc
Vdc
Adc
Adc
W
MARKING DIAGRAM
V
CEO
V
CBO
V
EBO
80
60
100
YWW
BD23xG
5.0
2.0
1.0
25
I
I
C
Base Current
BD23x = Device Code
x
Y
WW
G
B
= 4, 7 or 8
= Year
= Work Week
= Pb−Free Package
Total Device Dissipation
P
D
@ T = 25_C
C
Operating and Storage Junction
Temperature Range
T , T
–55 to +150
_C
J
stg
ORDERING INFORMATION
THERMAL CHARACTERISTICS
Characteristic
Device
Package
Shipping
Symbol
Max
Unit
BD234
TO−225
500 Units / Box
500 Units / Box
Thermal Resistance, Junction−to−Case
R
5.0
_C/W
q
JC
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are
exceeded, device functional operation is not implied, damage may occur and
reliability may be affected.
BD234G
TO−225
(Pb−Free)
BD237
TO−225
500 Units / Box
500 Units / Box
BD237G
TO−225
(Pb−Free)
BD238
TO−225
500 Units / Box
500 Units / Box
BD238G
TO−225
(Pb−Free)
Preferred devices are recommended choices for future use
and best overall value.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2005
1
Publication Order Number:
November, 2005 − Rev. 14
BD237/D