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Continental Device India Limited
An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company
NPN SILICON PLANAR EPITAXIAL TRANSISTORS
CB E
BC237,238, A,B,C
BC239, B,C
TO-92
Plastic Package
For Lead Free Parts, Device
Part # will be Prefixed with
"T"
Amplifier Transistors
ABSOLUTE MAXIMUM RATINGS (Ta=25ºC)
DESCRIPTION
SYMBOL
Collector Emitter Voltage
VCEO
Collector Emitter Voltage
Emitter Base Voltage
VCES
VEBO
Collector Current Continuous
IC
Power Dissipation at Ta=25ºC
PD
Derate Above 25ºC
Power Dissipation at Tc=25ºC
PD
Derate Above 25ºC
Operating And Storage Junction
Temperature Range
Tj, Tstg
BC237
45
50
6.0
BC238
25
30
5.0
100
350
2.8
1.0
8.0
- 55 to +150
THERMAL RESISTANCE
Junction to Ambient in free air
Junction to Case
Rth (j-a)
Rth (j-c)
357
125
ELECTRICAL CHARACTERISTICS (Ta=25ºC unless specified otherwise)
DESCRIPTION
SYMBOL
TEST CONDITION
Collector Emitter Voltage
VCEO
IC=2mA, IB=0
BC237
Emitter Base Voltage
VEBO
BC238/BC239
IE=10µA, IC=0
BC237
BC238/BC239
Collector Cut Off Current
ICES BC238/BC239
VCE=30V, VBE=0
BC237
VCE=50V, VBE=0
MIN
45
25
6.0
5.0
BC238/BC239
VCE=30V, VBE=0, Ta=125ºC
BC237
VCE=50V, VBE=0, Ta=125ºC
BC237_239Rev_1 201205E
BC239
25
30
5.0
MAX
15
15
4.0
4.0
UNITS
V
V
V
mA
mW
mW/ºC
W
mW/ºC
ºC
ºC/W
ºC/W
UNITS
V
V
V
V
nA
nA
µA
µA
Continental Device India Limited
Data Sheet
Page 1 of 5

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NPN SILICON PLANAR EPITAXIAL TRANSISTORS
BC237,238, A,B,C
BC239, B,C
CB E
TO-92
Plastic Package
For Lead Free Parts, Device
Part # will be Prefixed with
"T"
ELECTRICAL CHARACTERISTICS (Ta=25ºC unless specified otherwise)
DESCRIPTION
DC Current Gain
SYMBOL
hFE
TEST CONDITION
IC=10µA, VCE=5V
A
B
C
IC=2mA, VCE=5V
BC237/238/239
A
B
C
*IC=100mA, VCE=5V
A
B
Collector Emitter Saturation Voltage VCE (sat)
C
IC=10mA, IB=0.5mA
Base Emitter Saturation Voltage
Base Emitter On Voltage
VBE (sat)
VBE (on)
*IC=100mA, IB=5mA
BC237/239
BC238
IC=10mA, IB=0.5mA
*IC=100mA, IB=5mA
IC=2mA, VCE=5V
SMALL SIGNAL CHARACTERISTICS
DESCRIPTION
SYMBOL
TEST CONDITION
Transistors Frequency
fT IC=0.5mA, VCE=3V, f=100MHz
BC237
BC238
BC239
Collector Output Capacitance
Emitter Input Capacitance
Noise Figure
IC=10mA, VCE=5V, f=100MHz
Cob VCB=10V, IE=0, f=1MHz
Cib VEB=0.5V, f=1MHz
NF VCE=5V, IC=0.2mA, RS=2K,
f=1KHz, B=200Hz
BC237/238
BC239
*Pulse Test: Pulse Width < 300µs, Duty Cycle < 2%
BC237_239Rev_1 201205E
MIN MAX
TYP90
TYP150
TYP270
120 800
120 220
200 460
380 800
TYP120
TYP180
TYP300
0.20
0.60
0.80
0.83
1.05
0.55 0.70
MIN MAX
TYP100
TYP120
TYP140
150
4.5
TYP8
10
4.0
UNITS
V
V
V
V
V
V
UNITS
MHz
MHz
MHz
MHz
pF
pF
dB
dB
Continental Device India Limited
Data Sheet
Page 2 of 5

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BC237,238, A,B,C
BC239, B,C
B
1
2
3
D AA
G
TO-92 Plastic Package
D
SEC AA
TO-92
Plastic Package
For Lead Free Parts, Device
Part # will be Prefixed with
"T"
DIM MIN. MAX.
A 4.32 5.33
B 4.45 5.20
C 3.18 4.19
D 0.41 0.55
E 0.35 0.50
F 5 DEG
G 1.14 1.40
H 1.20 1.40
K 12.70
L 1.982 2.082
M 1.03 1.20
All dimensions are in mm
FF
Mold
Parting
Line
321
PIN CONFIGURATION
1. EMITTER
2. BASE
3. COLLECTOR
321
The TO-92 Package , Tape and Ammo Pack drawings are correct as on the date of issue/revision of this Data Sheet.
The currently valild dimensions and information, may please be confirmed from the TO-92 Drawing in the Packages and
Packing Section of the Product Catalogue.
Packing Details
PACKAGE
STANDARD PACK
Details
Net Weight/Qty
TO-92 Bulk
TO-92 T&A
1K/polybag
2K/ammo box
200 gm/1K pcs
645 gm/2K pcs
INNER CARTON BOX
Size
Qty
3" x 7.5" x 7.5"
12.5" x 8" x 1.8"
5K
2K
OUTER CARTON BOX
Size
Qty
Gr Wt
17" x 15" x 13.5"
17" x 15" x 13.5"
80K
32K
23 kgs
12.5 kgs
BC237_239Rev_1 201205E
Continental Device India Limited
Data Sheet
Page 3 of 5

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BC237,238, A,B,C
BC239, B,C
TO-92
Plastic Package
For Lead Free Parts, Device
Part # will be Prefixed with
"T"
Component Disposal Instructions
1. CDIL Semiconductor Devices are RoHS compliant, customers are requested to please
dispose as per prevailing Environmental Legislation of their Country.
2. In Europe, please dispose as per EU Directive 2002/96/EC on Waste Electrical and
Electronic Equipment (WEEE).
BC237_239Rev_1 201205E
Continental Device India Limited
Data Sheet
Page 4 of 5

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Customer Notes
BC237,238, A,B,C
BC239, B,C
TO-92
Plastic Package
For Lead Free Parts, Device
Part # will be Prefixed with
"T"
Disclaimer
The product information and the selection guides facilitate selection of the CDIL's Semiconductor Device(s) best suited for
application in your product(s) as per your requirement. It is recommended that you completely review our Data Sheet(s) so as to
confirm that the Device(s) meet functionality parameters for your application. The information furnished in the Data Sheet and on
the CDIL Web Site/CD are believed to be accurate and reliable. CDIL however, does not assume responsibility for inaccuracies or
incomplete information. Furthermore, CDIL does not assume liability whatsoever, arising out of the application or use of any
CDIL product; neither does it convey any license under its patent rights nor rights of others. These products are not designed for
use in life saving/support appliances or systems. CDIL customers selling these products (either as individual Semiconductor
Devices or incorporated in their end products), in any life saving/support appliances or systems or applications do so at their own
risk and CDIL will not be responsible for any damages resulting from such sale(s).
CDIL strives for continuous improvement and reserves the right to change the specifications of its products without prior notice.
CDIL is a registered Trademark of
Continental Device India Limited
C-120 Naraina Industrial Area, New Delhi 110 028, India.
Telephone + 91-11-2579 6150, 5141 1112 Fax + 91-11-2579 5290, 5141 1119
email@cdil.com www.cdilsemi.com
BC237_239Rev_1 201205E
Continental Device India Limited
Data Sheet
Page 5 of 5