ST BC635 / BC637 / BC639
NPN Silicon Epitaxial Planar Transistor
Medium Power Transistors
for driver stages of audio / video amplifiers
1.Emitter 2.Collector 3.Base
TO-92 Plastic Package
Weight approx. 0.19g
Absolute Maximum Ratings (T
a
= 25
O
C)
Parameter
Collector Base Voltage
BC635
BC637
BC639
BC635
BC637
BC639
Symbol
V
CBO
Value
45
60
100
45
60
80
5
1
1.5
100
200
830
150
- 55 to + 150
Unit
V
Collector Emitter Voltage
V
CEO
V
EBO
I
C
I
CM
I
B
I
BM
P
tot
T
j
T
S
V
V
A
A
mA
mA
mW
O
Emitter Base Voltage
Collector Current
Peak Collector Current
Base Current
Peak Base Current
Power Dissipation
Junction Temperature
Storage Temperature Range
C
C
O
SEMTECH ELECTRONICS LTD.
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 15/03/2007
ST BC635 / BC637 / BC639
Characteristics at T
a
= 25
O
C
Parameter
DC Current Gain
at V
CE
= 2 V, I
C
= 5 mA
at V
CE
= 2 V, I
C
= 150 mA
at V
CE
= 2 V, I
C
= 500 mA
Collector Cutoff Current
at V
CB
= 30 V
Emitter Cutoff Current
at V
EB
= 5 V
Collector Base Breakdown Voltage
at I
C
= 100 µA
Symbol
h
FE
h
FE
h
FE
h
FE
I
CBO
I
EBO
BC635
BC637
BC639
BC635
BC637
BC639
Min.
40
40
40
25
-
-
45
60
100
45
60
80
5
-
-
100
Max.
-
250
160
-
100
100
-
-
-
-
-
-
-
0.5
1
-
Unit
-
-
-
-
nA
nA
BC635
BC637 / BC639
V
(BR)CBO
V
Collector Emitter Breakdown Voltage
at I
C
= 10 mA
V
(BR)CEO
V
Emitter Base Breakdown Voltage
at I
E
= 10 µA
Collector Emitter Saturation Voltage
at I
C
= 500 mA, I
B
= 50 mA
Base Emitter Voltage
at V
CE
= 2 V, I
C
= 500 mA
Gain Bandwidth Product
at V
CE
= 5 V, I
C
= 50 mA, f = 100 MHz
V
(BR)EBO
V
CE(sat)
V
BE
f
T
V
V
V
MHz
SEMTECH ELECTRONICS LTD.
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 15/03/2007
ST BC635 / BC637 / BC639
Static Characteristics
1.8m A
DC Current Gain
c
(mA)
1.6m A
1.4m A
1.2m A
1.0m A
0.8m A
0.6m A
0.4m A
Collector Current I
I
B
=0.2 m
A
C ollector Em itter V oltage V
C E
(V )
DC Current Gain h
FE
Collector Current I
C
(mA)
Base Emitter Saturation Voltage
Collector Emitter Saturation Voltage
Base Emitter On Voltage
Saturation Voltage
V
CE(sat)
, V
BE(sat)
(V)
Collector Current Ic (mA)
Base Emitter Voltage V
BE
(V)
C o l l e c t o r C u r r e n t I
C
( m A )
Collector Output Capacitance
Capacitance C
ob
(pF)
Collector Base Voltage V
CB
(V)
SEMTECH ELECTRONICS LTD.
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 15/03/2007
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