1
Transistor
2SD1205, 2SD1205A
Silicon NPN epitaxial planer type darlington
For low-frequency amplification
s
Features
q
Forward current transfer ratio h
FE
is designed high, which is ap-
propriate to the driver circuit of motors and printer bammer: h
FE
= 4000 to 2000.
q
A shunt resistor is omitted from the driver.
q
M type package allowing easy automatic and manual insertion as
well as stand-alone fixing to the printed circuit board.
s
Absolute Maximum Ratings
(Ta=25C)
Unit: mm
Parameter
Collector to
base voltage
Collector to
emitter voltage
Emitter to base voltage
Peak collector current
Collector current
Collector power dissipation
Junction temperature
Storage temperature
1:Base
2:Collector
EIAJ:SC71
3:Emitter
M Type Mold Package
6.9
0.1
0.55
0.1
0.45
0.05
1.0
0.1
1.0
2.5
0.1
1.0
1.5
1.5 R0.9
R0.9
R0.7
0.4
0.85
3.5
0.1
2.0
0.2
2.4
0.2
1.25
0.05
4.1
0.2
4
.5
0.1
2.5
2.5
1
2
3
Symbol
V
CBO
V
CEO
V
EBO
I
CP
I
C
P
C
T
j
T
stg
Ratings
30
60
25
50
5
750
500
400
150
55 ~ +150
Unit
V
V
V
mA
mA
mW
C
C
2SD1205
2SD1205A
2SD1205
2SD1205A
s
Electrical Characteristics
(Ta=25C)
Parameter
Collector cutoff current
Emitter cutoff current
Collector to base
voltage
Collector to emitter
voltage
Emitter to base voltage
Forward current transfer ratio
Collector to emitter saturation voltage
Base to emitter saturation voltage
Transition frequency
Symbol
I
CBO
I
EBO
V
CBO
V
CEO
V
EBO
h
FE
*1
V
CE(sat)
V
BE(sat)
f
T
Conditions
V
CB
= 25V, I
E
= 0
V
EB
= 4V, I
C
= 0
I
C
= 100
A, I
E
= 0
I
C
= 1mA, I
B
= 0
I
E
= 100
A, I
C
= 0
V
CE
= 10V, I
C
= 500mA
*2
I
C
= 500mA, I
B
= 0.5mA
*2
I
C
= 500mA, I
B
= 0.5mA
*2
V
CB
= 10V, I
E
= 50mA, f = 200MHz
min
30
60
25
50
5
4000
typ
150
max
100
100
20000
2.5
3
Unit
nA
nA
V
V
V
V
V
MHz
Internal Connection
B
C
E
200
*1
h
FE
Rank classification
Rank
Q
R
h
FE
4000 ~ 10000 8000 ~ 20000
*2
Pulse measurement
2SD1205
2SD1205A
2SD1205
2SD1205A
2
Transistor
P
C
-- Ta
V
CE(sat)
-- I
C
V
BE(sat)
-- I
C
h
FE
-- I
C
C
ob
-- V
CB
0
160
40
120
80
140
20
100
60
0
500
400
300
200
100
Ambient temperature Ta (C)
Collector power dissipation P
C
(mW
)
0.01
0.1
1
10
0.03
0.3
3
0.01
0.03
0.1
0.3
1
3
10
30
100
I
C
/I
B
=1000
25C
25C
Ta=75C
Collector current I
C
(A)
Collector to emitter saturation voltage V
CE(sat)
(V
)
0.01
0.1
1
10
0.03
0.3
3
0.01
0.03
0.1
0.3
1
3
10
30
100
I
C
/I
B
=1000
Ta=25C
25C
75C
Collector current I
C
(A)
Base to emitter saturation voltage V
BE(sat)
(V
)
0.01
0.1
1
10
0.03
0.3
3
10
10
2
10
3
10
4
10
5
V
CE
=10V
Ta=75C
25C
25C
Collector current I
C
(A)
Forward current transfer ratio h
FE
1
3
10
30
100
0
8
6
2
5
7
4
1
3
I
E
=0
f=1MHz
Ta=25C
Collector to base voltage V
CB
(V)
Collector output capacitance C
ob
(pF
)
2SD1205, 2SD1205A
PDF 
ZIP