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DARLINGTON POWER TRANSISTOR
2SA1841
PNP SILICON EPITAXIAL TRANSISTOR (DARLINGTON CONNECTION)
FOR HIGH-SPEED SWITCHING
DATA SHEET
Document No. D15590EJ3V0DS00 (3rd edition)
Date Published July 2004 NS CP(K)
Printed in Japan
2002
ORDERING INFORMATION
PART NUMBER
PACKAGE
2SA1841
MP-10
DESCRIPTION
The 2SA1841 is a high-speed Darlington power transistor.
This transistor is ideal for high-precision control such as PWM
control for pulse motors brushless motors in OA and FA equipment.
In addition, this transistor features a package that can be auto-
mounted in radial taping specifications, thus contributing to
mounting cost reduction.
FEATURES
Auto-mounting possible in radial taping specifications
Resin-molded insulation type package with power rating of 1.8 W in stand-alone conditions
High DC current amplifiers due to Darlington connection
h
FE
= 4000 to 20000 (V
CE
=
-2.0 V, I
C
=
-4.0 A)
On-chip C-to-E reverse diode
Fast switching speed
ABSOLUTE MAXIMUM RATINGS (T
A
= 25C)
Collector to Base Voltage
V
CBO
-100
V
Collector to Emitter Voltage
V
CEO
-100
V
Emitter to Base Voltage
V
EBO
-8.0
V
Collector Current (DC)
I
C(DC)
-8.0
A
Collector Current (pulse)
I
C(pulse)
Note
-16
A
Base Current (DC)
I
B(DC)
-0.8
A
Total Power Dissipation (T
A
= 25C)
P
T
1.8
W
Junction Temperature
T
j
150
C
Storage Temperature
T
stg
-55 to +150
C
Note PW
10 ms, Duty Cycle 2%
The mark
shows major revised points.
Data Sheet D15590EJ3V0DS
2
2SA1841
ELECTRICAL CHARACTERISTICS (T
A
= 25C)
CHARACTERISTICS SYMBOL TEST
CONDITIONS MIN.
TYP.
MAX.
UNIT
Collector Cut-off Current
I
CBO
V
CB
=
-100 V, I
E
= 0 A
-1.0
A
Emitter Cut-off Current
I
EBO
V
EB
=
-5.0 V, I
C
= 0 A
-5.0 mA
DC Current Gain
Note
h
FE1
V
CE
=
-2.0 V, I
C
=
-4.0 A
4000
20000
h
FE2
V
CE
=
-2.0 V, I
C
=
-8.0 A
500
Collector Saturation Voltage
Note
V
CE(sat)
I
C
=
-4.0 A, I
B
=
-4.0 mA
-1.5 V
Base Saturation Voltage
Note
V
BE(sat)
I
C
=
-4.0 A, I
B
=
-4.0 mA
-2.0 V
Turn-on Time
t
on
I
C
=
-4.0 A
0.2
s
Storage Time
t
stg
I
B1
=
-I
B2
=
-4.0 mA
1.5
s
Fall Time
t
f
R
L
= 12.5
, V
CC
=
-50 V
0.7
s
Note Pulsed test PW
350 ms, Duty Cycle 2%
h
FE
CLASSIFICATION
Marking L
K
h
FE1
4000 to 10000
8000 to 20000
SWITCHING TIME (t
on
, t
stg
, t
f
) TEST CIRCUIT
V
CC
R
L
I
B1
I
B2
I
C
I
C
T.U.T.
V
IN
PW
PW
=
50 s
V
BB
=
-
5 V
Duty Cycle
2%
Base current
waveform
Collector current
waveform
t
on
t
stg
t
f
90%
I
B1
I
B2
10%
.
.
.
.
Data Sheet D15590EJ3V0DS
3
2SA1841
TYPICAL CHARACTERISTICS (T
A
= 25C)
T
o
tal
P
o
wer Di
ss
i
p
a
t
i
on
P
T
(W)
Ambient Temperature Ta (
C)
Pulse test
DC Cur
r
ent
Gai
n
h
FE
Collector to Emitter Voltage V
CE
(V)
Ambient Temperature Ta (
C)
IC
D
e
r
a
tin
g
d
T
(
%
)
Col
l
e
c
t
or Cu
rrent
I
C
(
A
)
Col
l
e
c
t
o
r
Current
I
C
(
A
)
T
r
an
s
i
e
n
t
T
h
e
r
m
a
l
R
e
s
i
s
t
an
c
e
r
t
h
(j
-a
)
(t
)
(
C/
W)
Pulse Width PW (s)
Collector to Emitter Voltage V
CE
(V)
Collector Current I
C
(A)
Single pulse
Data Sheet D15590EJ3V0DS
5
2SA1841
PACKAGE DRAWING (Unit: mm)
MP-10
TAPING SPECIFICATION
1
3
2
1: Base
2: Collector
3: Emitter
13.0 0.2
2.5 0.2
1.4 0.2
1.4 0.2
8.0 0.2
4.5 0.2
0.5 0.1
0.5 0.1
0.5 0.1
2.5 TYP.
2.5 TYP.
H
1
l
1
H
1
A
1
P
2
P
0
D
0
P
T
A
1
A
D
0
d
F
1
F
2
H
H
0
H
1
h
l
1
P
P
0
P
2
P
T
W
W
0
W
1
W
2
8.0 0.2
13.0 0.2
4.0 0.2
0.5 0.1
2.5
2.5
20.0 MAX.
16.0 0.5
32.2 MAX.
0 1.0
2.5 MIN.
12.7 1.0
12.7 0.3
6.35 0.5
0 1.3
4.5 0.2
18.0
5.0 MIN.
9.0 0.5
0.7 MIN.
h
P
h
H
1
A
W
2
W
0
W
1
W
d
F
1
F
2
+0.4
-
0.1
+0.4
-
0.1
+1.0
-
0.5
EQUIVALENT CIRCUIT
3
1
2
R
2
R
1
R
1
= 3.0 k
.
.
R
2
= 300
.
.
1. Base
2. Collector
3. Emitter
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