SMD Type
Transistors
PNP Transistors
2SA1257
SOT-23
Unit: mm
+0.1
-0.1
2.9
0.4
+0.1
-0.1
3
Features
High breakdown voltage.
Small output capacitance.
1
2
● Very small-sized package permitting the 2SA1257/
+0.1
-0.1
+0.05
-0.01
0.95
0.1
+0.1
-0.1
1.9
2SC3143-applied sets to be made small and slim.
1.Base
2.Emitter
3.collector
Absolute Maximum Ratings Ta = 25
Parameter
Collector-base voltage
Collector-emitter voltage
Emitter-base voltage
Collector current
Symbol
VCBO
VCEO
VEBO
IC
Rating
-180
-160
-5
Unit
V
V
V
-80
mA
mA
mW
Collector current (pulse)
Collector dissipation
ICP
-150
200
125
PC
Jumction temperature
Storage temperature
Tj
Tstg
-55 to +125
■ Electrical Characteristics Ta = 25℃
Parameter
Collector- base breakdown voltage
Collector- emitter breakdown voltage
Emitter - base breakdown voltage
Collector-base cut-off current
Emitter cut-off current
Symbol
Test Conditions
Min
-180
-160
-5
Typ
Max
Unit
V
V
V
V
CBO
Ic= -100 μA, I
Ic= -1 mA, RBE=∞
= -100μA, I =0
CB= -120 V , I =0
E=0
CEO
EBO
I
E
C
I
CBO
EBO
V
V
E
-100
-100
-0.7
-1.2
-1.5
270
nA
V
I
EB= -4V , I
=-30mA, I
C=0
Collector-emitter saturation voltage
Base - emitter saturation voltage
Base - emitter voltage
V
CE(sat)
BE(sat)
I
C
B
B
=- 3mA
=- 3mA
V
I
C
=-30mA, I
V
BE
FE
on
stg
V
V
CE= -5V , I
C=-10mA
DC current gain
h
CE= -5V, I
C= -10mA
60
Turn-on time
t
0.15
0.95
0.15
2.4
See Test Circuit.
us
Storage time
t
Fall time
tf
Collector output capacitance
Transition frequency
C
ob
T
V
V
CB= -10V, f-1MHz
CE= -10V, I = -10mA
3.2
pF
f
C
130
MHz
■ Classification of hfe
Type
Range
Marking
2SA1257-G3
60-120
G3
2SA1257-G4
90-180
G4
2SA1257-G5
135-270
G5
1
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