2.30±0.05
1.25±0.05
1.30±0.03
0.30
2.00±0.05 1.01 REF
JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD
SOT-323 Plastic-Encapsulate DIODE
BAS19W/20W/21W SWITCHING DIODE
FEATURES
Power dissipation
P
D : 200 mWTamb=25℃)
Collector current
IF : 200 mA
Collector-base voltage
VR : 19W:120 V; 20W:150V ; 21W:200V
Operating and storage junction temperature range
T
JTstg: -55 to +150℃ 
ELECTRICAL CHARACTERISTICSTamb=25 unless otherwise specified
Parameter Symbol
Test conditions MIN MAX UNIT
BAS19W
Reverse breakdown voltage BAS20W
BAS21W
V(BR) R IR= 100µA 100
150
200
V
BAS19W
Reverse voltage leakage current BAS20W
BAS21W
IR 100V
VR=150V
200V
0.1 µA
Forward voltage VF IF=100mA
IF=200mA 1000
1250 mV
Diode capacitance CD VR=0V f=1MHz 5 pF
Reveres recovery time trr IF=IR=30mA
Irr=0.1×IR 50 nS
Unit : mm
SOT-323
1.BASE
2.EMITTER 
3.COLLECTOR
 
Marking :BAS19W KA8
BAS20W KT2
BAS21W KT3
SOT-323 PACKAGE OUTLINE DIMENSIONS
Symbol
A
A1
A2
b
c
D
E
E1
e
e1
L
L1
θ
Min
0.900
0.000
0.900
0.200
0.080
2.000
1.150
2.150
1.200
0.260
Max
1.100
0.100
1.000
0.400
0.150
2.200
1.350
2.450
1.400
0.460
Min
0.035
0.000
0.035
0.008
0.003
0.079
0.045
0.085
0.047
0.010
Max
0.043
0.004
0.039
0.016
0.006
0.087
0.053
0.096
0.055
0.018
Dimensions In Millimeters Dimensions In Inches
0.026TYP
0.021REF
0.650TYP
0.525REF
D
b
e1
e
L
A
A1
A2
L1
θ
E1
E
0.02
c