Surface Mount Schottky Barrier Diode
*High Reliability
*Low Voltage
*Small Surface Mounting Type
*Case : Molded Plastic
*Terminals : Solderable per MIL-STD-202,Method 208
*Polarity : See Diagrams Below
*Weight : 0.008 grams (approx.)
*Mounting Position : Any
Features:
WSD421
WSD425
Mechanical Data:
SCHOTTKY BARRIER
RECTIFIERS
100mAMPERES
40VOLTS
WEITRON
http://www.weitron.com.tw
SOT-23
1
2
3
SOT-23 Outline Dimensions
Unit:mm
Dim
A
B
C
D
E
G
H
J
K
L
M
Min
0.35
1.19
2.10
0.85
0.46
1.70
2.70
0.01
0.89
0.30
0.076
Max
0.51
1.40
3.00
1.05
1.00
2.10
3.10
0.13
1.10
0.61
0.25
A
B
D
E
G
M
L
H
J
TOP VIEW
K
C
Maximum Ratings
(TJ=25 C Unless otherwise noted)
Characteristic
Peak Reverse Voltage
DC Reverse Voltage
Peak Forward Surge Current
Operating Junction
Temperature Range
Storage Temperature Range
Symbol
VRM
VR
Io
IFSM
TJ
Tstg
Limits
Unit
40
40
1.0
125
-40 to +125
Volts
Volts
A
A
Electrical Characteristics
(TA=25 C Unless otherwise noted)
Device Marking
Item
Marking
Eqivalent Circuit diagram
1
3
1
2
3
WSD421
WSD425
LV3
KL3
WSD421
WSD425
http://www.weitron.com.tw
WEITRON
C
C
(2)
Characteristic
Symbol
Forward Voltage(I =100mA)
Forward Voltage(I =10mA)
Reverse Cureent(V =10V)
Capacitance Between Terminals
VF1
VF2
C
IR
Min
Typ
Max
Unit
0.34
Volts
Volts
uA
P
-
-
-
-
-
-
0.55
-
30
-
6.0
NOTE:
2. 60HE for 1
Mean Rectifying Current
0.1
T
F
F
F
R
(V =10V, f=1MHz)
F
FIG.3 Capacitance Between
Terminals Characteristics
FIG.1 Forward Characteristics
FIG.2 Reverse Characteristics
Electrical Characteristic Curves
(Ta=25 C)
WSD421
WSD425
WEITRON
http://www.weitron.com.tw
0
1
100m
10m
1m
100
10
Ta=
125
C
0.1
0.2
0.3
0.4
0.5
0.6
0.7
75
C
25
C
-25
C
pulse measurement
Typ.
FOR
W
ARD CURREN
T :
I
F
(A)
FORWARD VOLTAGE
: V
F
(V)
0
5
10
15
20
25
30
35
0.1
1
100
10
1m
10m
pulse measurement
Typ.
RE
VERSE CURRENT :
I
R
(A)
REVERSE VOLTAGE :
V
R
(V)
75 C
25 C
Ta
=125 C
0
5
10
15
20
25
0.1
1
10
100
C
AP
A
CIT
ANCE BET
WEEN TERMINALS :
C
T
(pF)
REVERSE VOLTAGE
: V
R
(V)
0
0
20
40
60
80
100
25
50
75
100
125
Io CURRENT (%)
AMBIENT TEMPERATURE : T
a ( C)
FIG.4 Derating Curve
(Mounting on Glass Epoxy PCBS)
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