SMD Switching Diode
1N4448WS
List
Formosa MS
List................................................................................................. 1
Package outline............................................................................... 2
Features.......................................................................................... 2
Mechanical data............................................................................... 2
Maximum ratings ............................................................................. 2
Rating and characteristic curves........................................................ 3
Pinning information........................................................................... 4
Marking........................................................................................... 4
Suggested solder pad layout............................................................. 4
Packing information.......................................................................... 5
Reel packing.................................................................................... 6
Suggested thermal profiles for soldering processes............................. 6
High reliability test capabilities........................................................... 7
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/02/10
Revised Date
2010/03/10
Revision
B
Page.
7
Page 1
DS-221925
SMD Switching Diode
1N4448WS
150mA Surface Mount
Switching Diode -100V
Package outline
Features
•
Fast switching speed.
•
Electrically identical to standard JEDEC.
•
Surface mount package ideally suited for automatic insertion.
•
Tiny plastic SMD package.
•
High Conductance.
•
Silicon epitaxial planar chip.
•
Lead-free parts for green partner, exceeds environmental
standards of MIL-STD-19500 /228
Formosa MS
SOD-323F
0.053(1.35)
0.045(1.15)
0.071(1.80)
0.063(1.60)
•
Suffix "-H" indicates Halogen free part, ex. 1N4448WS-H
0.003(0.08)
0.016(0.40)
0.016(0.40)
0.010(0.25)
0.039(1.00)
0.031(0.80)
Mechanical data
•
Epoxy:UL94-V0 rated flame retardant
•
Case : Molded plastic, SOD-323F
•
Terminals : Solder plated, solderable per
MIL-STD-750, Method 2026
0.106(2.70)
0.091(2.30)
•
Polarity : Indicated by cathode band
•
Mounting Position : Any
•
Weight : Approximated 0.005 gram
Dimensions in inches and (millimeters)
Maximum ratings and Electrical Characteristics
(AT
PARAMETER
Repetitive peak reverse voltage
Reverse voltage
Peak forward surge current
Repetitive peak forward voltage
Forward current
Average forward current
Power dissipation
Junction temperature range
Storage temperature range
Forward voltage
I
F
= 5 mA
I
F
= 100 mA
V
R
= 20 V
Reverse current
V
R
= 20 V , T
j
= 150 C
V
R
= 100 V
Diode capacitance
Rectification efficiency
Reverse recovery time
V
R
= 0 V , f = 1MHz , V
HF
= 50mV
V
HF
= 2 V , f = 100MHz
o
T
A
=25 C unless otherwise noted)
Symbol
V
RRM
V
R
I
FSM
I
FRM
I
F
I
FAV
P
D
T
J
T
STG
V
F
V
F
I
R
I
R
I
R
C
D
n
R
t
rr
45
4
-55
-55
0.62
0.93
MIN.
TYP.
MAX. UNIT
100
75
2.0
500
300
150
500
+150
+150
0.72
1.00
25
50
5.0
4.0
V
V
A
mA
mA
mA
mW
o
o
CONDITIONS
t
p
= 1 us
C
C
o
V
nA
uA
uA
pF
%
ns
I
F
= 10 mA , V
R
= 6V , I
RR
= 0.1 X I
R
, R
L
= 100
OHM
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/02/10
Revised Date
2010/03/10
Revision
B
Page.
7
Page 2
DS-221925
Rating and characteristic curves (1N4448WS)
FIG.1-TYPICAL FORWARD
CHARACTERISTICS
1000
FIG.3 - TYPICAL REVERSE
CHARACTERISTICS
INSTANTANEOUS FORWARD CURRENT,(mA)
T
J
=25 C
100
REVERSE CURRENT, (nA)
1000
T
J
=25 C
Pulse Width 300us
1% Duty Cycle
Scattering Limit
10
100
Scattering Limit
1.0
10
0.1
0
.4
.8
1.2
1.6
2.0
FORWARD VOLTAGE,(V)
1
1
10
REVERSE VOLTAGE,(V)
100
FIG.2 - TYPICAL DIODE CAPACITANCE
3.5
FIG.4 - REVERSE CURRENT
VS JUNCTION TEMPERATURE
10
3
3.0
DIODE CAPACITANCE,(pF)
REVERSE CURRENT, (uA)
2.5
2.0
1.5
1.0
0.5
0
10
2
=
V
R
10
/
75V
MA
X
AL
.V
UE
S
1
V
R
10
-1
5V
=7
/T
UE
AL
.V
YP
S
=
V
R
V
20
/T
LU
VA
.
YP
ES
0.1
1
10
100
1000
REVERSE VOLTAGE,(V)
10
-2
0
100
200
o
JUNCTION TEMPERATURE ( C)
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/02/10
Revised Date
2010/03/10
Revision
B
Page.
7
Page 3
DS-221925
SMD Switching Diode
1N4448WS
Pinning information
Pin
Pin1
Pin2
cathode
anode
Simplified outline
Formosa MS
Symbol
1
2
1
2
Marking
Type number
1N4448WS
Marking code
T5
Suggested solder pad layout
C
A
B
Dimensions in inches and (millimeters)
PACKAGE
SOD-323F
A
0.033 (0.83)
B
0.025 (0.63)
C
0.063 (1.60)
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/02/10
Revised Date
2010/03/10
Revision
B
Page.
7
Page 4
DS-221925
SMD Switching Diode
1N4448WS
Packing information
P
0
P
1
d
E
F
B
W
Formosa MS
A
P
D
2
T
C
D
W
1
D
1
unit:mm
Item
Symbol
Tolerance
SOD-323F
Carrier width
Carrier length
Carrier depth
Sprocket hole
13" Reel outside diameter
13" Reel inner diameter
7" Reel outside diameter
7" Reel inner diameter
Feed hole diameter
Sprocket hole position
Punch hole position
Punch hole pitch
Sprocket hole pitch
Embossment center
Overall tape thickness
Tape width
Reel width
A
B
C
d
D
D
1
D
D
1
D
2
E
F
P
P
0
P
1
T
W
W
1
0.1
0.1
0.1
0.1
2.0
min
2.0
min
0.5
0.1
0.1
0.1
0.1
0.1
0.1
0.3
1.0
1.46
2.95
1.25
1.50
-
-
178.00
62.00
13.00
1.75
3.50
4.00
4.00
2.00
0.23
8.00
11.40
Note:Devices are packed in accor dance with EIA standar RS-481-A and specifications listed above.
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/02/10
Revised Date
2010/03/10
Revision
B
Page.
7
Page 5
DS-221925
微控制器 MCU
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