WEITRON
Surface Mount Switching Diode
P b
Lead(Pb)-Free
Features:
* Fast Switching Speed
* Surface Mount Package Ideally Suited for Automatic Insertion
* For General Purpose Switching Applications
* High Conductance
Mechanical Data:
* Case: SOD-323, Molded Plastic
* Terminals: Plated Leads Solderable per MIL-STD-202, Method 208
* Polarity: Cathode Band
* Weight: 0.004 grams (approx)
MMBL4448H
1N4448WS
SWITCHING DIODE
250m AMPERES
100 VOLTS
1
2
SOD-323
SOD-323 Outline Dimensions
Unit:mm
Dim
A
B
C
D
E
H
J
K
MILLMETERS
Min
Max
1.60
1.80
1.35
1.15
1.00
0.80
0.40
0.25
0.15REF
0.10
0.00
0.089 0.377
2.30
2.70
PIN 1. CATHODE
2. ANODE
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MMBL4448H
1N4448WS
Maximum Ratings
(T
A
=25°C Unless Otherwise note)
Rating
Non-Repetitive Peak Reverse Voltage
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Vlotage
RMS Reverse Voltage
Forward Continuous Current
Average Recfified Output Current
Non-Repetitive Peak Forward Surge Current
@ t=1.0µs
@ t=1.0s
Total Device Dissipation
Thermal Resistance Junction to Ambient
Junction and Storage Temperature
Storage Temperature
WEITRON
Symbol
V
RM
V
RRM
V
RWM
V
R
V
R(RMS)
I
FM
I
O
I
FSM
P
D
R
θJA
T
J
T
stg
Value
100
75
53
500
250
4.0
2.0
200
315
+150
-65 to +150
Unit
V
V
V
mA
mA
A
mW
K/W
°C
°C
Electrical Characteristics
(T
A
=25˚C Unless Otherwise note)
Characterictics
Symbol
Min
Max
Unit
Off Characteristics
Reverse Voltage Leakage Current
I
R
=10µA
Forward Voltage
IF=5mA
IF=10mA
IF=100mA
IF=150mA
V
(BR)R
75
0.62
-
-
-
-
-
-
-
0.72
0.855
1.00
1.25
2.5
25
4.0
4.0
V
V
F
V
Reverse Voltage Leakage Current
V
R
=75V
V
R
=20V
Diode Capacitance
V
R
=0, f=1.0MHz
Revarse Recover Time
I
F
=I
R
=10mA, Irr=0.1 x I
R
, R
L
=100Ω
I
R
C
T
t
rr
µA
nA
pF
ns
Device Marking
Item
1N4448WS , MMBL4448H
Marking
T5
Eqivalent Circuitdiagram
1
2
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WEITRON
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MMBL4448H
1N4448WS
WEITRON
100
Typical Characteristics
300
P
d
,
POWER DISSIPATION (mW)
I
F
, FORWARD CURRENT (mA)
200
10
Ta = 25
°
C
Ta = 50
°
C
100
Ta = 85
°
C
1
Ta = 0
°
C
Ta = -30
°
C
0
0
25
50
75
125
125
150
0.1
0
200
400
600
800
1000
AMBIENT TEMPERATURE (
°
C)
Fig. 1 Forward Current Derating Curve
10.0
2.5
V
F
, FORWARD VOLTAGE (mV)
Fig. 2 Typical Forward Characteristics
t
rr
, REVERSE RECOVERY TIME (nS)
1.0
Ta = 100
°
C
Ta = 75
°
C
2.0
1.5
0.10
Ta = 50
°
C
Ta = 25
°
C
Ta = 0
°
C
Ta = -30
°
C
1.0
0.01
0.5
0.001
0
0
0
20
40
60
80
2
4
6
8
10
V
R
, REVERSE VOLTAGE (V)
Fig. 3 Typical Reverse Characteristics
4
I
F
, FORWARD CURRENT (mA)
Fig. 4 Reverse Recovery Time vs.
Forward Current
f = 1MHz
C
T
, TOTAL CAPACITANCE (pF)
3
2
1
0
0
1
2
3
4
5
6
V
R
, REVERSE VOLTAGE (V)
Fig. 5 Total Capacitance vs.
Reverse Voltage
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WEITRON
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