Surface Mount Switching Diode
*High Speed 4ns
*Low Rever Leakage Current
*Small Outline Surface Mount SOT-23 Package
Features:
MMBD4148C/A/S
WEITRON
WEITRON
http://www.weitron.com.tw
SWITCHING DIODE
200mAMPERS
100VOLTS
SOT-23 Outline Dimensions
SOT-23
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
EG
M
L
H
J
TOP VIEW
K
C
1
2
3
MMBD4148C/A/S
WEITRON
W E IT R O N
Maximum Ratings
Rating Symbol Value Unit
Reverse Voltage
Forward Current
Forward Surge Current
VR
IF
100
200
Vdc
mAdc
Adc
Device Marking
Item Marking Eqivalent Circuitdiagram
MMBD4148C A4
Off Characteristics
Reverse Breakdown Votalge
(IR=100µAdc)
Forward Voltage(IF=10mAdc)
Reverse Voltage
Leakage Current
(VR=20Vdc)
(VR=75Vdc)
Revarse Recover Time
(IF=IR=10mAdc)
V(BR)
VF
IR
Diode Capacitance
(VR=0, f=1.0MHz) CT
trr
100
1000
0.025
5.0
4.0
4.0
Vcc
mVdc
µAdc
F
ns
1. FR-5=1.0x0.75x0.062 in 2.Alumina=0.4x0.3x0.024 in. 99.5% alumina.
Electrical Characteristics
(TA=25 C Unless Otherwise note)
Characterictics Symbol Max UnitMin
http://www.weitron.com.tw
T her mal C har acter istics
Characterictics Symbol Max Unit
Total Device Dissipation FR-5
Board TA=25 C
Thermal Resistance, Junction
to Ambient
Junction and Storage
Temperature
PD
R JA
TJ, Tstg
556
-55 to + 150
mW
C/W
C
500
q
P
Non-Repetitive Peak
@t=1.0us
@t=1.0s FSM
I
2.0
1.0
MMBD4148A
MMBD4148S
A1
A7
1
32
31
2
31
2
MMBD4148C/A/S
VR, REVERSE VOLTAGE (VOLTS)
Figure 4. Capacitance
CD, DIODE CAPACITANCE (pF)
0 2 4 6 8
0.68
0.64
0.60
0.56
0.52
WEITRON
W E IT R O N
http://www.weitron.com.tw
TA=85 C
TA= -40 C
TA=25 C
0.2 0.4 0.6 0.8 1.0 1.2
VF, FORWARD VOLTAGE (VOLTS)
Figure 2. Forward Voltage
IF, FORWARD CURRENT (mA)
100
10
1.0
0.1
TA=125 C
TA=85 C
TA=55 C
TA=25 C
TA=150 C
0 10 20 30 40 50
VR, REVERSE VOLTAGE (VOLTS)
Figure 3. Leakage Current
IR, REVERSE CURRENT (µA)
0.001
0.01
0.1
1.0
10
+10V
820
2.0K
100 µH
0.1µF
50 OUTPUT
PULSE
GENERATOR
50 INPUT
SAMPLING
OSCILLOSCOPE
IF
D.U.T.
0.1µF
VRINPUT SIGNAL
trtp
10%
90%
tIF
IR
trr t
IR(REC)=1.0mA
OUTPUT PULSE
(IF=IR=10mA, MEASURED
AT IR(REC)=1.0mA
Notes:1. A 2.0 k variable resistor for a Forward Current (IF) 0f 10 mA
2. Input pules is adjusted so IR(peak) is equal to 10 mA
3. tp trr
Figure 1. Recovery Time Equivalent Test Circuit
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