Small Signal Switching Diodes
Reverse Voltage: 75 Volts
Forward Current: 150 mA
RoHS Device
Page 1
REV:D
Features
-Design for mounting on small surface.
-High speed switching.
-High mounting capability, strong surge
withstand, high reliability.
Mechanical data
-Case: SOT-23, molded plastic.
-Terminals: solderable per MIL-STD-750,
method 2026.
-Approx. weight: 0.0078 grams
Circuit diagram
CDST-4148-G
Maximum Ratings and Electrical Characteristics, Single Diode
(at Ta=25°C unless otherwise noted)
QW-B0001
Comchip Technology CO., LTD.
Peak Repetitive peak reverse voltage
Units
Symbol
Parameter
VRRM
IO
1 2
3
Conditions
T=1.0 μS
V
mA
Dimensions in inches and (millimeter)
SOT-23
3
1 2
0.118(3.00)
0.110(2.80)
0.055(1.40)
0.047(1.20)
0.079(2.00)
0.071(1.80)
0.041(1.05)
0.035(0.90)
0.020(0.50)
0.012(0.30)
0.006(0.15)
0.003(0.08)
0.100(2.55)
0.089(2.25)
0.004(0.10) max
0.012(0.30)
VDC
Peak forward surge current A
IFSM
DC Blocking voltage
75
Average forward current 150
2.0
Forward voltage VF
@IF=1mA
@IF=10mA
@IF=50mA
@IF=150mA
0.715
0.855
1.0
1.25
V
Reverse current IR2.5
nA
@VR=20V
@VR=75V
Reverse recovery time
Capacitance between terminals
Junction temperature
Storage temperature
Trr
CT
TJ
TSTG
VR=0V, f=1.0MHz
4
2
+150
nS
pF
°C
°C
PDmW
Power dissipation 350
Reverse breakdown voltage V(BR)R 75 V
IR=100µA
V
25
+150
0.020(0.50)
IF=IR=10mA, 1rr=0.1*IR
RL=100Ω
RMS reverse voltage VRMS V
53
75
T=1.0 S 1.0
mAIFM
Forward continous current
300
Min. Typ. Max.
-65
RθJA °C/W
Thermal resistance junction to ambient 357
μA
QW-B0001
RATING AND CHARACTERISTIC CURVES (CDST-4148-G)
Forward Voltage, (V)
1.51.00.50
Fig.1 - Forward Characteristics
1
10
100
1000
Reverse Voltage, (V)
0
Fig.3 - Reverse Characteristics
0.1n
Reverse Current, (A)
1n
10n
100n
10μ
40
Reverse Voltage, (V)
0
Fig.4 - Capacitance Between Terminals
Characteristics
0
Total Capacitance, (pF)
1
2
30 50
Ambient Temperature, (°C)
Fig.2 - Power Derating Curve
0
Power Dissipation, (mW)
200
400
Comchip Technology CO., LTD.
Page 2
REV:D
60 100
0 100 175
20 80
100
10
25 50 75 150125
300
1μ
4020
Mounted on glass
epoxy PCBs
Small Signal Switching Diodes
TA=150°C
TA=-40°C
TA=25°C
TA=75°C
TA=125°C
TA=-40°C
TA=25°C
TA=75°C
TJ=25°C
f=1.0MHz
TA=0°C
TA=150°C
TA=0°C
Instantaneous Forward Voltage, (V)
0
Fig.5 - Forward Characteristics
0.01
Instantaneous Forward Current, ( mA)
0.1
1.0
10
1000
1 2
100
Junction Temperature, (°C)
0
1
Leakage Current, ( nA)
10
100
10000
100 200
1000
Fig.6 - Leakage Current vs Junction
Temperature
Forward Current, (mA)
QW-B0001
Comchip Technology CO., LTD.
Page 3
REV:D
Small Signal Switching Diodes
B C dD D2D1
SOT-23
SYMBOL
A
(mm)
(inch) 2.142 ± 0.016
4.00 ± 0.10
1.50 + 0.10 54.40 ± 0.40 13.00 ± 0.20
4.00 ± 0.10 2.00 ± 0.10
178 ± 1.00
0.059 0.004+7.008 ± 0.039 0.512 ± 0.008
SYMBOL
(mm)
(inch) 0. ± 0.004158 0.158 ± 0.004 0.079 ± 0.004
E F P P0P1W W1
1.75 ± 0.10
0.069 ± 0.004
3.50 ± 0.05
0.138 ± 0.002
SOT-23
3.15 ± 0.10
0.124 ± 0.004
2.77 ± 0.10
0.109 ± 0.004
1.22 ± 0.10
0.048 ± 0.004
9.50 ± 1.00
0.374 ± 0.039
8.00 0.30 /+–0.10
0.315 0.012 /+–0.004
Reel Taping Specification
o
120
Trailer Device Leader
10 pitches (min)10 pitches (min)
.......
.......
....... ..............
....... ..............
End Start
D1
D2
D
W1
T
C
Direction of Feed
Index hole
d
E
F
B W
P
P0
P1
A
QW-B0001
Comchip Technology CO., LTD.
Page 4
REV:D
Small Signal Switching Diodes
Marking Code
XXX
3
1 2
Suggested PAD Layout
A
C
B
SIZE
(inch)
0.031
(mm)
0.80
1.90
2.02
0.075
0.080
SOT-23
2.82 0.111
A
B
C
D
D
xxx = Product type marking code
Part Number Marking Code
CDST-4148-G K A2
Case Type
SOD-23 3,000
REEL
( pcs )
Reel Size
(inch)
7
REEL PACK
Standard Packaging
