SMD Switching Diode
SMD Diodes Specialist
Page 1
QW-A0034
REV:A
High Speed
Features
Designed for mounting on small surface.
Extremely thin/leadless package.
High mounting capability, strong surge
withstand, high reliability.
Mechanical data
Case: 0402(1005) standard package,
molded plastic.
Terminals: Gold plated, solderable per
MIL-STD-750,method 2026.
Mounting position: Any
Weight: 0.001 gram(approx.).
Marking Code: Cathode band & S3
CDSQR4148 (RoHS Device)
O
Electrical Characteristics (at TA=25 C unless otherwise noted)
nS
PF
nA
uA
V
4
4
25
2.5
1.0
CT
IR
VF
Trr
Capacitance between terminals
Reverse current
Forward voltage
Reverse recovery time
Parameter Conditions Symbol Min Typ
Max
Unit
f = 1 MHZ,and 0VDC reverse voltage
VR = 20 V
VR = 75 V
IF = 50 mA DC
IF = = 10 mA, RL =100 ohms, Irr = 1mAIR
A
mA
V
V
4
1
150
75
100
IO
VR
VRRM
IFSM
O
Maximum Rating (at TA=25 C unless otherwise noted)
TP = 1uS
TP = 1mS
mA
300
Repetitive peak forward current
Average forward current
Reverse voltage
Repetitive peak reverse voltage
Forward current,surge peak
Parameter Conditions Symbol Min Typ
Max
Unit
OC
OC
+125
+125
-40
TSTG
Tj
Storage temperature
Junction temperature
mW
125
PD
Power Dissipation
IFRM
0.041(1.05)
0.037(0.95)
0.026(0.65)
0.022(0.55)
0402(1005)
Dimensions in inches and (millimeter)
0.020(0.50) Typ.
0.022(0.55)
0.018(0.45)
0.012(0.30) Typ.
Comchip Technology CO., LTD.
SMD Switching Diode
SMD Diodes Specialist
Page 2
QW-A0034
REV:A
RATING AND CHARACTERISTIC CURVES (CDSQR4148)
Forward current (mA )
Reverse voltage (V)
Reverse current ( A )
0.2 0.4 0.8 1.4
0 1.00.6
100n
0.1n
1000
10
100 1u
10u
10n
1n
1.2
1
0.1
0.01
0 10 90 10020 30 40 50 60 70 80
1.81.6
Reverse voltage : (V)
Capacitance between terminals : (pF)
0510 15 20 25 30 35
0
1.0
2.0
3.0
4.0
5.0
f=1MHz
O
Ta = 25 C
Ambient temperature ( C)
Forward voltage (V)
Average forward current ( % )
0
20
40
60
80
100
0 25 50 75 100 125 150
Mounting on glass epoxy PCBs
Fig. 1 - Forward characteristics Fig. 2 - Reverse characteristics
Fig. 4 - Current derating curve
Fig. 3 - Capacitance between
terminals characteristics
O
125C
O
75 C
O
25 C
O
-25C
O
-25 C
O
25 C
O
75 C
O
125 C
Comchip Technology CO., LTD.
SMD Switching Diode
SMD Diodes Specialist
Page 3
QW-A0034
REV:A
Comchip Technology CO., LTD.
Index hole
o
120
Trailer Device Leader
10 pitches (min)10 pitches (min)
.......
.......
....... ..............
....... ..............
End Start
d
E
F
B W
A
P
P0
P1
D1
D2
D
W1
T
C
Direction of Feed
Reel Taping Specification
Polarity
BCdD D2
D1
E F P P0P1T
QR/0402
SYMBOL
A
W W1
(mm)
(inch) 0.031 0.004±0.051 0.004±0.022 0.004±0.061 + 0.004 7.008 0.04±2.362 MIN. 0.512 0.008±
QR/0402
SYMBOL
(mm)
(inch) 0.069 0.004±0.138 0.002±0.157 0.004±0.157 0.004±0.079 0.004±0.009 0.002±0.315 0.008±0.531 MAX.
0.80 0.10± 1.30 0.10±
4.00 0.10±
1.55 + 0.10
3.50 0.05±1.75 0.10±
60.0 MIN. 13.0 0.20±0.55 0.10±
4.00 0.10± 2.00 0.10± 0.22 0.05± 8.00 0.20± 13.5 MAX.
178 1±
SMD Switching Diode
SMD Diodes Specialist
Page 4
QW-A0034
REV:A
Comchip Technology CO., LTD.
S3
Park Number
CDSQR4148
Marking Code
S3
Marking Code
Suggested PAD Layout
SIZE
(inch)
0.030
(mm)
0.750
0.500
0.700
0.020
0.028
QR/0402
1.250 0.049
E0.250 0.010
Standard Package
Case Type
Qty per Reel
(Pcs)
5000
QR/0402
Reel Size
(inch)
7
A
B
C
D
A
C
B
E
D
