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Small Signal Schottky Diodes
COMCHIP
SMD Diodes Specialist
CDBT-40/S/C/A-G
Reverse Voltage: 40 Volts Forward Current: 200 mA RoHS Device
Features
-Design for mounting on small surface. -High speed switching application, circuit protection. -Low forward voltage drop.
0.055(1.40) 0.047(1.20) 0.118(3.00) 0.110(2.80)
SOT-23
3
Mechanical data
-Case: SOT-23, molded plastic. -Terminals: solderable per MIL-STD-750, method 2026. -Approx. weight: 0.0078 grams
0.041(1.05) 0.035(0.90)
1
0.079(2.00) 0.071(1.80)
2
0.006(0.15) 0.002(0.05) 0.100(2.55) 0.089(2.25)
Circuit diagram
3 3 3 3
0.020(0.50) 0.012(0.30) 0.008(0.20) min 0.004(0.10) max
1
2
1
2
1
2
1
2
Dimensions in inches and (millimeter)
CDBT-40-G Marking Code: 43
CDBT-40S-G CDBT-40C-G Marking Code: 44 Marking Code: 45
CDBT-40A-G Marking Code: 46
Maximum Ratings (at Ta=25C unless otherwise noted)
Parameter Peak repetitive peak reverse voltage Working peak reverse voltage DC blocking voltage Forward continuous current Power dissipation Thermal resistance, junction to ambient Junction temperature Storage temperature Symbol VRRM VRWM VR IFM PD RJA TJ TSTG Value Unit
40 200 200 625 125 -65 to +125
V mA mW C/W C C
Electrical Characteristics (at Ta=25C unless otherwise noted)
Parameter Reverse breakdown voltage Reverse voltage leakage current Forward voltage Diode capacitance Reverse recovery time Symbol VBR IR VF CD Trr IR=10A VR=30V IF=1mA IF=40mA VR=0V, f=1.0MHz Irr=1mA, IF=IR=10mA, RL=100 Conditions Min. 40 200 380 1000 5 5 Max. Unit V nA mV pF nS
REV:C
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Comchip Technology CO., LTD.
Small Signal Schottky Diodes
COMCHIP
SMD Diodes Specialist
RATING AND CHARACTERISTIC CURVES (CDBT-40/S/C/A-G)
Fig.1 Forward Characteristics
1000 10000
Fig.2 Reverse Characteristics
TA=125 OC
1000
F o r w a r d C u r rent ( mA)
Rev er s e Curr e nt (n A)
100
TA=75 C
O
TA=125 OC
100
10
TA=-40 C TA=0 OC
O
10
TA=25 OC
1
TA=25 OC TA=75 OC
1
TA=0 OC TA=-40 C
O
0.1 0 0.2 0.4 0.6 0.8 1.0
0.1 0 10 20 30 40 50
Forward Voltage (V)
Reverse Voltage (V)
Fig.3 Capacitance Between Terminals Characteristics
5 240
TJ=25C f=1MHz
Fig.4 Power Derating Curve
Capac i ta n c e Bet w een Te rmin a ls (p F )
Mounted on glass epoxy PCBs
4
200
Power Dissipation(mW)
0 10 20 30 40 50
160
3
120
2
80
1
40
0
0 0 25 50 75 100 125 150
Reverse Voltage (V)
Ambient Temperature (C)
REV:C
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Comchip Technology CO., LTD.
Small Signal Schottky Diodes
Reel Taping Specification
P0 P1 d Index hole E T
COMCHIP
SMD Diodes Specialist
F B P A
W C
12 0
o
D2
D1 D
W1
Trailer ....... .......
10 pitches (min)
Device ....... ....... ....... .......
Leader ....... .......
10 pitches (min)
End
Start
Direction of Feed
SYMBOL
A
3.10 0.10
0.122 0.004
B
2.85 0.10
0.112 0.004
C
1.40 0.10
0.055 0.004
d
1.55 0.10
0.061 0.004
D
178 1
7.008 0.04
D1
50.0 MIN.
1.969 MIN.
D2
13.0 0.20
0.512 0.008
SOT-23
(mm) (inch)
SYMBOL
E
1.75 0.10
0.069 0.004
F
3.50 0.05
0.138 0.002
P
4.00 0.10
0.157 0.004
P0
4.00 0.10
0.157 0.004
P1
2.00 0.05
0.079 0.004
W
8.00 0.30
0.315 0.008
W1
14.4 MAX.
0.567 MAX.
SOT-23
(mm) (inch)
REV:C
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Comchip Technology CO., LTD.
Small Signal Schottky Diodes
Marking Code
3
Part Number CDBT-40-G CDBT-40S-G CDBT-40C-G CDBT-40A-G Marking Code
COMCHIP
SMD Diodes Specialist
43 44 45 46
XX
1 2
xx = Product type marking code
Suggested PAD Layout
SOT-23 SIZE (mm) A B C D 0.80 1.90 2.02 2.82 (inch) 0.031
C D A
0.075 0.080 0.111
B
Standard Package
Qty per Reel Case Type (Pcs) SOT-23 3000 Reel Size (inch) 7
REV:C
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Page 4
Comchip Technology CO., LTD.

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