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Features
Low Forward Voltage Drop
Guard Ring Construction for Transient Protection
High Conductance
Lead Free By Design/RoHS Compliant (Note 3)
"Green" Device (Note 4)
B0540WS
SURFACE MOUNT SCHOTTKY BARRIER RECTIFIER
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Mechanical Data
Case: SOD-323
Case Material: Molded Plastic, "Green" Molding Compound.
UL Flammability Rating Classification 94V-0
Moisture Sensitivity: Level 1 per J-STD-020D
Polarity: Cathode Band
Terminals: Finish - Matte Tin Annealed Over Alloy 42
leadframe. Solderable per MIL-STD-202, Method 208
Marking Information: See Page 2
Ordering Information: See Page 2
Weight: 0.004 grams (approximate)
Top View
Maximum Ratings @TA = 25°C unless otherwise specified
Single phase, half wave, 60Hz, resistive or inductive load.
For capacitance load, derate current by 20%.
Characteristic
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
RMS Reverse Voltage
Average Rectified Output Current
Non-Repetitive Peak Forward Surge Current
8.3ms single half sine-wave superimposed on rated load
Symbol
VRRM
VRWM
VR
VR(RMS)
IO
IFSM
Value
40
28
0.5
3
Unit
V
V
A
A
Thermal Characteristics
Characteristic
Power Dissipation (Note 1)
Typical Thermal Resistance Junction to Ambient (Note 1)
Operating and Storage Temperature Range
Symbol
PD
RθJA
TJ, TSTG
Value
235
426
-40 to +125
Unit
mW
°C/W
°C
Electrical Characteristics @TA = 25°C unless otherwise specified
Characteristic
Reverse Breakdown Voltage (Note 2)
Forward Voltage
Reverse Current (Note 2)
Total Capacitance
Symbol Min Typ Max Unit
Test Condition
V(BR)R 40 ⎯ ⎯
V IR = 1mA
VF
285 300
480 550
mV IF = 10mA
IF = 500mA
IR
1.0
2.0
3
5
μA VR = 10V
μA VR = 30V
CT
125
20
pF VR = 0V, f = 1.0MHz
pF VR = 10V, f = 1.0MHz
Notes: 1. Part mounted on FR-4 PC board with recommended pad layout, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
2. Short duration pulse test used to minimize self-heating effect.
3. No purposefully added Lead.
www.DataSheet44.UD.cioodmes Inc.'s "Green" policy can be found on our website at http://www.diodes.com/products/lead_free/index.php.
B0540WS
Document number: DS30524 Rev. 8 - 2
1 of 3
www.diodes.com
May 2008
© Diodes Incorporated

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1,000
100
10
1
.1
.01
.001
0
0.10 0.20 0.30 0.40 0.50 0.60
VF, INSTANTANEOUS FORWARD VOLTAGE (V)
Fig. 1 Typical Forward Characteristics
1,000
10m
1m
B0540WS
TA = 125°C
TA = 75°C
TA = 25°C
0 5.0 10 15 20 25 30 35 40
VR, INSTANTANEOUS REVERSE VOLTAGE (V)
Fig. 2 Typical Reverse Characteristics
1.0
0.75
100 0.50
0.25
10
0
5 10
15 20
25
VR, DC REVERSE VOLTAGE (V)
Fig. 3 Total Capacitance vs. Reverse Voltage
0
0 25 50 75 100 125 150
TT, TERMINAL TEMPERATURE (°C)
Fig. 4 Forward Current Derating Curve
Ordering Information (Note 5)
Notes:
Part Number
B0540WS-7
Case
SOD-323
5. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Packaging
3000/Tape & Reel
Marking Information
www.DataSheet4U.com
SF SF = Product Type Marking Code
B0540WS
Document number: DS30524 Rev. 8 - 2
2 of 3
www.diodes.com
May 2008
© Diodes Incorporated

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Package Outline Dimensions
C
H
B
A
MK
L
SOD-323
Dim Min Max
A 0.25 0.35
B 1.20 1.40
C 2.30 2.70
H 1.60 1.80
J 0.00 0.10
K 1.0 1.1
J L 0.20 0.40
M 0.10 0.15
α 0° 8°
All Dimensions in mm
B0540WS
Suggested Pad Layout
X
Y
C
G
Z
Dimensions
Z
G
X
Y
C
Value (in mm)
3.75
1.05
0.65
1.35
2.40
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product
described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall
assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website,
harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written
approval of the President of Diodes Incorporated.
www.DataSheet4U.com
B0540WS
Document number: DS30524 Rev. 8 - 2
3 of 3
www.diodes.com
May 2008
© Diodes Incorporated