B345A
SURFACE MOUNT
SCHOTTKY BARRIER RECTIFIERS
REVERSE VOLTAGE –
45
Volts
FORWARD CURRENT –
3.0
Amperes
FEATURES
• For surface mounted applications
• Metal-Semiconductor junction with guard ring
• Epitaxial construction
• Very Low forward voltage drop
• High current capability
• Plastic material has UL flammability classification 94V-0
• For use in low voltage, high frequency inverters, free
wheeling, and polarity protection application
• IEC 61000-4-2, level 4 (ESD). > 15KV (air)
MECHANICAL DATA
• Case: Molded plastic
• Polarity: Indicated by cathode band
• Weight:0.002 ounces, 0.064 grams
SMA
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
°C
ambient temperature unless otherwise specified.
CHARACTERISTICS SYMBOL
B345A UNIT
Maximum Repetitive Peak Reverse Voltage V
RRM
45 V
Maximum RMS Voltage V
RMS
32 V
Maximum DC Blocking Voltage VDC 45 A
Maximum Average Forward
Rectified Current @TC=80°C
I
AV
3.0 A
Peak Forward Surge 8.3ms single half sine-wave
superimposed on rated load(JEDEC METHOD) I
FSM
80 A
Maximum Instantaneous
Forward Voltage @IF=3.0A;Tj=25°C V
F
0.55 V
Maximum DC Reverse
Current at Rated DC
Blocking Voltage
@VR=45V;Tj=25°C
@VR=45V;Tj=100°C
I
R
0.15
25
mA
Typical Junction Capacitance (Note 1) Cj 200 pF
Typical Thermal Resistance (Note 2) R
Θ
JL
24 °C/W
Operating Junction Temperature Range Tj -55 to +125 °C
Storage Temperature Range T
STG
-55 to +150 °C
Rev.3, Jul-2012, KSHA20
Note :
(1) Measured at 1.0MHz and applied reverse voltage of 4.0V DC...
(2) Thermal Resistance Junction to Lead
RATING AND CHARACTERISTIC CURVES
B345A
FIG.1- FORWARD CURRENT DERATING CURVE
0
0.5
1
1.5
2
2.5
3
3.5
0 25 50 75 100 125
CASE TEMPERATURE, ( ℃)
AVERAGE FORWARD CURRENT, (A)
FIG.2- MAXIMUM NON-REPETITIVE SURGE
CURRE NT
0
10
20
30
40
50
60
70
80
1 10 100
NUMBER OF CYCLES AT 60Hz
FIG.3- TYPICAL JUNCTION CAPACITANCE
10
100
1000
1 10 100
REVERSE VOLT AGE, VOLTAGES
CAPACITANCE, (pF)
FIG.4- TYPICAL FORWARD CHARACTERISTICS
0.01
0.1
1
10
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
INSTANTANEOUS FORWARD VOLTAGE, VOLT S
INST ANTANEOUS FORWARD CURRENT, (A)
FIG.5- TYPICAL REVERSE CHARACTERISTICS
0.001
0.01
0.1
1
10
100
10 30 50 70 90 110
PERCENT OF RAT ED PEAK REVERSE VOLTAGE, (%)
INSTANTANEOUS REVERSE CURRENT, (mA)
FIG.6- DC REVERSE VOLTAGE DE RATING CURVE
0
20
40
60
80
100
120
0 25 50 75 100 125
AMBIENT TEMPERATURE, ( ℃)
PERCENT OF DC REVERSE VOLTAGE, (%)
Tj=125℃
Tj=25℃
Tj=25℃
PULSE WIDTH 300us
2% Duty Cycle
Tj=25℃, f=1MHz
8.3ms Single Half Sine-Wave
Mounted on glass-epoxy
substrate with 1oz/ft
2
_7x5 mm
copper pad.
Mounted on glass-epoxy
substrate with 1oz/ft
2
_7x5 mm
copper pad. Rth j-a in Still-air
=6
5
℃
/W
Tj=125℃
Tj=25℃
Legal Disclaimer Notice
B345A
Important Notice and Disclaimer
LSC reserves the right to make changes to this document and its products and
specifications at any time without notice. Customers should obtain and confirm the latest
product information and specifications before final design, purchase or use.
LSC makes no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does LSC assume any liability for application
assistance or customer product design. LSC does not warrant or accept any liability with
products which are purchased or used for any unintended or unauthorized application.
No license is granted by implication or otherwise under any intellectual property rights of
LSC.
LSC products are not authorized for use as critical components in life support devices or
systems without express written approval of LSC.