Document Number: 93452 For technical questions, contact: diodes-tech@vishay.com www.vishay.com
Revision: 21-Aug-08 1
Schottky Rectifier, 2 x 20 A
MBR4045WT
Vishay High Power Products
FEATURES
• 150 °C TJ operation
• Center tap TO-247 package
• Very low forward voltage drop
• High frequency operation
• High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
• Guard ring for enhanced ruggedness and long term
reliability
• Designed and qualified for industrial level
DESCRIPTION
The MBR4045WT center tap Schottky rectifier has been
optimized for very low forward voltage drop, with moderate
leakage. The proprietary barrier technology allows for
reliable operation up to 150 °C junction temperature. Typical
applications are in switching power supplies, converters,
freewheeling diodes, and reverse battery protection.
PRODUCT SUMMARY
IF(AV) 2 x 20 A
VR45 V
IRM 85 mA at 125 °C
TO-247AC
Base
common
cathode
Common
cathode
2
2
13
Anode
1
Anode
2
MAJOR RATINGS AND CHARACTERISTICS
SYMBOL CHARACTERISTICS VALUES UNITS
IF(AV) Rectangular waveform (per device) 40 A
IFRM TC = 125 °C (per leg) 40
VRRM 45 V
IFSM tp = 5 µs sine 1020 A
VF20 Apk, TJ = 125 °C 0.56 V
TJRange - 55 to 150 °C
VOLTAGE RATINGS
PARAMETER SYMBOL MBR4045WT UNITS
Maximum DC reverse voltage VR45 V
Maximum working peak reverse voltage VRWM
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS
Maximum average
forward current
per leg IF(AV) TC = 125 °C, 50 % duty cycle, rectangular waveform 20
A
per device 40
Peak repetitive forward current per leg IFRM Rated VR, square wave, 20 kHz, TC = 125 °C 40
Maximum peak one cycle
non-repetitive surge current per leg
See fig. 7
IFSM
5 µs sine or 3 µs rect. pulse Following any rated load
condition and with rated
VRRM applied
1020
10 ms sine or 6 ms rect. pulse 265
Non-repetitive avalanche energy per leg EAS TJ = 25 °C, IAS = 3 A, L = 4.40 mH 20 mJ
Repetitive avalanche current per leg IAR
Current decaying linearly to zero in 1 µs
Frequency limited by TJ maximum VA = 1.5 x VR typical 3A
www.vishay.com For technical questions, contact: diodes-tech@vishay.com Document Number: 93452
2Revision: 21-Aug-08
MBR4045WT
Vishay High Power Products Schottky Rectifier, 2 x 20 A
Note
(1) Pulse width < 300 µs, duty cycle < 2 %
ELECTRICAL SPECIFICATIONS
PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS
Maximum forward voltage drop VFM (1)
20 A TJ = 25 °C 0.59
V
40 A 0.78
20 A TJ = 125 °C 0.56
40 A 0.72
Maximum instantaneous reverse current IRM (1)
TJ = 25 °C
Rated DC voltage
1.75
mATJ = 100 °C 50
TJ = 125 °C 85
Threshold voltage VF(TO) TJ = TJ maximum 0.29 V
Forward slope resistance rt10.3 mΩ
Maximum junction capacitance CTVR = 5 VDC (test signal range 100 kHz to 1 MHz) 25 °C 900 pF
Typical series inductance LSMeasured from top of terminal to mounting plane 7.5 nH
Maximum voltage rate of change dV/dt Rated VR10 000 V/µs
THERMAL - MECHANICAL SPECIFICATIONS
PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS
Maximum junction temperature range TJ- 55 to 150 °C
Maximum storage temperature range TStg - 55 to 175
Maximum thermal resistance,
junction to case per package RthJC DC operation 1.4
°C/W
Typical thermal resistance,
case to heatsink RthCS Mounting surface, smooth and greased 0.7
Approximate weight 6g
0.21 oz.
Mounting torque minimum 6 (5) kgf · cm
(lbf · in)
maximum 12 (10)
Device marking Case style TO-247AC (JEDEC) MBR4045WT
Document Number: 93452 For technical questions, contact: diodes-tech@vishay.com www.vishay.com
Revision: 21-Aug-08 3
MBR4045WT
Schottky Rectifier, 2 x 20 A Vishay High Power Products
Fig. 1 - Maximum Forward Voltage Drop Characteristics Fig. 2 - Typical Values of Reverse Current vs.
Reverse Voltage
Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage
Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics
1
100
10
1000
IF - Instantaneous
Forward Current (A)
VFM - Forward Voltage Drop (V)
0.4 0.8 1.2 1.6 2.0
0
TJ = 150 °C
TJ = 125 °C
TJ = 25 °C
0.001
1
10
100
0.1
0.01
1000
I
R
- Reverse Current (mA)
V
R
- Reverse Voltage (V)
10 20 40 50
30
0
TJ = 150 °C
TJ = 125 °C
TJ = 100 °C TJ = 75 °C
TJ = 50 °C TJ = 25 °C
100
1000
C
T
- Junction Capacitance (pF)
V
R
- Reverse Voltage (V)
10 20 30 50
40
0
TJ = 25 °C
0.01
0.1
1
10
0.00001 0.0001 0.001 0.01 0.1 1
t1 - Rectangular Pulse Duration (s)
ZthJC - Thermal Impedance (°C/W)
100 10
Single pulse
(thermal resistance)
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
PDM
t1
t2
Notes:
1. Duty factor D = t1/t2
2. Peak TJ = PDM x ZthJC + TC
www.vishay.com For technical questions, contact: diodes-tech@vishay.com Document Number: 93452
4Revision: 21-Aug-08
MBR4045WT
Vishay High Power Products Schottky Rectifier, 2 x 20 A
Fig. 5 - Maximum Allowable Case Temperature vs.
Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
Fig. 8 - Unclamped Inductive Test Circuit
Note
(1) Formula used: TC = TJ - (Pd + PdREV) x RthJC;
Pd = Forward power loss = IF(AV) x VFM at (IF(AV)/D) (see fig. 6);
PdREV = Inverse power loss = VR1 x IR (1 - D); IR at VR1 = Rated VR
80
100
120
140
160
Allowable Case Temperature (°C)
I
F
(
AV
)
- Average Forward Current (A)
10 5 15 20
3025
0
DC
See note (1)
Square wave (D = 0.50)
Rated VR applied
0
15
10
5
20
Average Power Loss (W)
I
F(AV)
- Average Forward Current (A)
1051520
3025
0
DC
RMS limit
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
100
1000
IFSM - Non-Repetitive
Surge Current (A)
tp - Square Wave Pulse Duration (µs)
100 1000 10 000
10
At any rated load condition
and with rated VRRM applied
following surge
Current
monitor
High-speed
switch
D.U.T.
Rg = 25 Ω
+
Freewheel
diode Vd = 25 V
L
IRFP460
40HFL40S02
Document Number: 93452 For technical questions, contact: diodes-tech@vishay.com www.vishay.com
Revision: 21-Aug-08 5
MBR4045WT
Schottky Rectifier, 2 x 20 A Vishay High Power Products
ORDERING INFORMATION TABLE
1- Schottky MBR series
2- Current rating (40 = 40 A)
3- Voltage rating (45 = 45 V)
4-
5- None = Standard production
PbF = Lead (Pb)-free
Circuit configuration:
Center tap (dual) TO-247
Device code
51324
MBR 40 45 WT -
LINKS TO RELATED DOCUMENTS
Dimensions http://www.vishay.com/doc?95223
Part marking information http://www.vishay.com/doc?95226
SPICE model http://www.vishay.com/doc?95297
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
Disclaimer
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All product specifications and data are subject to change without notice.
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or in any other disclosure relating to any product.
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therein, which apply to these products.
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