40CTQ045
Vishay High Power Products
Schottky Rectifier, 2 x 20 A
FEATURES
•
•
•
•
•
150 °C TJ operation
Center tap configuration
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
Base 2
common
cathode
Anode
TO-220AB
Anode
2
1 Common 3
cathode
DESCRIPTION
This 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
VR
45 V
MAJOR RATINGS AND CHARACTERISTICS
SYMBOL
IF(AV)
CHARACTERISTICS
VALUES
UNITS
40
A
45
V
Rectangular waveform
VRRM
IFSM
tp = 5 µs sine
1240
A
VF
20 Apk, TJ = 125 °C (per leg)
0.48
V
TJ
Range
- 55 to 150
°C
40CTQ045
UNITS
45
V
VOLTAGE RATINGS
PARAMETER
SYMBOL
Maximum DC reverse voltage
VR
Maximum working peak reverse voltage
VRWM
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
per leg
Maximum average forward current
See fig. 5
per device
IF(AV)
TEST CONDITIONS
50 % duty cycle at TC = 116 °C, rectangular waveform
VALUES
UNITS
20
40
A
Maximum peak one cycle non-repetitive
surge current per leg
See fig. 7
IFSM
Non-repetitive avalanche energy per leg
EAS
TJ = 25 °C, IAS = 3 A, L = 4.4 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
3
A
Document Number: 93340
Revision: 21-Aug-08
5 µs sine or 3 µs rect. pulse
10 ms sine or 6 ms rect. pulse
Following any rated load
condition and with rated
VRRM applied
For technical questions, contact: diodes-tech@vishay.com
1240
350
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1
40CTQ045
Schottky Rectifier, 2 x 20 A
Vishay High Power Products
ELECTRICAL SPECIFICATIONS
PARAMETER
SYMBOL
TEST CONDITIONS
20 A
Maximum forward voltage drop per leg
See fig. 1
VFM (1)
TJ = 25 °C
40 A
20 A
TJ = 125 °C
40 A
Maximum reverse leakage current per leg
See fig. 2
IRM (1)
Threshold voltage
VF(TO)
Forward slope resistance
rt
Maximum junction capacitance per leg
CT
Typical series inductance per leg
LS
Maximum voltage rate of change
Note
(1) Pulse width < 300 µs, duty cycle < 2 %
dV/dt
TJ = 25 °C
VR = Rated VR
TJ = 125 °C
TJ = TJ maximum
VR = 5 VDC (test signal range 100 kHz to 1 MHz) 25 °C
Measured lead to lead 5 mm from package body
Rated VR
VALUES
UNITS
0.53
0.68
V
0.48
0.67
3
115
mA
0.27
V
8.72
mΩ
2800
pF
8.0
nH
10 000
V/µs
VALUES
UNITS
- 55 to 150
°C
THERMAL - MECHANICAL SPECIFICATIONS
PARAMETER
SYMBOL
Maximum junction and storage
temperature range
TEST CONDITIONS
TJ, TStg
Maximum thermal resistance,
junction to case per leg
2.0
RthJC
Maximum thermal resistance,
junction to case per package
DC operation
Typical thermal resistance,
case to heatsink
RthCS
Mounting surface, smooth and greased
Marking device
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2
0.50
2
Approximate weight
Mounting torque
°C/W
1.0
g
0.07
oz.
minimum
6 (5)
kgf · cm
maximum
12 (10)
(lbf · in)
Case style TO-220AB
For technical questions, contact: diodes-tech@vishay.com
40CTQ045
Document Number: 93340
Revision: 21-Aug-08
40CTQ045
1000
1000
IR - Reverse Current (mA)
IF - Instantaneous Forward Current (A)
Schottky Rectifier, 2 x 20 A Vishay High Power Products
100
TJ = 150 °C
TJ = 125 °C
TJ = 25 °C
10
1
TJ = 150 °C
100
TJ = 125 °C
10
TJ = 100 °C
1
TJ = 75 °C
TJ = 50 °C
0.1
TJ = 25 °C
0.01
0.001
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0
5
10
15
20
25
30
35
40
45
VFM - Forward Voltage Drop (V)
VR - Reverse Voltage (V)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
(Per Leg)
Fig. 2 - Typical Values of Reverse Current vs.
Reverse Voltage (Per Leg)
CT - Junction Capacitance (pF)
10 000
TJ = 25 °C
1000
100
20
10
0
40
30
50
ZthJC - Thermal Impedance (°C/W)
VR - Reverse Voltage (V)
Fig. 3 - Typical Junction Capacitance vs.
Reverse Voltage (Per Leg)
10
1
0.1
0.01
0.00001
Single pulse
(thermal resistance)
0.0001
0.001
PDM
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
t1
t2
Notes:
1. Duty factor D = t1/t2 .
2. Peak TJ = PDM x ZthJC + TC
0.01
0.1
1
10
100
t1 - Rectangular Pulse Duration (s)
Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics (Per Leg)
Document Number: 93340
Revision: 21-Aug-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
3
40CTQ045
Schottky Rectifier, 2 x 20 A
150
18
145
16
Average Power Loss (W)
Allowable Case Temperature (°C)
Vishay High Power Products
140
DC
135
130
125
Square wave (D = 0.50)
80 % rated VR applied
120
115
110
14
12
RMS limit
10
8
6
4
DC
2
See note (1)
105
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
100
0
0
5
10
15
25
20
30
5
0
10
15
20
25
30
IF(AV) - Average Forward Current (A)
Fig. 6 - Forward Power Loss Characteristics (Per Leg)
IFSM - Non-Repetitive Surge Current (A)
IF(AV) - Average Forward Current (A)
Fig. 5 - Maximum Allowable Case Temperature vs.
Average Forward Current (Per Leg)
10 000
At any rated load condition
and with rated VRRM applied
following surge
1000
100
10
100
1000
10 000
tp - Square Wave Pulse Duration (µs)
Fig. 7 - Maximum Non-Repetitive Surge Current (Per Leg)
L
D.U.T.
IRFP460
Rg = 25 Ω
Current
monitor
High-speed
switch
Freewheel
diode
+ Vd = 25 V
40HFL40S02
Fig. 8 - Unclamped Inductive Test Circuit
Note
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 = 10 V
(1)
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4
For technical questions, contact: diodes-tech@vishay.com
Document Number: 93340
Revision: 21-Aug-08
40CTQ045
Schottky Rectifier, 2 x 20 A Vishay High Power Products
ORDERING INFORMATION TABLE
Device code
40
C
T
Q
045
-
1
2
3
4
5
6
1
-
Current rating (40 = 40 A)
2
-
Circuit configuration:
C = Common cathode
3
-
Package:
T = TO-220
4
-
Schottky “Q” series
5
-
Voltage rating (045 = 45 V)
6
-
None = Standard production
PbF = Lead (Pb)-free
Tube standard pack quantity: 50 pieces
LINKS TO RELATED DOCUMENTS
Dimensions
http://www.vishay.com/doc?95222
Part marking information
http://www.vishay.com/doc?95225
Document Number: 93340
Revision: 21-Aug-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
5
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
www.vishay.com
1
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