20CTQ... Series
Vishay High Power Products
Schottky Rectifier, 2 x 10 A
FEATURES
• 175 °C TJ operation
Base 2
common
cathode
• Center tap TO-220 package
• Low forward voltage drop
• High frequency operation
• High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Anode
TO-220AB
• Guard ring for enhanced ruggedness and long term
reliability
• Designed and qualified for industrial level
Anode
2
1 Common 3
cathode
DESCRIPTION
The 20CTQ... center tap Schottky rectifier series has been
optimized for low reverse leakage at high temperature. The
proprietary barrier technology allows for reliable operation up
to 175 °C junction temperature. Typical applications are in
switching power supplies, converters, freewheeling diodes,
and reverse battery protection.
PRODUCT SUMMARY
IF(AV)
2 x 10 A
VR
35 to 45 V
MAJOR RATINGS AND CHARACTERISTICS
SYMBOL
CHARACTERISTICS
IF(AV)
Rectangular waveform
VRRM
Range
IFSM
VF
TJ
Range
VALUES
UNITS
20
A
35 to 45
V
tp = 5 µs sine
1060
A
10 Apk, TJ = 125 °C (per leg)
0.57
V
- 55 to 175
°C
VOLTAGE RATINGS
PARAMETER
SYMBOL
Maximum DC reverse voltage
Maximum working peak reverse voltage
VR
VRWM
20CTQ035
20CTQ040
20CTQ045
UNITS
35
40
45
V
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
TEST CONDITIONS
VALUES
UNITS
Maximum average forward current
See fig. 5
IF(AV)
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 = 2.0 A, L = 6.5 mH
13
mJ
IAR
Current decaying linearly to zero in 1 µs
Frequency limited by TJ maximum VA = 1.5 x VR typical
2.0
A
Repetitive avalanche current per leg
Document Number: 93275
Revision: 25-Jun-08
50 % duty cycle at TC = 145 °C, rectangular waveform
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
20
1060
A
265
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1
20CTQ... Series
Vishay High Power Products Schottky Rectifier, 2 x 10 A
ELECTRICAL SPECIFICATIONS
PARAMETER
SYMBOL
TEST CONDITIONS
10 A
Maximum forward voltage drop per leg
See fig. 1
VFM (1)
TJ = 25 °C
20 A
10 A
TJ = 125 °C
20 A
Maximum reverse leakage current per leg
See fig. 2
IRM (1)
TJ = 25 °C
VR = Rated VR
TJ = 125 °C
VALUES
UNITS
0.64
0.76
V
0.57
0.68
2
mA
15
Maximum junction capacitance per leg
CT
VR = 5 VDC (test signal range 100 kHz to 1 MHz) 25 °C
900
pF
Typical series inductance per leg
LS
Measured lead to lead 5 mm from package body
8.0
nH
10 000
V/µs
VALUES
UNITS
- 55 to 175
°C
Maximum voltage rate of change
Note
(1) Pulse width < 300 µs, duty cycle < 2 %
dV/dt
Rated VR
THERMAL - MECHANICAL SPECIFICATIONS
PARAMETER
SYMBOL
Maximum junction and storage
temperature range
TEST CONDITIONS
TJ, TStg
Maximum thermal resistance,
junction to case per leg
RthJC
Maximum thermal resistance,
junction to case per package
Typical thermal resistance,
case to heatsink
RthCS
DC operation
See fig. 4
3.25
DC operation
1.63
Mounting surface, smooth and greased
0.50
2
Approximate weight
Mounting torque
°C/W
g
0.07
oz.
minimum
6 (5)
kgf · cm
maximum
12 (10)
(lbf · in)
20CTQ035
Marking device
Case style TO-220AB
20CTQ040
20CTQ045
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For technical questions, contact: diodes-tech@vishay.com
Document Number: 93275
Revision: 25-Jun-08
20CTQ... Series
1000
1000
IR - Reverse Current (mA)
IF - Instantaneous Forward Current (A)
Schottky Rectifier, 2 x 10 A Vishay High Power Products
100
10
TJ = 175 °C
TJ = 125 °C
TJ = 25 °C
1
0.1
100
TJ = 175 °C
10
TJ = 150 °C
1
TJ = 125 °C
TJ = 100 °C
0.1
TJ = 75 °C
TJ = 50 °C
0.01
0.001
TJ = 25 °C
0.0001
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
1.8
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)
1000
TJ = 25 °C
100
10
0
20
30
40
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
0.001
0.00001
Single pulse
(thermal resistance)
0.0001
0.001
PDM
D = 0.50
D = 0.33
D = 0.25
D = 0.17
D = 0.08
0.01
t1
t2
Notes:
1. Duty factor D = t1/t2
2. Peak TJ = PDM x ZthJC + TC
0.1
1
10
100
t1 - Rectangular Pulse Duration (s)
Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics (Per Leg)
Document Number: 93275
Revision: 25-Jun-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
3
20CTQ... Series
Vishay High Power Products Schottky Rectifier, 2 x 10 A
9
20CTQ
RthJC (DC) = 3.25 °C/W
175
8
Average Power Loss (W)
Allowable Case Temperature (°C)
180
170
165
DC
160
155
150
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
7
6
5
RMS limit
4
3
DC
2
1
145
0
0
5
15
10
5
0
10
15
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)
1000
At any rated load condition
and with rated VRRM applied
following surge
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
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For technical questions, contact: diodes-tech@vishay.com
Document Number: 93275
Revision: 25-Jun-08
20CTQ... Series
Schottky Rectifier, 2 x 10 A Vishay High Power Products
ORDERING INFORMATION TABLE
Device code
20
C
T
Q
045
-
1
2
3
4
5
6
1
-
Current rating (20 = 20 A)
2
-
Circuit configuration:
C = Common cathode
3
-
Package:
4
-
Schottky “Q” series
5
-
Voltage ratings
6
-
T = TO-220
None = Standard production
035 = 35 V
040 = 40 V
045 = 45 V
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: 93275
Revision: 25-Jun-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
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