Bulletin PD-21029 rev. A 06/06
20CTQ...SPbF
20CTQ... -1PbF
SCHOTTKY RECTIFIER
20 Amp
IF(AV) = 20Amp
VR = 35/ 45V
Description/ Features
Major Ratings and Characteristics
Characteristics
Values
Units
IF(AV) Rectangular
20
A
35 / 45
V
IFSM @ tp = 5 μs sine
1060
A
VF
@ 10 Apk, TJ = 125°C
0.57
V
TJ
range
- 55 to 175
°C
waveform
VRRM range
(per leg)
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, free-wheeling diodes,
and reverse battery protection.
175° C TJ operation
Center tap TO-220 package
Low forward voltage drop
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Lead-Free ("PbF" suffix)
Case Styles
20CTQ...SPbF
20CTQ...-1PbF
Base
Common
Cathode
Base
Common
Cathode
2
1
Anode
2
Common
Cathode
D2PAK
Document Number: 94163
2
3
Anode
1
Anode
2
Common
Cathode
3
Anode
TO-262
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20CTQ...SPbF, 20CTQ...-1PbF Series
Bulletin PD-21029 rev. A 06/06
Voltage Ratings
Part number
VR
20CTQ035SPbF
20CTQ035-1PbF
20CTQ040SPbF
20CTQ040-1PbF
20CTQ045SPbF
20CTQ045-1PbF
35
40
45
Max. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V)
Absolute Maximum Ratings
Parameters
20CTQ Units
IF(AV) Max. Average Forward Current
20
A
Conditions
50% duty cycle @ TC = 145°C, rectangular wave form
* See Fig. 5
IFSM
Max. Peak One Cycle Non-Repetitive
1060
Surge Current (Per Leg) * See Fig. 7
265
EAS
Non-Repetitive Avalanche Energy
(Per Leg)
13
mJ
IAR
Repetitive Avalanche Current
(Per Leg)
2.0
A
A
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated VRRM applied
5μs Sine or 3μs Rect. pulse
TJ = 25 °C, IAS = 2.0 Amps, L = 6.5 mH
Current decaying linearly to zero in 1 μsec
Frequency limited by TJ max. VA = 1.5 x VR typical
Electrical Specifications
Parameters
VFM
Max. Forward Voltage Drop
Conditions
0.64
V
@ 10A
0.76
0.57
V
V
@ 20A
@ 10A
0.68
V
@ 20A
Max. Reverse Leakage Current
2
mA
TJ = 25 °C
(Per Leg) * See Fig. 2
15
mA
TJ = 125 °C
(Per Leg) * See Fig. 1
IRM
20CTQ Units
(1)
(1)
TJ = 25 °C
TJ = 125 °C
VR = rated VR
CT
Max. Junction Capacitance (Per Leg)
900
pF
VR = 5VDC (test signal range 100Khz to 1Mhz) 25°C
LS
Typical Series Inductance (Per Leg)
8.0
nH
Measured lead to lead 5mm from package body
10000
V/ μs
dv/dt Max. Voltage Rate of Change
(Rated V R)
(1) Pulse Width < 300μs, Duty Cycle <2%
Thermal-Mechanical Specifications
Parameters
20CTQ Units
TJ
Max. Junction Temperature Range
-55 to 175
Tstg
Max. Storage Temperature Range
-55 to 175
Conditions
°C
°C
RthJC Max. Thermal Resistance Junction
to Case (Per Leg)
3.25
°C/W DC operation
RthJC Max. Thermal Resistance Junction
to Case (Per Package)
1.63
°C/W DC operation
RthCS Typical Thermal Resistance, Case
to Heatsink
0.50
°C/W Mounting surface , smooth and greased
wt
Approximate Weight
T
Mounting Torque
Marking Device
Document Number: 94163
2 (0.07)
g (oz.)
Min.
6 (5)
Max.
12 (10)
Kg-cm
(Ibf-in)
20CTQ...S
Case style D2Pak
20CTQ...-1
Case style TO-262
* See Fig. 4
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20CTQ...SPbF, 20CTQ...-1PbF Series
Bulletin PD-21029 rev. A 06/06
1000
ReverseCurrent - I (mA)
R
1000
T =175°C
J
10
150°C
125°C
1
100°C
.1
75°C
50°C
.01
25°C
.001
.0001
0
5
10 15 20 25 30 35 40 45
ReverseVoltage- VR (V)
10
T =175°C
J
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
T =125°C
J
1000
T = 25°C
J
JunctionCapacitance- C (pF)
T
InstantaneousForwardCurrent - I (A)
F
100
100
1
.1
0
.2
.4
.6
.8
1
1.2
1.4
T =25°C
J
100
0
1.6 1.8
10
20
30
40
50
ReverseVoltage- V (V)
R
ForwardVoltageDrop- V (V)
FM
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
Thermal Impedance-ZthJC(°C/W
)
10
1
D=0.50
D=0.33
D=0.25
D=0.17
D=0.08
P
DM
t
1
t
2
.1
Notes:
1. Dutyfactor D= t / t
1 2
.01
SinglePulse
(Thermal Resistance)
.001
.00001
.0001
.001
2. PeakT =P xZ
+T
J DM thJC C
.01
.1
1
10
100
t , Rectangular PulseDuration(Seconds)
1
Fig. 4 - Max. Thermal Impedance ZthJC Characteristics (Per Leg)
Document Number: 94163
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3
20CTQ...SPbF, 20CTQ...-1PbF Series
Bulletin PD-21029 rev. A 06/06
9
20CTQ
RthJC (DC) =3.25°C/W
175
AveragePower Loss- (W
atts)
AllowableCaseTemperature- (°C)
180
170
165
160
DC
155
150
D=0.08
8 D=0.17
D=0.25
7
D=0.33
6 D=0.50
5
DC
4 RMSLimit
3
2
1
145
0
5
10
0
0
15
5
10
15
AverageForwardCurrent - I
(A)
F(AV)
AverageForwardCurrent - IF(AV) (A)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
Non-Repetitive Surge Current - I
FSM
(A)
1000
At Any Rated Load Condition
And With Rated VRRM Applied
Following Surge
100
10
100
1000
10000
Square Wave Pulse Duration - t p (microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
DUT
IRFP460
Rg = 25 ohm
CURRENT
MONITOR
HIGH-SPEED
SWITCH
FREE-WHEEL
DIODE
+
Vd = 25 Volt
40HFL40S02
Fig. 8 - Unclamped Inductive Test Circuit
Document Number: 94163
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20CTQ...SPbF, 20CTQ...-1PbF Series
Bulletin PD-21029 rev. A 06/06
Outlines Table
Conform to JEDEC outline D2Pak (SMD-220)
Dimensions in millimeters and (inches)
Modified JEDEC outline TO-262
Dimensions in millimeters and (inches)
Document Number: 94163
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20CTQ...SPbF, 20CTQ...-1PbF Series
Bulletin PD-21029 rev. A 06/06
Part Marking Information
D2PAK
THIS IS A 20CTQ045S
LOT CODE 8024
ASSEMBLED ON WW 02, 2000
INTERNATIONAL
RECTIFIER
LOGO
PART NUMBER
20CTQ045S
DATE CODE
ASSEMBLY
LOT CODE
YEAR 0 = 2000
WEEK 02
P = LEAD-FREE
TO-262
EXAMPLE: THIS IS A 20CTQ045-1
LOT CODE 1789
ASSEMBLED ON WW 19, 2002
INTERNATIONAL
RECTIFIER
LOGO
ASSEMBLY
LOT CODE
PART NUMBER
DATE CODE
YEAR 2 = 2002
WEEK 19
P = LEAD-FREE
Tape & Reel Information
Dimensions in millimeters and (inches)
Document Number: 94163
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20CTQ...SPbF, 20CTQ...-1PbF Series
Bulletin PD-21029 rev. A 06/06
Ordering Information Table
Device Code
20
C
T
Q
045
1
2
3
4
5
S TRL PbF
6
7
8
1
-
Current Rating (20A)
2
-
Circuit Configuration
3
-
T = TO-220
4
-
Schottky "Q" Series
035 = 35V
5
-
Voltage Ratings
040 = 40V
-
2
045 = 45V
C = Common Cathode
6
y S = D Pak
y -1= TO-262
7
-
y none = Tube (50 pieces)
y TRL = Tape & Reel (Left Oriented - for D2Pak only)
y TRR = Tape & Reel (Right Oriented - for D 2Pak only)
8
-
y none = Standard Production
y PbF = Lead-Free
Data and specifications subject to change without notice.
This product has been designed and qualified for Industrial Level and Lead-Free.
Qualification Standards can be found on IR's Web site.
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7309
06/06
Document Number: 94163
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Legal Disclaimer Notice
Vishay
Notice
The products described herein were acquired by Vishay Intertechnology, Inc., as part of its acquisition of
International Rectifier’s Power Control Systems (PCS) business, which closed in April 2007. Specifications of the
products displayed herein are pending review by Vishay and are subject to the terms and conditions shown below.
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc., or
anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
International Rectifier®, IR®, the IR logo, HEXFET®, HEXSense®, HEXDIP®, DOL®, INTERO®, and POWIRTRAIN®
are registered trademarks of International Rectifier Corporation in the U.S. and other countries. All other product
names noted herein may be trademarks of their respective owners.
Document Number: 99901
Revision: 12-Mar-07
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