Bulletin PD-20056 rev. A 12/01
A
A
A
20CTQ...
20CTQ...S
20CTQ... -1
SCHOTTKY RECTIFIER
Major Ratings and Characteristics
Characteristics 20CTQ Units
I
Rectangular 20 A
F(AV)
waveform
V
range 35 to 45 V
RRM
I
@ tp = 5 µs sine 1060 A
FSM
VF@ 10 Apk, TJ = 125°C 0.57 V
(per leg)
TJrange - 55 to 175 °C
20CTQ... 20CTQ... S 20CTQ... -1
I
F(AV)
VR = 35 to 45V
Description/Features
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
Case Styles
20 Amp
= 20Amp
Base
Common
Cathode
2
2
1
Common
3
Cathode
node
Anode
TO-220 D2PAK
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node
1
Base
Common
Cathode
Common
Cathode
Base
Common
node
Cathode
2
2
1
Common
3
Cathode
Anode
2
2
3
Anode
TO-262
1
20CTQ... Series
Bulletin PD-20056 rev. A 12/01
Voltage Ratings
Part number 20CTQ035 20CTQ040 20CTQ045
VRMax. DC Reverse Voltage (V)
V
Max. Working Peak Reverse Voltage (V)
RWM
35 40 45
Absolute Maximum Ratings
Parameters 20CTQ Units Conditions
I
Max. Average Forward Current 20 A 50% duty cycle @ TC = 145°C, rectangular wave form
F(AV)
* See Fig. 5
I
Max. Peak One Cycle Non-Repetitive 1060 5µs Sine or 3µs Rect. pulse
FSM
A
Surge Current (Per Leg) * See Fig. 7 265 10ms Sine or 6ms Rect. pulse
EASNon-Repetitive Avalanche Energy 13 mJ T
(Per Leg)
= 25 °C, I
J
= 2.0 Amps, L = 6.5 mH
AS
IARRepetitive Avalanche Current 2.0 A Current decaying linearly to zero in 1 µsec
(Per Leg) Frequency limited by TJ max. VA = 1.5 x VR typical
Following any rated
load condition and with
rated V
RRM
applied
Electrical Specifications
Parameters 20CTQ Units Conditions
VFMMax. Forward Voltage Drop 0.64 V @ 10A
(Per Leg) * See Fig. 1 (1) 0.76 V @ 20A
0.57 V @ 10A
0.68 V @ 20A
IRMMax. Reverse Leakage Current 2 mA TJ = 25 °C
(Per Leg) * See Fig. 2 (1) 15 mA TJ = 125 °C
CTMax. Junction Capacitance (Per Leg) 900 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance (Per Leg) 8.0 nH Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change 10000 V/ µs
(Rated VR)
TJ = 25 °C
TJ = 125 °C
VR = rated V
(1) Pulse Width < 300µs, Duty Cycle <2%
R
Thermal-Mechanical Specifications
Parameters 20CTQ Units Conditions
TJMax. Junction Temperature Range -55 to 175 °C
T
Max. Storage Temperature Range -55 to 175 °C
stg
R
Max. Thermal Resistance Junction 3.25 °C/W DC operation * See Fig. 4
thJC
to Case (Per Leg)
R
Max. Thermal Resistance Junction 1.63 °C/W DC operation
thJC
to Case (Per Package)
R
Typical Thermal Resistance, Case 0.50 °C/W Mounting surface , smooth and greased
thCS
to Heatsink
wt Approximate Weight 2 (0.07) g (oz.)
T Mounting Torque Min. 6 (5)
Max. 12 (10)
Kg-cm
(Ibf-in)
2
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20CTQ... Series
5
8
Bulletin PD-20056 rev. A 12/01
1000
100
F
10
In stant aneous Forwar d Current - I (A)
1
T = 175°C
J
T = 125°C
J
T = 25°C
J
1000
100
T = 175°C
J
10
R
1
.1
.01
Rever se Current - I (mA)
.001
.0001
150°C
125°C
100°C
75°C
50°C
25°C
0 5 10 15 20 25 30 35 40 4
Reverse Voltage - V (V)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
1000
T
T = 25°C
J
Junct ion Capacit ance - C (pF)
R
.1
0.2.4.6.811.21.41.61.
Fig. 1 - Max. Forward Voltage Drop Characteristics
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100
0 1020304050
For ward Voltage Drop - V (V)
FM
Reverse Voltage - V (V)
Fig. 3 - Typical Junction Capacitance
(Per Leg)
10
D = 0.50
D = 0.33
1
thJC
Ther mal Impedance - Z (°C/W)
D = 0.25
D = 0.17
D = 0.08
.1
Not e s :
.01
Singl e Pulse
(Thermal Resist ance)
.001
.00001 .0001 . 001 . 01 .1 1 10 100
t , Rectangul ar Puls e Durat ion ( Seconds)
1
Fig. 4 - Max. Thermal Impedance Z
thJC
1. Duty factor D = t / t
2. Peak T = P x Z + T
Characteristics (Per Leg)
Vs. Reverse Voltage (Per Leg)
P
DM
t
1
t
2
JDMthJC
R
1
2
C
3
20CTQ... Series
5
5
Bulletin PD-20056 rev. A 12/01
180
175
170
165
160
155
150
Al l owab l e Cas e Te mperature - (°C)
145
05101
Average Forward Current - I (A)
20CTQ
R (DC) = 3.25°C/W
thJC
DC
F(AV)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
1000
FSM
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
9
D = 0 .0 8
8
D = 0 .1 7
D = 0 .2 5
7
D = 0 .3 3
D = 0 .5 0
6
5
4
RMS Li mit
3
2
Average Power Loss - (Watts)
1
0
05101
Average Forward Current - I (A)
DC
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
F(AV)
Non-Repetitive Surge Current - I (A)
100
10 100 1000 10000
Square Wave Pulse Duration - t (microsec)
p
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
HIGH-SPEED
SW ITCH
FREE-WHEEL
DIOD E
40HFL40S02
Vd = 25 Volt
+
CURRENT
MONITOR
DUT
IRFP460
Rg = 25 ohm
Fig. 8 - Unclamped Inductive Test Circuit
4
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Outline Table
A
A
20CTQ... Series
Bulletin PD-20056 rev. A 12/01
15.24 (0.60)
14.84 (0.58)
14.09 (0.55)
13.47 (0.53)
4.57 (0.18)
4.32 (0.17)
BASE
COMMON
CATHODE
2
1.40 (0.05)
1.15 (0.04)
15.49 (0.61)
14.73 (0.58)
3X
10.54 (0.41)
MAX.
3
1
2
3
1
2
93°
1.40 (0.055)
1.14 (0.045)
3.78 (0.15)
3.54 (0.14)
2.92 (0.11)
2.54 (0.10)
TERM 2
3.96 (0.16)
3.55 (0.14)
2.04 (0.080) MAX.
0.94 (0.04)
0.69 (0.03)
5.08 (0.20) REF.
10.16 (0.40)
REF.
8.89 (0.35)
REF.
2X
DIA.
0.61 (0.02) MAX.
6.47 (0.25)
6.18 (0.24)
2.61 (0.10)
2.32 (0.09)
0.93 (0.37)
0.69 (0.27)
1.32 (0.05)
1.22 (0.05)
6.48 (0.25)
6.23 (0.24)
2°
0.10 (0.004)
BASE
2.89 (0.11)
2.64 (0.10)
COMMON
CATHODE
123
NODE
COMMON
CATHODE
12
Conform to JEDEC outline TO-220AB
Dimensions in millimeters and (inches)
4.69 (0.18)
4.20 (0.16)
1.32 (0.05)
1.22 (0.05)
5.28 (0.21)
4.78 (0.19)
0.55 (0.02)
0.46 (0.02)
MINIMUM RECOMMENDED FOOTPRINT
11.43 (0.45)
2
ANODE
123
NODE
COMMON
ANODE
CATHODE
12
13
2
Conform to JEDEC outline D2Pak (SMD-220)
Dimensions in millimeters and (inches)
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4.57 (0.18)
4.32 (0.17)
0.61 (0.02) M AX.
5.08 (0.20) REF.
8.89 (0.35)
3.81 (0.15)
2.08 (0.08)
2X
17.78 (0.70)
2.54 (0.10)
2X
5
20CTQ... Series
A
Bulletin PD-20056 rev. A 12/01
Outline Table
Modified JEDEC outline TO-262
Dimensions in millimeters and (inches)
BASE
COMMON
CATHODE
2
Marking Information
EXAMPLE: THIS IS A 20CTQ045-1
LOT CODE 1789
ASSEMBLED ON WW 19, 1999
IN THE ASSEMBLY LINE "C"
6
INTERNATIONAL
RECTIFIER
LOGO
ASSEMBLY
LOT CODE
123
NODE
COMMON
ANODE
CATHODE
12
PART NUMBER
DATE CODE
YEAR 7 = 1999
WEEK 19
LINE C
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Tape & Reel Information
TRR
FEED DIRECTION
TRL
FEED DIRECTION
1.8 5 (0 .073)
1.6 5 (0 .065)
4.10 (0.161)
3.90 (0.153)
10 .90 ( 0.429 )
10 .70 ( 0.421 )
1.60 (0.063)
1.50 (0.059)
1.60 (0.063)
1.50 (0.059)
11.60 ( 0.457)
11.40 ( 0.449)
1.75 (0.069)
1.25 (0.049)
16 .10 ( 0.634 )
15 .90 ( 0.626 )
DIA.
DIA.
15.42 (0.609)
15.22 (0.601)
20CTQ... Series
Bulletin PD-20056 rev. A 12/01
0.368 (0.014 5)
0.342 (0.013 5)
24 .30 (0 .957 )
23 .90 (0 .941 )
4.72 (0.18 6)
4.52 (0.17 8)
360 (14.173)
DIA. MAX.
13.50 (0.5 32)
12.80 (0.5 04)
DIA.
Ordering Information Table
Device Code
1 - Essential Part Number
2 - Common Cathode
3 - T = TO-220
4 - Q = Schottky Q Series
5 - Voltage Rating
6 -S=D2Pak
6 - -1 = TO-262
26.40 (1.0 39)
24.40 (0.9 61)
60 (2.36 2)
DIA. MIN.
Dimensions in millimeters and (inches)
20 C T Q 045 -1
1
3
524
SMD-220 Tape & Reel
When ordering, indi cate the part
number, part orientation, and t he
quantity. Quantities are in multiples
of 8 00 p iece s pe r reel for b oth
TRL and TRR.
6
035 = 35V
040 = 40V
045 = 45V
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7
20CTQ... Series
Bulletin PD-20056 rev. A 12/01
This product has been designed and qualified for Industrial Level.
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
8
Data and specifications subject to change without notice.
Qualification Standards can be found on IR's Web site.
TAC Fax: (310) 252-7309
Visit us at www.irf.com for sales contact information. 12/01
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