Bulletin PD-20849 rev. A 05/06
40CTQ045PbF
SCHOTTKY RECTIFIER
40 Amp
I
F(AV)
= 40Amp
V
R
= 45V
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
I
FSM
@ tp = 5
μs
sine
V
F
T
J
@ 20 Apk, T
J
= 125°C
(per leg)
range
Description/ Features
Units
A
V
A
V
This center tap Schottky rectifier has been optimized for very
low forward voltage drop, with moderate leakage. The propri-
etary barrier technology allows for reliable operation up to
150° C junction temperature. Typical applications are in
switching power supplies, converters, free-wheeling diodes,
and reverse battery protection.
150° C T
J
operation
Center tap configuration
Very 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)
Values
40
45
1240
0.48
- 55 to 150
°C
Case Styles
40CTQ045PbF
Base
Common
Cathode
2
1
Anode
2
Common
Cathode
3
Anode
TO-220
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40CTQ045PbF
Bulletin PD-20849 rev. A 05/06
Voltage Ratings
Parameters
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
40CTQ045PbF
45
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward
Current
I
FSM
E
AS
I
AR
* See Fig. 5
(Per Leg)
(Per Device)
* See Fig. 7
Values
20
40
1240
350
20
3
Units
A
Conditions
50% duty cycle @ T
C
= 116°C, rectangular wave form
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
T
J
= 25 °C, I
AS
= 3 Amps, L = 4.40 mH
5μs Sine or 3μs Rect. pulse
Current decaying linearly to zero in 1
μsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg)
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
(Per Leg)
A
mJ
A
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
Values
0.53
0.68
0.48
0.67
3
115
0.27
8.72
2800
8.0
10000
Units
V
V
V
V
mA
mA
V
mΩ
Conditions
@ 20A
@ 40A
@ 20A
@ 40A
T
J
= 25 °C
T
J
= 125 °C
T
J
= T
J
max.
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
Max. Reverse Leakage Current
(Per Leg) * See Fig. 2
(1)
V
F(TO)
Threshold Voltage
r
t
C
T
L
S
Forward Slope Resistance
Max. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
pF
nH
V/
μs
V
R
= 5V
DC
(test signal range 100Khz to 1Mhz) 25°C
Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change
(Rated V
R
)
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
(1) Pulse Width < 300μs, Duty Cycle <2%
Values
-55 to 150
-55 to 150
2.0
1.0
0.50
2 (0.07)
Min.
Max.
6 (5)
12 (10)
Units
°C
°C
Conditions
R
thJC
Max. Thermal Resistance Junction
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
to Heatsink
wt
T
Approximate Weight
Mounting Torque
Marking Device
°C/W DC operation
°C/W DC operation
°C/W Mounting surface , smooth and greased
g (oz.)
Kg-cm
(Ibf-in)
40CTQ045
2
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40CTQ045PbF
Bulletin PD-20849 rev. A 05/06
1000
1000
100
10
1
0.1
25°C
0.01
0.001
T
J
= 150°C
125°C
100°C
75°C
50°C
Instantaneous F
orward Current - I
F
(A)
100
R
everse Current - I
R
(mA)
0
5
10 15 20
25 30
35 40 45
R
evers Voltage - V
R
(V)
e
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
10000
Junc tion Capacitance - C
T
(pF)
10
T
J
= 150°C
T
J
= 125°C
T
J
= 25°C
T
J
= 25°C
1000
1
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
100
0
10
20
30
40
50
Forward Voltage Drop - V
FM
(V)
R
everse Voltage - V
R
(V)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
10
Thermal Impedance Z
thJC
(°C/ W)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
1
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
P
DM
0.1
Notes:
S
ingle Pulse
(T
hermal Resistanc e)
0.01
0.00001
0.0001
0.001
0.01
0.1
t1
t2
1. Duty fac tor D = t 1/ t 2
2. Peak T = P x Z
thJC
+ T
C
J
DM
1
10
100
t 1 , Rectangular Pulse Duration (S onds)
ec
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
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40CTQ045PbF
Bulletin PD-20849 rev. A 05/06
150
Allowable Case T
emperature - (°C)
145
140
135
130
125
120
115
110
105
100
0
S
quare wave (D = 0.50)
80% R
ated V
R
applied
DC
18
16
Average Power Loss - (Watts)
14
12
10
8
6
4
2
10
15
20
25
30
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
R Limit
MS
DC
see note (2)
5
0
0
5
10
15
20
25
30
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Non-Repetitive S
urge Current - I
FS
(A)
M
10000
At Any R
ated Load Condition
And With Rated V
RRM
Applied
Following S
urge
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
1000
100
10
100
1000
10000
S
quare Wave Pulse Duration - t p (microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
HIGH-S
PEED
S CH
WIT
FREE-WHEEL
DIODE
40HF
L40S
02
+
DUT
IR P460
F
R = 25 ohm
g
Vd = 25 Volt
CURRENT
MONIT
OR
Fig. 8 - Unclamped Inductive Test Circuit
(2)
Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/
D) (see Fig. 6);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= 10 V
4
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40CTQ045PbF
Bulletin PD-20849 rev. A 05/06
Outline Table
Conform to JEDEC outline TO-220AB
Part Marking Information
IRXC Assembly Line - SubCon Assembly Line
EXAMPLE: THIS IS A 40CTQ045
LOT CODE 1789
ASSEMBLED ON WW 19, 2001
IN THE ASSEMBLY LINE "C"
PART NUMBER
INTERNATIONAL
RECTIFIER
LOGO
ASSEMBLY
LOT CODE
DATE CODE
P = LEAD-FREE
YEAR 1 = 2001
WEEK 19
LINE C
IRMX Assembly Line
EXAMPLE: THIS IS A 40CTQ045
LOT CODE 1789
ASSEMBLED ON WW 19, 2001
INTERNATIONAL
RECTIFIER
LOGO
ASSEMBLY
LOT CODE
PART NUMBER
DATE CODE
YEAR 1 = 2001
WEEK 19
P = LEAD-FREE
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5
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