Bulletin PD-20794 rev. A 11/06
40L40CWPbF
40L45CWPbF
SCHOTTKY RECTIFIER
2 x 20 Amps
I
F(AV)
= 40Amp
V
R
= 40-45V
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, Typical)
Description/ Features
Units
A
The 40L..CWPbF 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 applica-
tions are in switching power supplies.
150° C T
J
operation
Center tap TO-247 package
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Lead-Free ("PbF" suffix)
40L..CW
40
40 - 45
1240
0.42
V
A
V
- 55 to 150
°C
Case Styles
Base
Common
Cathode
2
1
3
2
Anode
1
Anode
2
Common
Cathode
TO-247AC
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40L45CWPbF revA.pmd
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21-Nov-06, 11:05
40L40CWPbF, 40L45CWPbF
Bulletin PD-20794 rev. A 11/06
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
40L40CWPbF
40
40L45CWPbF
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)
40L..CW
Units
20
40
1240
350
20
3
A
mJ
A
A
Conditions
50% duty cycle @ T
C
= 122 °C, rectangular wave form
5μs Sine or 3μs Rect. pulse
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg) * See Fig. 7
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
(Per Leg)
T
J
= 25 °C, I
AS
= 3 Amps, L = 4.4 mH
Current decaying linearly to zero in 1
μsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Electrical Specifications
Parameters
V
FM
Forward Voltage Drop
(Per Leg) * See Fig. 1
40L..CW
Units
Typ.
0.48
0.61
0.42
0.60
-
(1)
20
Max.
0.53
0.69
0.49
0.70
1.5
80
0.27
8.72
-
7.5
1500
-
V
V
V
V
mA
mA
V
mΩ
pF
nH
@ 20A
@ 40A
@ 20A
@ 40A
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
(1)
I
RM
Reverse Leakage Current
(Per Leg) * See Fig. 2
T
J
= 25 °C
T
J
= 100 °C
T
J
=
T
J
max.
V
F(TO)
Threshold Voltage
r
t
C
T
L
S
Forward Slope Resistance
Max. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
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
10000
V/
μs
(Rated V
R
)
(1) Pulse Width < 300μs, Duty Cycle <2%
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
40L..CW
Units
-55 to 150
-55 to 150
1.6
0.8
0.24
6 (0.21)
Min.
Max.
6 (5)
12 (10)
°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
Case Style
Marking Device
°C/W DC operation
°C/W DC operation
* See Fig. 4
°C/W Mounting surface , smooth and greased
g (oz.)
Kg-cm Non-lubricated threads
(Ibf-in)
TO-247AC(TO-3P) JEDEC
40L40CW
40L45CW
2
40L45CWPbF revA.pmd
2
21-Nov-06, 11:05
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40L40CWPbF, 40L45CWPbF
Bulletin PD-20794 rev. A 11/06
1000
1000
100
Reverse Current - I
R
(mA)
10
1
0.1
25°C
0.01
0.001
T
J
= 150°C
T
J
= 125°C
T
J
= 25°C
T
J
= 150°C
125°C
100°C
75°C
50°C
Ins
tantaneous Forward Current - I
F
(A)
100
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
Junction Capacitance - C
T
(pF)
10
T = 25°C
J
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)
Revers Voltage - V
R
(V)
e
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
10
T
hermal 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
S
ingle Pulse
(T
hermal Resistanc e)
Notes:
t1
t2
1. Duty factor D = t 1 / t 2
2. Peak T
J
= P x Z
thJC
+ T
DM
C
0.1
1
10
100
0.01
0.00001
0.0001
0.001
0.01
t , Rec ta ngular Pulse Duration (S onds)
ec
1
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
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40L45CWPbF revA.pmd
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40L40CWPbF, 40L45CWPbF
Bulletin PD-20794 rev. A 11/06
150
Allowable Cas T
e emperature - (°C)
Average Power Loss - (Watts)
18
16
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
RMSLimit
DC
140
DC
130
S
quare wave (D = 0.50)
80% R
ated V
R
applied
14
12
10
8
6
4
2
120
110
see note (2)
100
0
0
5
10
15
20
25
30
0
5
10
15
20
25
30
(A)
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Non-Repetitive S
urge Current - I
FSM
(A)
10000
At Any Rated 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
FP460
R = 25 ohm
g
Vd = 25 Volt
CURR
ENT
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
= 80% rated V
R
4
40L45CWPbF revA.pmd
4
21-Nov-06, 11:05
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40L40CWPbF, 40L45CWPbF
Bulletin PD-20794 rev. A 11/06
Outline Table
Conform to JEDEC outline TO-247AC (TO-3P)
Dimensions in millimeters and (inches)
Marking Information
EXAMPLE: THIS IS A 40L45CW
WITH ASSEMBLY
LOT CODE 5657
ASSEMBLED ON WW 35, 2000
IN ASSEMBLY LINE "H"
INTERNATIONAL
RECTIFIER
LOGO
ASSEMBLY
LOT CODE
PART NUMBER
40L45CW
P035H
56
57
DATE CODE
P = LEAD-FREE
YEAR 0 = 2000
WEEK 35
LINE H
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40L45CWPbF revA.pmd
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21-Nov-06, 11:05
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