Characteristics
40L..CW
Units
Major Ratings and Characteristics
Description/ Features
The 40L..CW 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 applications 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
I
F(AV)
Rectangular
40
A
waveform
V
RRM
40 - 45
V
I
FSM
@ tp = 5 s sine
1240
A
V
F
@
20 Apk, T
J
=125C
0.42
V
(per leg, Typical)
T
J
- 55 to 150
C
SCHOTTKY RECTIFIER
40L40CW
40L45CW
Bulletin PD-20566 rev. B 07/02
2 x 20 Amps
1
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Case Styles
TO-247AC
40L..CW
Base
Common
Cathode
Anode
Anode
Common
Cathode
1
3
2
1
2
2
40L40CW, 40L45CW
Bulletin PD-20566 rev. B 07/02
2
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I
F(AV)
Max. Average Forward
(Per Leg)
20
A
50% duty cycle @ T
C
= 122 C, rectangular wave form
Current * See Fig. 5
(Per Device)
40
I
FSM
Max. Peak One Cycle Non-Repetitive
1240
5s Sine or 3s Rect. pulse
Surge Current (Per Leg) * See Fig. 7
350
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
20
mJ
T
J
= 25 C, I
AS
= 3 Amps, L = 4.4 mH
(Per Leg)
I
AR
Repetitive Avalanche Current
3
A
Current decaying linearly to zero in 1 sec
(Per Leg)
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Part number
40L40CW
40L45CW
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
40
45
T
J
Max. Junction Temperature Range
-55 to 150
C
T
stg
Max. Storage Temperature Range
-55 to 150
C
R
thJC
Max. Thermal Resistance Junction
1.6
C/W DC operation
* See Fig. 4
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
0.8
C/W DC operation
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
0.24
C/W Mounting surface , smooth and greased
to Heatsink
wt
Approximate Weight
6 (0.21)
g (oz.)
T
Mounting Torque
Min.
6 (5)
Non-lubricated threads
Max.
12 (10)
Case Style
TO-247AC(TO-3P) JEDEC
Thermal-Mechanical Specifications
Kg-cm
(Ibf-in)
Parameters
40L..CW
Units
Conditions
Absolute Maximum Ratings
Following any rated
load condition and with
rated V
RRM
applied
Parameters
40L..CW
Units
Conditions
A
Typ. Max.
V
FM
Forward Voltage Drop
0.48 0.53
V
@ 20A
(Per Leg) * See Fig. 1
(1)
0.61 0.69
V
@ 40A
0.42 0.49
V
@ 20A
0.60 0.70
V
@ 40A
I
RM
Reverse Leakage Current
-
1.5
mA
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
20
80
mA
T
J
= 100 C
V
F(TO)
Threshold Voltage
0.27
V
T
J
=
T
J
max.
r
t
Forward Slope Resistance
8.72
m
C
T
Max. Junction Capacitance (Per Leg)
-
1500
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25C
L
S
Typical Series Inductance (Per Leg)
7.5
-
nH
Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change
10000
V/ s (Rated V
R
)
T
J
= 25 C
T
J
= 125 C
V
R
= rated V
R
Parameters
40L..CW
Units
Conditions
(1) Pulse Width < 300s, Duty Cycle <2%
Voltage Ratings
Electrical Specifications
40L40CW, 40L45CW
Bulletin PD-20566 rev. B 07/02
3
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Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
1 00
10 0 0
1 00 0 0
0
10
20
30
40
5 0
R
T
J
u
nc
t
i
on
C
a
p
a
c
i
t
a
nc
e -
C
(
p
F
)
Reverse V oltag e - V (V )
T = 25 C
J
1
1 0
10 0
10 0 0
0
0 .2
0 .4
0 .6
0.8
1
1 .2
1 .4
1 .6
1.8
I
n
st
a
n
t
a
n
e
o
u
s
F
o
r
w
a
r
d
C
u
rr
e
n
t
-
I
(
A
)
F
FM
T = 150 C
T = 125 C
T = 25 C
J
J
J
Forw a rd V oltag e D rop - V (V )
0 .0 0 1
0 .0 1
0 .1
1
10
1 0 0
1 0 0 0
0
5
10
1 5
2 0
25
3 0
3 5
40
4 5
R
R
125 C
100 C
75 C
50 C
25 C
R
e
v
e
r
s
e
C
u
rre
n
t
-
I
(
m
A
)
Re verse V olta g e - V (V )
T = 150 C
J
0 .01
0 .1
1
1 0
0 .00 00 1
0 .0 00 1
0 .0 0 1
0.0 1
0 .1
1
10
1 00
th
J
C
Single Pulse
(Therm a l Resistance)
1
T
h
e
r
m
a
l
I
m
p
e
d
a
n
c
e
Z
(
C
/
W
)
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
t , Recta ng ular Pulse D ura tio n (Seco nds)
1
2
C
thJ C
D M
J
2
t
1
t
P
D M
N otes:
1. D uty fac to r D = t / t
2. P eak T = P x Z + T
40L40CW, 40L45CW
Bulletin PD-20566 rev. B 07/02
4
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Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
FR EE-W HE EL
D IO D E
40H FL40S02
C UR RE N T
M O N ITO R
H IG H -SPE ED
SW ITC H
IRFP460
L
D UT
Rg = 25 ohm
V d = 25 V olt
+
(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
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
0
5
1 0
15
20
2 5
3 0
D C
A
v
e
r
ag
e
P
o
w
e
r
L
o
s
s
-
(
W
at
t
s
)
F(A V)
RM S Lim it
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
A ve ra g e Forw a rd C urre n t - I (A )
1 0 0
1 1 0
1 2 0
1 3 0
1 4 0
1 5 0
0
5
1 0
1 5
2 0
2 5
3 0
D C
A
l
l
o
w
a
b
l
e C
a
s
e
T
e
m
p
e
r
a
t
ur
e -
(
C
)
F(A V )
se e n o te (2)
A vera g e F orw a rd C u rren t - I (A )
Sq ua re w a ve (D = 0.50)
80% Rate d V a p p lie d
R
100
1000
10000
10
100
1000
10000
FS
M
N
o
n
-
R
e
p
e
t
i
t
i
v
e
S
u
r
g
e
C
u
rr
e
n
t
-
I
(
A
)
p
A t A n y Rate d Load C on dition
A n d W ith Ra te d V Ap plie d
Follow in g Surg e
RRM
Sq uare W a ve Pulse D uration - t (m ic rosec )
40L40CW, 40L45CW
Bulletin PD-20566 rev. B 07/02
5
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IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7309
Visit us at www.irf.com for sales contact information. 07/02
Data and specifications subject to change without notice.
This product has been designed and qualified for Industrial Level.
Qualification Standards can be found on IR's Web site.
Conform to JEDEC outline TO-247AC (TO-3P)
Dimensions in millimeters and (inches)
15.90 (0.626)
15.30 (0.602)
14 .20 (0 .559 )
14. 80 ( 0.583)
3. 70 (0.145)
4. 30 (0.170)
5.30 ( 0.208)
5. 70 (0.225)
5.50 ( 0.217)
4. 50 (0.177)
(2 PLCS.)
3. 55 (0.139)
3. 65 (0.144)
2. 20 (0.087)
MAX.
1. 00 (0.039)
1. 40 (0 .05 6)
0. 40 (0.213)
0.80 ( 0.032)
4.70 ( 0.185)
5. 30 (0.209)
1.5 ( 0.059)
2.5 ( 0.098)
2. 40 (0.095)
MAX.
10.86 (0.427)
10. 94 ( 0.430)
20.30 (0.800)
19.70 (0.775)
DIA.
1
2
3
Outline Table
Base
Common
Cathode
Anode
Anode
Common
Cathode
1
3
2
1
2
2
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