I
F(AV)
Rectangular
40
A
waveform
V
RRM
15
V
I
FSM
@ tp = 5 s sine
700
A
V
F
@
19 Apk, T
J
=125C
0.25
V
(per leg, Typical)
T
J
- 55 to 125
C
Characteristics
40L15CW Units
Major Ratings and Characteristics
SCHOTTKY RECTIFIER
2 x 20 Amps
40L15CW
Bulletin PD-20567 rev. D 08/03
1
www.irf.com
The 40L15CW center tap Schottky rectifier module has been
optimized for ultra low forward voltage drop specifically for
the OR-ing of parallel power supplies. The proprietary barrier
technology allows for reliable operation up to 125 C junction
temperature. Typical applications are in parallel switching
power supplies, converters, reverse battery protection, and
redundant power subsystems.
125C T
J
operation (V
R
< 5V)
Center tap module
Optimized for OR-ing applications
Ultra low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Description/ Features
Case Styles
TO-247AC
40L15CW
40L15CW
Bulletin PD-20567 rev. D 08/03
2
www.irf.com
I
F(AV)
Max. Average Forward (Per Leg)
20
A
50% duty cycle @ T
C
= 86C, rectangular wave form
Current * See Fig. 5 (Per Device)
40
I
FSM
Max. Peak One Cycle Non-Repetitive
700
5s Sine or 3s Rect. pulse
Surge Current (Per Leg) * See Fig. 7
330
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
10
mJ
T
J
= 25 C, I
AS
= 2 Amps, L = 5 mH
(Per Leg)
I
AR
Repetitive Avalanche Current
2
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
40L15CW
V
R
Max. DC Reverse Voltage (V)
@ T
J
= 100 C
V
RWM
Max. Working Peak Reverse Voltage (V) @ T
J
= 100 C
15
T
J
Max. Junction Temperature Range
-55 to 125
C
T
stg
Max. Storage Temperature Range
-55 to 150
C
R
thJC
Max. Thermal Resistance Junction
1.4
C/W DC operation
* See Fig. 4
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
0.7
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
40L15CW
Units
Conditions
Absolute Maximum Ratings
Following any rated
load condition and with
rated V
RRM
applied
Parameters
40L15CW
Units
Conditions
A
Typ. Max.
V
FM
Forward Voltage Drop
-
0.41
V
@ 19A
(Per Leg) * See Fig. 1
(1)
-
0.52
V
@ 40A
0.25 0.33
V
@ 19A
0.37 0.50
V
@ 40A
I
RM
Reverse Leakage Current
-
10
mA
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
-
600
mA
T
J
= 100 C
V
F(TO)
Threshold Voltage
0.182
V
T
J
=
T
J
max.
r
t
Forward Slope Resistance
7.6
m
C
T
Max. Junction Capacitance (Per Leg)
-
2000
pF
V
R
= 5V
DC
(test signal range 100Khz to 1Mhz) 25C
L
S
Typical Series Inductance (Per Leg)
8
-
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
40L15CW
Units
Conditions
(1) Pulse Width < 300s, Duty Cycle <2%
Voltage Ratings
Electrical Specifications
40L15CW
Bulletin PD-20567 rev. D 08/03
3
www.irf.com
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
Fig. 1 - Maximum Forward Voltage Drop Characteristics
1
10
100
1000
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
F
FM
Forward Voltage Drop - V (V)
I
n
s
t
a
n
t
a
ne
ou
s
F
o
r
w
a
r
d
C
u
r
r
e
n
t
-
I
(
A
)
T = 125C
T = 75C
T = 25C
J
J
J
0.1
1
10
100
1000
0
3
6
9
12
15
R
R
75C
50C
25C
R
e
v
e
r
s
e
C
u
rr
e
n
t
- I
(
m
A
)
Reverse Voltage - V (V)
T = 100C
J
100
1000
10000
0
5
10
15
20
R
T
J
u
nc
t
i
on C
a
p
a
c
i
t
a
nc
e
-
C (
p
F
)
Reverse Voltage - V (V)
T = 25C
J
0.01
0.1
1
10
0.00001
0.0001
0.001
0.01
0.1
1
10
100
th
J
C
t , Rectangular Pulse Duration (Seconds)
Single Pulse
(Thermal Resistance)
1
T
h
e
r
m
a
l
I
m
peda
n
c
e
Z
(
C
/
W
)
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
2
J
thJC
C
DM
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
2
t
1
t
P
DM
40L15CW
Bulletin PD-20567 rev. D 08/03
4
www.irf.com
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
70
75
80
85
90
95
100
0
5
10
15
20
25
A
l
l
o
wa
b
l
e C
a
s
e
T
e
mp
er
a
t
u
r
e -
(
C
)
F(AV)
Average Forward Current - I (A)
Square wave (D = 0.50)
0
2
4
6
8
10
12
14
0
5
10
15
20
25
30
DC
A
v
er
a
g
e P
o
w
e
r
L
o
s
s
-
(
W
a
t
t
s
)
F(AV)
RMS Limit
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Average Forward Current - I (A)
100
1000
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
r
r
e
n
t
-
I
(
A
)
p
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
40L15CW
Bulletin PD-20567 rev. D 08/03
5
www.irf.com
Dimensions in millimeters and (inches)
Conform to JEDEC outline TO-247AC (TO-3P)
2
BASE
COMMON
CATHODE
1
2
3
ANODE
COMMON
CATHODE
ANODE
1
2
15 .90 (0 .626 )
15 .30 (0 .602 )
14 .20 (0 .559 )
14. 80 ( 0.583)
3. 70 (0 .14 5)
4. 30 (0 .17 0)
5.30 ( 0.208)
5. 70 (0 .22 5)
5.50 ( 0.217)
4. 50 (0 .17 7)
(2 PLCS.)
3. 55 (0 .13 9)
3. 65 (0 .14 4)
2. 20 (0 .08 7)
MAX .
1. 00 (0 .03 9)
1. 40 (0 .05 6)
0. 40 (0 .21 3)
0.80 ( 0.032)
4.70 ( 0.185)
5. 30 (0 .20 9)
1.5 ( 0.059)
2.5 ( 0.098)
2. 40 (0 .09 5)
MAX .
10 .86 (0 .427 )
10. 94 ( 0.430)
20 .30 (0 .800 )
19 .70 (0 .775 )
DIA.
1
2
3
Outline Table
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. 08/03
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.
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