I
F(AV)
Rectangular
40
A
waveform
V
RRM
35/40/45
V
I
FSM
@ tp = 5 s sine
3500
A
V
F
@
20 Apk, T
J
=125C
0.43
V
(per leg)
T
J
- 55 to 150
C
Characteristics
40CPQ... Units
Major Ratings and Characteristics
Description/Features
The 40CPQ... 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, converters, free-wheeling diodes,
and reverse battery protection.
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
SCHOTTKY RECTIFIER
40 Amp
40CPQ035
40CPQ040
40CPQ045
Bulletin PD-2.307 rev. B 12/01
1
www.irf.com
Case Styles
TO-247AC
40CPQ045
Base
Common
Cathode
Anode
Anode
Common
Cathode
1
3
2
1
2
2
40CPQ035, 40CPQ040, 40CPQ045
Bulletin PD-2.307 rev. B 12/01
2
www.irf.com
Part number
40CPQ035
40CPQ040
40CPQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
35
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
1.25
C/W DC operation
* See Fig. 4
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
0.63
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
40CPQ... Units
Conditions
Absolute Maximum Ratings
Following any rated
load condition and with
rated V
RRM
applied
Parameters
40CPQ... Units
Conditions
A
V
FM
Max. Forward Voltage Drop
0.49
V
@ 20A
(Per Leg) * See Fig. 1
(1)
0.59
V
@ 40A
0.43
V
@ 20A
0.56
V
@ 40A
I
RM
Max. Reverse Leakage Current
4
mA
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
150
mA
T
J
= 125 C
C
T
Max. Junction Capacitance (Per Leg)
1850
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
40CPQ... Units
Conditions
(1) Pulse Width < 300s, Duty Cycle <2%
Voltage Ratings
Electrical Specifications
I
F(AV)
Max. Average Forward Current
40
A
50% duty cycle @ T
C
= 120 C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
3500
5s Sine or 3s Rect. pulse
Surge Current (Per Leg) * See Fig. 7
430
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
27
mJ
T
J
= 25 C, I
AS
= 4 Amps, L = 3.4 mH
(Per Leg)
I
AR
Repetitive Avalanche Current
4
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
40CPQ035, 40CPQ040, 40CPQ045
Bulletin PD-2.307 rev. B 12/01
3
www.irf.com
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
1
10
100
1000
0
.2
.4
.6
.8
1
1.2
1.4
FM
F
In
s
t
a
n
ta
n
e
o
u
s
F
o
r
w
a
r
d
C
u
r
r
e
n
t
-
I (
A
)
Forward Voltage Drop - V (V)
T = 150C
T = 125C
T = 25C
J
J
J
.001
.01
.1
1
10
100
1000
0
5 10 15 20 25 30 35 40 45
R
R
125C
100C
75C
50C
25C
Reverse Voltage - V (V)
R
ev
e
r
s
e
C
u
r
r
e
n
t
-
I
(
m
A)
T = 150C
J
100
1000
10000
0
10
20
30
40
50
T = 25C
J
Reverse Voltage - V (V)
R
T
J
unc
t
i
on C
apac
i
t
anc
e
-
C
(
p
F
)
.001
.01
.1
1
10
.00001
.0001
.001
.01
.1
1
10
100
D = 0.33
D = 0.50
D = 0.25
D = 0.17
D = 0.08
1
th
J
C
t , Rectangular Pulse Duration (Seconds)
The
r
m
a
l
Im
p
e
d
a
n
c
e
-
Z
(
C
/W
)
Single Pulse
(Thermal Resistance)
2
t
1
t
P
DM
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
J
DM thJC C
2
40CPQ035, 40CPQ040, 40CPQ045
Bulletin PD-2.307 rev. B 12/01
4
www.irf.com
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)
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
Lo
s
s
-
(
W
a
tts
)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
Average Forward Current - I (A)
130
135
140
145
150
155
0
5
10
15
20
25
30
DC
A
l
l
o
wa
b
l
e
Ca
s
e
T
e
m
p
e
ra
t
u
re
- (
C
)
Average Forward Current - I (A)
F(AV)
R (DC) = 1.25C/W
thJC
100
1000
10000
10
100
1000
10000
FS
M
p
Non-Repetitive Surge Current -
I (A)
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
FR EE-W H E EL
D IO D E
40H FL40 S02
C UR RE N T
M O N ITO R
H IG H-SPE ED
SW ITC H
IRFP460
L
D UT
R g = 25 ohm
V d = 25 V olt
+
40CPQ035, 40CPQ040, 40CPQ045
Bulletin PD-2.307 rev. B 12/01
5
www.irf.com
Conform to JEDEC outline TO-247AC (TO-3P)
Dimensions in millimeters and (inches)
Outline Table
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 (0.056)
3.20 (0.126)
MAX.
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.
5.43 (0.213)
5.47 (0.216)
20.30 (0.800)
19.70 (0.775)
1 2 3
DIA.
Marking Information
Base
Common
Cathode
Anode
Anode
Common
Cathode
1
3
2
1
2
2
40CPQ045
58 07
035H
PART NUMBER
LOGO
RECTIFIER
INTERNATIONAL
ASSEMBLY
LOT CODE
LINE H
WEEK 35
YEAR 0 = 2000
DATE CODE
ASSEMBLED ON WW 21, 2000
IN THE ASSEMBLY LINE "L"
WITH LOT CODE 58 07
THIS IS A 40CPQ045
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