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SCHOTTKY RECTIFIER
40 Amp
Bulletin PD-20544 rev. C 12/01
1
www.irf.com
This 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 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
Description/Features
Major Ratings and Characteristics
I
F(AV)
Rectangular
40
A
waveform
V
RRM
45
V
I
FSM
@ tp = 5 s sine
1240
A
V
F
@
20 Apk, T
J
= 125C
0.48
V
(per leg)
T
J
range
- 55 to 150
C
Characteristics
Values
Units
40CTQ045
40CTQ045S
40CTQ045-1
Case Styles
40CTQ...
40CTQ... S
40CTQ... -1
TO-220
D
2
PAK
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
TO-262
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
40CTQ045, 40CTQ045S, 40CTQ045-1
2
Bulletin PD-20544 rev. C 12/01
www.irf.com
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
Voltage Ratings
Absolute Maximum Ratings
Parameters
Values Units
Conditions
I
F(AV)
Max. Average Forward
(Per Leg)
20
A
50% duty cycle @ T
C
= 116C, 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 = 4.40 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
A
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
2.0
C/W DC operation
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
1.0
C/W DC operation
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
0.50
C/W Mounting surface , smooth and greased
to Heatsink (only for TO-220)
wt
Approximate Weight
2 (0.07)
g (oz.)
T
Mounting Torque
Min.
6 (5)
Max.
12 (10)
Thermal-Mechanical Specifications
Kg-cm
(Ibf-in)
Parameters
Values Units
Conditions
V
FM
Max. Forward Voltage Drop
0.53
V
@ 20A
(Per Leg) * See Fig. 1
(1)
0.68
V
@ 40A
0.48
V
@ 20A
0.67
V
@ 40A
I
RM
Max. Reverse Leakage Current
3
mA
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
115
mA
T
J
= 125 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)
2800
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25C
L
S
Typical Series Inductance (Per Leg)
8.0
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
Electrical Specifications
(1) Pulse Width < 300s, Duty Cycle <2%
V
R
= rated V
R
Parameters
Values Units
Conditions
45
Parameters
40CTQ045
40CTQ045S
40CTQ045-1
Following any rated
load condition and with
rated V
RRM
applied
3
Bulletin PD-20544 rev. C 12/01
www.irf.com
40CTQ045, 40CTQ045S, 40CTQ045-1
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 0
1 0 0
1 00 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
rw
a
r
d
C
u
r
r
e
n
t
-
I
(
A
)
T = 150 C
T = 125 C
T = 25 C
J
J
J
F
FM
Forw a rd V olta g e D rop - V (V )
0.0 0 1
0 .0 1
0 .1
1
1 0
1 00
1 0 00
0
5
1 0
15
20
2 5
3 0
35
4 0
4 5
R
R
125 C
100 C
75 C
50 C
25 C
R
e
ve
rs
e
C
u
rr
e
n
t
-
I
(m
A
)
T = 15 0 C
J
Re verse V oltag e - V (V )
10 0
1 0 00
10 0 00
0
1 0
2 0
30
4 0
5 0
T = 25 C
J
R
T
J
u
n
c
ti
o
n
C
a
p
a
c
i
ta
n
c
e

-
C

(
p
F
)
Re ve rse V oltag e - V (V )
0.0 1
0.1
1
1 0
0.000 01
0.0 001
0.0 01
0 .01
0 .1
1
10
10 0
th
J
C
t , R ec ta ng ula r Pu lse Du ra tio n (Sec o n d s)
Sing le Pulse
(Therm a l R esista n c e)
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
N ote s:
1. D uty fac tor D = t / t
2. Peak T = P x Z + T
1
2
C
thJ C
D M
J
2
t
1
t
P
D M
40CTQ045, 40CTQ045S, 40CTQ045-1
4
Bulletin PD-20544 rev. C 12/01
www.irf.com
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
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
FR EE-W H E EL
D IO D E
40H FL40 S02
C U R RE N T
M O N ITO R
H IG H-SP E ED
SW ITC H
IRFP460
L
D U T
R g = 25 ohm
V d = 25 V o lt
+
1 00
1 05
1 10
1 15
1 20
1 25
1 30
1 35
1 40
1 45
1 50
0
5
10
1 5
2 0
2 5
30
D C
A
l
l
o
w
a
b
l
e
C
a
s
e

T
e
m
p
er
a
t
ur
e -
(
C
)
F(A V )
A ve rag e Forw a rd C urren t - I (A )
se e n o te (2)
Sq uare w a ve (D = 0.50)
80% Rate d V a pp lie d
R
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
0
5
1 0
15
2 0
25
3 0
D C
Av
e
r
a
g
e
P
o
w
e
r
L
o
s
s

-
(
W
a
t
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 vera g e Forw a rd C urre n t - I (A)
100
1000
10000
10
100
1000
10000
FS
M
N
o
n
-
R
e
p
e
t
i
t
i
v
e
S
u
rg
e
C
u
rr
e
n
t
-
I
(
A
)
p
At Any Rated Load C ondition
An d W ith Ra te d V Ap plied
Follow in g Surg e
RRM
Square W ave Pulse D uration - t (m ic rose c)
5
Bulletin PD-20544 rev. C 12/01
www.irf.com
40CTQ045, 40CTQ045S, 40CTQ045-1
Outline Table
3.78 (0.15)
3.54 (0.14)
10.54 (0.41)
MAX.
DIA.
15.24 (0.60)
14.84 (0.58)
2.92 (0.11)
2.54 (0.10)
1
TERM 2
14.09 (0.55)
13.47 (0.53)
3.96 (0.16)
3.55 (0.14)
0.94 (0.04)
0.69 (0.03)
4.57 (0.18)
4.32 (0.17)
3
0.61 (0.02) MAX.
5.08 (0.20) REF.
1.32 (0.05)
1.22 (0.05)
6.48 (0.25)
6.23 (0.24)
2
0.10 (0.004)
1.40 (0.05)
1.15 (0.04)
2.89 (0.11)
2.64 (0.10)
1
3
2.04 (0.080) MAX.
2
2
Dimensions in millimeters and (inches)
Conform to JEDEC outline TO-220AB
2
BASE
COMMON
CATHODE
1
2
3
ANODE
COMMON
CATHODE
ANODE
1
2
10.16 (0.40)
REF.
8.89 (0.35)
4.57 (0.18)
4.32 (0.17)
0.61 (0.02) MAX.
5.08 (0.20) REF.
1.32 (0.05)
1.22 (0.05)
1
3
6.47 (0.25)
6.18 (0.24)
93
REF.
2.61 (0.10)
2.32 (0.09)
5.28 (0.21)
4.78 (0.19)
4.69 (0.18)
4.20 (0.16)
0.55 (0.02)
0.46 (0.02)
14.73 (0.58)
15.49 (0.61)
1.40 (0.055)
1.14 (0.045)
3X
0.93 (0.37)
0.69 (0.27)
2X
11.43 (0.45)
17.78 (0.70)
8.89 (0.35)
3.81 (0.15)
2.08 (0.08)
2X
2.54 (0.10)
2X
MINIMUM RECOMMENDED FOOTPRINT
2
Dimensions in millimeters and (inches)
Conform to JEDEC outline D
2
Pak (SMD-220)
2
BASE
COMMON
CATHODE
1
2
3
ANODE
COMMON
CATHODE
ANODE
1
2