I
F(AV)
Rectangular
40
A
waveform
V
RRM
150
V
I
FSM
@ tp = 5 s sine
1500
A
V
F
@
20 Apk, T
J
=125C
0.71
V
(per leg)
T
J
- 55 to 175
C
Characteristics
40CTQ... Units
Major Ratings and Characteristics
Description/ Features
The 40CTQ... center tap Schottky rectifier has been opti-
mized for very low forward voltage drop, with moderate
leakage. The proprietary barrier technology allows for
reliable operation up to 175 C junction temperature. Typical
applications are in switching power supplies, converters,
free-wheeling diodes, and reverse battery protection.
175 C T
J
operation
Center tap TO-220 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
Bulletin PD-20694 rev. B 07/03
1
www.irf.com
40CTQ150
40CTQ150S
40CTQ150-1
40CTQ150
TO-220AB
Case Styles
40CTQ150S
D
2
PAK
40CTQ150-1
TO-262
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
Bulletin PD-20694 rev. B 07/03
2
www.irf.com
40CTQ150, 40CTQ150S, 40CTQ150-1
Part number
Value
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
150
T
J
Max. Junction Temperature Range
-55 to 175
C
T
stg
Max. Storage Temperature Range
-55 to 175
C
R
thJC
Max. Thermal Resistance
Per Leg
1.5
C/W DC operation
* See Fig. 4
Junction to Case
R
thJC
Max. Thermal Resistance Per Package
0.75
C/W DC operation
Junction to Case
R
thCS
Typical Thermal Resistance,
0.5
C/W Mounting surface , smooth and greased
Case to Heatsink
wt
Approximate Weight
2 (0.07)
g (oz.)
T
Mounting Torque
Min.
6 (5)
Non-lubricated threads
Max.
12 (10)
Thermal-Mechanical Specifications
Kg-cm
(Ibf-in)
Parameters
40CTQ.. Units
Conditions
Absolute Maximum Ratings
Parameters
40CTQ.. Units
Conditions
A
V
FM
Max. Forward Voltage Drop
0.93
V
@ 20A
(Per Leg) * See Fig. 1
(1)
1.16
V
@ 40A
0.71
V
@ 20A
0.85
V
@ 40A
I
RM
Max. Reverse Leakage Current
50
A
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
15
mA
T
J
= 125 C
C
T
Max. Junction Capacitance (Per Leg)
450
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
V
R
= rated V
R
Parameters
40CTQ.. Units
Conditions
(1) Pulse Width < 300s, Duty Cycle <2%
Voltage Ratings
Electrical Specifications
I
F(AV)
Max. Average Forward (Per Leg)
20
A
50% duty cycle @ T
C
= 140 C, rectangular wave form
Current * See Fig. 5
(Per Device)
40
I
FSM
Max. Peak One Cycle Non-Repetitive
1500
5s Sine or 3s Rect. pulse
Surge Current (Per Leg) * See Fig. 7
250
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
1.0
mJ
T
J
= 25 C, I
AS
= 1.5 Amps, L = 0.9 mH
(Per Leg)
I
AR
Repetitive Avalanche Current
1.5
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
Following any rated
load condition and with
rated V
RRM
applied
Bulletin PD-20694 rev. B 07/03
3
www.irf.com
40CTQ150, 40CTQ150S, 40CTQ150-1
Fig. 1 - Maximum Forward Voltage Drop Characteristics
Reverse Voltage - V
R
(V)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Forward Voltage Drop - V
FM
(V)
Instantaneous Forward Current - I
F
(A)
Reverse Voltage - V
R
(V)
Junction Capacitance - C
T
(
p
F
)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics
t
1
, Rectangular Pulse Duration (Seconds)
Thermal Impedance Z
thJC
(C/W)
Reverse Current - I
R
(mA)
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
10
100
1000
0
40
80
120
160
T = 25C
J
1
10
100
0
0.4
0.8
1.2
1.6
Tj = 175C
Tj = 125C
Tj = 25C
0.001
0.01
0.1
1
10
100
1000
0
20 40 60 80 100 120 140 160
100C
75C
50C
25C
Tj = 175C
125C
150C
0.01
0.1
1
10
0.00001
0.0001
0.001
0.01
0.1
1
10
100
Single Pulse
(Thermal Resistance)
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Notes:
1. Duty factor D = t1/ t 2
2. Peak Tj = Pdmx ZthJC + Tc
2
t
1
t
P
DM
Bulletin PD-20694 rev. B 07/03
4
www.irf.com
40CTQ150, 40CTQ150S, 40CTQ150-1
0
5
10
15
20
25
0
5
10
15
20
25
30
RMS Limit
DC
DC = 0.20
DC = 0.25
DC = 0.33
DC = 0.50
DC = 0.75
100
120
140
160
180
0
5
10
15
20
25
30
DC
Square wave (D = 0.50)
80% Vr applied
see note (2)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current
Average Forward Current - I
F
(AV)
(A)
Allowable Case Temperature (C)
Fig. 6 - Forward Power Loss Characteristics
Average Forward Current - I
F
(AV)
(A)
Average Power Loss ( Watts )
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Square Wave Pulse Duration - t
p
(microsec)
Non-Repetitive Surge Current - I
FSM
(A)
(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
R
= 80% V
R
applied
100
1000
10000
10
100
1000
10000
At Any Rated Load Condition
And With Rated Vrrm Applied
Following Surge
Bulletin PD-20694 rev. B 07/03
5
www.irf.com
40CTQ150, 40CTQ150S, 40CTQ150-1
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
Conform to JEDEC outline TO-220AB
Dimensions in millimeters and (inches)
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
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