PD-2.244 rev. A 12/97
40CDQ... SERIES
SCHOTTKY RECTIFIER
40 Amp
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
I
FSM
@ tp = 5 µs sine
V
F
T
J
@ 20 Apk, T
J
= 125°C
(per leg)
35 to 45
2000
0.55
V
A
V
Description/Features
Units
A
The 40CDQ center tap Schottky rectifier series has been
optimized for low reverse leakage at high temperature. 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-3 package
Low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Hermetic packaging
40CDQ...
40
- 65 to 175
°C
CASE STYLE AND DIMENSIONS
Conforms to JEDEC Outline TO-204AA (TO-3)
Dimensions in millimeters and inches
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1
40CDQ... Series
PD-2.244 rev. A
12/97
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
35
40
45
V
RWM
Max. Working Peak Reverse Voltage (V)
40CDQ035
40CDQ040
40CDQ045
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
* See Fig. 5
I
FSM
E
AS
I
AR
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg) * See Fig. 7
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
(Per Leg)
2000
400
27
4
A
mJ
A
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
5µs Sine or 3µs Rect. pulse
T
J
= 25 °C, I
AS
= 4 Amps, L = 3.4 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
40CDQ Units
40
A
Conditions
50% duty cycle @ T
C
= 135 °C, rectangular wave form
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
40CDQ Units
0.62
0.79
0.55
0.71
2.5
25
1400
10.0
10,000
V
V
V
V
mA
mA
pF
nH
V/ µs
@ 20A
@ 40A
@ 20A
@ 40A
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
C
T
L
S
Max. Reverse Leakage Current
(Per Leg) * See Fig. 2
(1)
Max. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
T
J
= 25 °C
T
J
= 125 °C
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25°C
Measured mounting plane to lead 5mm from
package body
dv/dt Max. Voltage Rate of Change
(Rated V
R
)
(1) Pulse Width < 300µs, Duty Cycle <2%
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
40CDQ Units
-65 to 175
-65 to 175
2.20
1.10
0.20
11.4(0.40)
Min.
Max.
12(10)
17(15)
°C
°C
Conditions
R
thJC
Max. Thermal Resistance Junction
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
to Heatsink
wt
T
Approximate Weight
Mounting Torque
Case Style
°C/W DCoperation
°C/W DCoperation
* See Fig. 4
°C/W Mounting surface , smooth and greased
g (oz.)
Kg-cm
(Ibf-in)
TO-204AA (TO-3) JEDEC
2
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40CDQ... Series
PD-2.244 rev. A
12/97
10
00
10
00
10
0
R v r eC r n - I (m )
e e s u re t
A
R
1
0
1 5C
2°
1
.
1
.0
1
2°
5C
.0 1
0
. 01
00
0
1 0C
0°
7°
5C
5°
0C
T =1 5 C
7°
J
1 0C
5°
10
0
In n n o s F r a C rr n - I ( )
sta ta e u o w rd u e t
A
F
5
1 1 2 2 3 3 4 4
0 5 0 5 0 5 0 5
R v r eV lta e- V (V
e es o g
R )
1
0
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
T =1 5 C
7°
J
T =1 5 C
2°
J
T= 2 °
5C
J
1
J n tio C p c n e -C (p )
u c n a a ita c
F
T
100
00
T =2 °
5C
J
10
00
.1
0
.2
.4
.6
.8
1
1
.2 1
.4 1
.6 1
.8
10
0
0
1
0
2
0
3
0
4
0
5
0
F r a V lta eD p- V M V
o w rd o g ro
F ( )
R v r eV lt g -V (V
e es o a e R )
Fig. 1 - Max. Forward Voltage Drop Characteristics
(PerLeg)
1
0
T e m l I p d n e- Z
h r a me a c
(C )
° /W
th C
J
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
1
.
1
D=0 0
.5
D=0 3
.3
D=0 5
.2
D=0 7
.1
D=0 8
.0
P
M
D
t
1
t2
N te :
o s
1 D tyfa to D= t1/ t2
. u
c r
.0
1
S g P ls
in le u e
(T e m l R s ta c )
h r a e is n e
.0 1
0
.0 0 1
00
. 01
00
.0 1
0
.1
0
.
1
2 P a T =P xZ
. ek
+T
J D
M th C C
J
1
1
0
10
0
t1, R c n u r P ls D ra n( e o d )
e ta g la u e u tio S c n s
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
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3
40CDQ... Series
PD-2.244 rev. A
12/97
10
8
A w b C s T m ea re- ( C
llo a le a e e p r tu
° )
4C Q
0 D
Rh C ( C =22 ° /
. 0 CW
tJ D)
1
6
D=0 8
.0
D=0 7
.1
D=0 5
.2
1 D=0 3
2
.3
D=0 0
.5
R SL it
M im
10
7
10
6
A e g P w r L s - (W tt )
v ra e o e o s
as
8
D
C
10
5
D
C
4
10
4
10
3
0
5
1
0
1
5
2
0
2
5
0
3
0
0
5
1
0
1
5
2
0
2
5
FA )
( V
( )
A
3
0
A e a e F rw rdC rr n - IFA ) (A
vrg o a
uet
)
( V
A e g F r a C r n -I
v ra e o w rd ure t
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
10000
(A)
At Any Rated Load Condition
And With Rated
RRM
Applied
V
Following Surge
FSM
Fig. 6 - Forward Power Loss Characteristics
(PerLeg)
Non-Repetitive Surge Current - I
1000
100
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
HIGH-SPEED
SWITCH
FREE-WHEEL
DIODE
40HFL40S02
Vd = 25 Volt
DUT
IRFP460
Rg = 25 ohm
+
CURRENT
MONITOR
Fig. 8 - Unclamped Inductive Test Circuit
4
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