I
F(AV)
Rectangular
400
A
waveform
V
RRM
range
35 to 45
V
I
FSM
@ tp = 5 s sine
29,000
A
V
F
@
200Apk, T
J
=125C
0.52
V
(per leg)
T
J
range
- 55 to 150
C
Characteristics
400DMQ... Units
Major Ratings and Characteristics
Description/ Features
The 400DMQ high current, Schottky rectifier doubler module
series 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, convert-
ers, free-wheeling diodes, welding, and reverse battery
protection.
150 C T
J
operation
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
400 Amp
400DMQ... SERIES
1
Bulletin PD-20736 rev. B 10/02
TO-244AB
isolated doubler
Modified JEDEC
Outline TO-244AB Isolated
Dimensions in millimeters and (inches)
1
2
3
www.irf.com
400DMQ... Series
2
Bulletin PD-20736 rev. B 10/02
www.irf.com
Part number
400DMQ035
400DMQ040
400DMQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
Voltage Ratings
Absolute Maximum Ratings
Parameters
400DMQ Units
Conditions
A
I
F(AV)
Max. Average Forward Current
400
A
50% duty cycle @ T
C
= 70 C, rectangular wave form
(Per Device)
I
FSM
Max. Peak One Cycle Non-Repetitive
29,000
5s Sine or 3s Rect. pulse
Surge Current (Per Leg)
3400
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
180
mJ
T
J
= 25 C, I
AS
= 40 Amps, L = 0.22 mH
(Per Leg)
I
AR
Repetitive Avalanche Current
40
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
(1) Pulse Width < 300s, Duty Cycle <2%
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
0.4
C/W DC operation
* See Fig. 4
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
0.2
C/W DC operation
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
0.1
C/W Mounting surface , smooth and greased
to Heatsink
wt
Approximate Weight
79 (2.80)
g (oz.)
T
Mounting Torque Base
Min.
24 (20)
Max.
35 (30)
Mou ue Center Hole
Typ.
13.5 (12)
Terminal Torque
Min.
35 (30)
Max.
46 (40)
Case Style TO - 244AB isolated doubler Modified JEDEC
Thermal-Mechanical Specifications
Parameters
400DMQ Units
Conditions
T
J
= 25 C
V
R
= rated V
R
Kg-cm
(Ibf-in)
Electrical Specifications
35
40
45
V
FM
Max. Forward Voltage Drop
0.57
V
@ 200A
(Per Leg) * See Fig. 1
(1)
0.73
V
@ 400A
0.52
V
@ 200A
0.68
V
@ 400A
I
RM
Max. Reverse Leakage Current
20
mA
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
1
A
T
J
= 125 C
C
T
Max. Junction Capacitance (Per Leg)
10,300
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25C
L
S
Typical Series Inductance (Per Leg)
5.0
nH
From top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change
10000
V/ s
(Rated V
R
)
Parameters
400DMQ Units
Conditions
T
J
= 125 C
Following any rated
load condition and with
rated V
RRM
applied
400DMQ... Series
3
Bulletin PD-20736 rev. B 10/02
www.irf.com
Fig. 1 - Max. Forward Voltage Drop Characteristics
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics
Forward Voltage Drop - V
FM
(V)
Instantaneous Forward Current - I
F
(A)
Reverse Current - I
R
(mA)
Reverse Voltage - V
R
(V)
Reverse Voltage - V
R
(V)
Junction Capacitance - C
T
(pF)
t
1
, Rectangular Pulse Duration (Seconds)
Thermal Impedance Z
thJC
(C/W)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage
0.01
0.1
1
10
100
1000
10000
0
10
20
30
40
50
125C
100C
75C
50C
25C
T = 150C
J
1000
10000
0
10
20
30
40
50
T = 25C
J
0.001
0.01
0.1
1
0.00001
0.0001
0.001
0.01
0.1
1
10
100
Single Pulse
(Thermal Resistance)
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
2
t
1
t
P
DM
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
J
DM
thJC
C
2
1
1
10
100
1000
0
0.3
0.6
0.9
1.2
T = 150C
T = 125C
T = 25C
J
J
J
400DMQ... Series
4
Bulletin PD-20736 rev. B 10/02
www.irf.com
Fig. 8 - Unclamped Inductive Test Circuit
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
(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
= 80% rated V
R
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
(A)
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Max. Non-Repetitive Surge Current
Allowable Case Temperature (C)
Average Power Loss (Watts)
Non-Repetitive Surge Current - I
FSM
(A)
0
100
200
300
400
500
0
100
200
300
400
500
600
DC
RMS Limit
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
1000
10000
100000
10
100
1000
10000
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
0
30
60
90
120
150
180
0
200
400
600
DC
see note (2)
Square wave (D = 0.50)
80% Rated V applied
R
400DMQ... Series
5
Bulletin PD-20736 rev. B 10/02
www.irf.com
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. 10/02
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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