The 409DMQ Schottky rectifier doubler module 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
high current switching power supplies, plating power supplies,
UPS systems, converters, free-wheeling diodes, welding, and
reverse battery protection.
175 C T
J
operation
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Description/ Features
Major Ratings and Characteristics
I
F(AV)
Rectangular
400
A
waveform
V
RRM
135 to 150
V
I
FSM
@ tp = 5 s sine
25,500
A
V
F
@
200Apk, T
J
=125C
0.72
V
(per leg)
T
J
range
- 55 to 175
C
Characteristics
409DMQ... Units
SCHOTTKY RECTIFIER
409DMQ... Series
400 Amp
Bulletin PD-20724 rev. B 10/02
1
TO-244AB
isolated doubler
Modified JEDEC
Outline TO-244AB Isolated
Dimensions in millimeters and (inches)
1
2
3
www.irf.com
409DMQ... Series
2
Bulletin PD-20724 rev. B 10/02
www.irf.com
Parameters
409DMQ135
409DMQ150
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
135
150
Voltage Ratings
Absolute Maximum Ratings
Following any rated
load condition and with
rated V
RRM
applied
Parameters
409DMQ Units
Conditions
A
I
F(AV)
Max. Average Forward
400
A
50% duty cycle @ T
C
= 80 C, rectangular wave form
Current ( Per Device )
I
FSM
Max. Peak One Cycle Non-Repetitive
20000
5s Sine or 3s Rect. pulse
Surge Current (Per Leg)
2300
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
15
mJ
T
J
= 25 C, I
AS
= 1 Amps, L = 30 mH
(Per Leg)
I
AR
Repetitive Avalanche Current
1
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 175
C
T
stg
Max. Storage Temperature Range
-55 to 175
C
R
thJC
Max. Thermal Resistance Junction
0.4
C/W DC operation
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)
Mounting Torque 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
409DMQ Units
Conditions
V
FM
Max. Forward Voltage Drop
1.03
V
@ 200A
(Per Leg)
(1)
1.21
V
@ 400A
0.71
V
@ 200A
0.82
V
@ 400A
I
RM
Max. Reverse Leakage Current
6
mA
T
J
= 25 C
(Per Leg)
(1)
85
mA
T
J
= 125 C
C
T
Max. Junction Capacitance (Per Leg)
6000
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
)
T
J
= 25 C
T
J
= 125 C
V
R
= rated V
R
Parameters
409DMQ Units
Conditions
Kg-cm
(Ibf-in)
Electrical Specifications
409DMQ... Series
3
Bulletin PD-20724 rev. B 10/02
www.irf.com
1
10
100
1000
0
0.4
0.8
1.2
1.6
2
T = 150C
T = 125C
T = 25C
J
J
J
0.001
0.01
0.1
1
10
100
1000
0
30
60
90
120
150
150C
125C
100C
75C
50C
25C
T = 175C
J
100
1000
10000
0
30
60
90
120
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
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage
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
409DMQ... Series
4
Bulletin PD-20724 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
40
60
80
100
120
140
160
180
0
200
400
600
DC
see note (2)
Square wave (D = 0.50)
Rated V applied
R
0
100
200
300
400
500
600
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
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)
409DMQ... Series
5
Bulletin PD-20724 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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