444cnq-revB
I
F(AV)
Rectangular
440
A
waveform
V
RRM
range
35 to 45
V
I
FSM
@ tp = 5 s sine
35,000
A
V
F
@
220Apk, T
J
=125C
0.51
V
(per leg)
T
J
range
- 55 to 125
C
Characteristics
444CNQ... Units
Major Ratings and Characteristics
The 444CNQ center tap Schottky rectifier module series has
been optimized for low reverse leakage at high temperature.
The proprietary barrier technology allows for reliable opera-
tion up to 125 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.
125 C T
J
operation
Center tap module
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
TO-244AB
SCHOTTKY RECTIFIER
440 Amp
444CNQ... SERIES
Bulletin PD-2.243 rev. C 07/01
BASE
ANODE 2
63.50 [2.500]
60.96 [2.400]
23.55 [.927]
20.42 [.804]
14.99 [.590]
15.75 [.620]
20.32 [.800]
17.78 [.700]
39.75 [1.565]
40.26 [1.585]
80.01 [3.150]
34.925 [1.375]
3.35 [.132]
3.02 [.119]
90.17 [3.550]
92.71 [3.650]
7.49 [.295]
6.99 [.275]
2X
10.41 [.410]
9.65 [.380]
4.70 [.185]
4.95 [.195]
1/4-20 SLOTTED HEX
COMMON
CATHODE
REF.
TERMINAL
LUG
COMMON CATHODE
ANODE 1
TERMINAL
LUG
NOTES:
1. DIMENSIONS ARE SHOWN IN MILLIMETERS [INCHES].
2. CONTROLLING DIMENSION: MILLIMETER
Modified JEDEC
Outline TO-244AB
Dimensions in millimeters and (inches)
1
www.irf.com
444CNQ... Series
2
Bulletin PD-2.243 rev. C 07/01
www.irf.com
I
F(AV)
Max. Average Forward Current
440
A
50% duty cycle @ T
C
= 81 C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
35,000
5s Sine or 3s Rect. pulse
Surge Current (Per Leg) * See Fig. 7
3800
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
270
mJ
T
J
= 25 C, I
AS
= 40 Amps, L = 0.34 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
Part number
444CNQ035
444CNQ040
444CNQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
Voltage Ratings
Absolute Maximum Ratings
Following any rated
load condition and with
rated V
RRM
applied
Parameters
444CNQ Units Conditions
A
T
J
Max. Junction Temperature Range
-55 to 125
C
T
stg
Max. Storage Temperature Range
-55 to 125
C
R
thJC
Max. Thermal Resistance Junction
0.20
C/W DC operation
* See Fig. 4
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
0.10
C/W DC operation
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
0.10
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
Modified JEDEC
Thermal-Mechanical Specifications
Parameters
444CNQ 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
0.53
V
@ 220A
(Per Leg) * See Fig. 1
(1)
0.69
V
@ 440A
0.51
V
@ 220A
0.68
V
@ 440A
I
RM
Max. Reverse Leakage Current
20
mA
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
2400
mA
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
10,000
V/ s
(Rated V
R
)
Parameters
444CNQ Units Conditions
T
J
= 100 C
(1) Pulse Width < 300s, Duty Cycle <2%
444CNQ... Series
3
Bulletin PD-2.243 rev. C 07/01
www.irf.com
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
10
100
1000
0
.1 .2 .3 .4 .5 .6 .7 .8 .9
1 1.1
T = 125C
T = 100C
T = 25C
J
J
J
.1
1
10
100
1000
10000
0
5 10 15 20 25 30 35 40 45
100C
75C
50C
25C
T = 125C
J
1000
10000
0
10
20
30
40
50
T = 25C
J
.001
.01
.1
1
.00001
.0001
.001
.01
.1
1
10
100
D = 0.33
D = 0.50
D = 0.25
D = 0.17
D = 0.08
Single Pulse
(Thermal Resistance)
2
t
1
t
P
DM
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
J
DM thJC C
2
Forward Voltage Drop - V
FM
(V)
Reverse Voltage - V
R
(V)
Reverse Current - I
R
(mA)
Junction Capacitance - C
T
(p F)
Reverse Voltage - V
R
(V)
t
1
, Rectangular Pulse Duration (Seconds)
Thermal Impedance Z
thJC
(C/W)
Instantaneous Forward Current - I
F
(A)
444CNQ... Series
4
Bulletin PD-2.243 rev. C 07/01
www.irf.com
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
0
25
50
75
100
125
150
175
200
0
50 100 150 200 250 300 350
DC
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
80
90
100
110
120
130
0
50 100 150 200 250 300 350
DC
444CNQ
R (DC) = 0.20C/W
thJC
1000
10000
100000
10
100
1000
10000
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
FRE E-W H EEL
D IO D E
40H FL40S02
C UR RE N T
M O N ITO R
H IG H -SPE ED
SW IT C H
IRFP460
L
D UT
R g = 2 5 oh m
V d = 25 V olt
+
Average Forward Current - I
F(AV)
(A)
Allowable Case Temperature (C)
Average Forward Current - I
F(AV)
(A)
Average Power Loss (Watts)
Square Wave Pulse Duration - t
p
(microsec)
Non-Repetitive Surge Current - I
FSM
(A)
444CNQ... Series
5
Bulletin PD-2.243 rev. C 07/01
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. 07/01
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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