I
F(AV)
Rectangular
300
A
waveform
V
RRM
range
80 to 100
V
I
FSM
@ tp = 5 s sine
22,000
A
V
F
@
150Apk, T
J
=125C
0.72
V
(per leg)
T
J
range
- 55 to 175
C
Characteristics
303CNQ... Units
Major Ratings and Characteristics
The 303CNQ 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 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
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
300 Amp
303CNQ... SERIES
Bulletin PD-2.234 rev. E 05/02
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
303CNQ... Series
2
Bulletin PD-2.234 rev. E 05/02
www.irf.com
Absolute Maximum Ratings
Following any rated
load condition and with
rated V
RRM
applied
Parameters
303CNQ Units Conditions
A
I
F(AV)
Max. Average Forward Current
300
A
50% duty cycle @ T
C
= 126 C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
22,000
5s Sine or 3s Rect. pulse
Surge Current (Per Leg) * See Fig. 7
2500
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
0.30
C/W DC operation
* See Fig. 4
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
0.15
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
303CNQ Units Conditions
V
FM
Max. Forward Voltage Drop
0.91
V
@ 150A
(Per Leg) * See Fig. 1
(1)
1.09
V
@ 300A
0.72
V
@ 150A
0.85
V
@ 300A
I
RM
Max. Reverse Leakage Current
4.5
mA
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
60
mA
T
J
= 125 C
C
T
Max. Junction Capacitance (Per Leg)
4150
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25C
L
S
Typical Series Inductance (Per Leg)
6.0
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
303CNQ Units Conditions
Kg-cm
(Ibf-in)
Electrical Specifications
Part number
303CNQ080
303CNQ090
303CNQ100
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
Voltage Ratings
80
90
100
303CNQ... Series
3
Bulletin PD-2.234 rev. E 05/02
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
.2
.4
.6
.8
1
1.2
1.4
1.6
T = 175C
T = 125C
T = 25C
J
J
J
.001
.01
.1
1
10
100
1000
0
20
40
60
80
100
T = 175C
150C
125C
100C
75C
50C
25C
J
100
1000
10000
0 10 20 30 40 50 60 70 80 90 100110
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)
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)
303CNQ... Series
4
Bulletin PD-2.234 rev. E 05/02
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)
120
130
140
150
160
170
180
0
40
80
120
160
200
240
DC
303CNQ
R (DC) = 0.30C/W
thJC
0
25
50
75
100
125
150
0
40
80
120
160
200
240
DC
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
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)
303CNQ... Series
5
Bulletin PD-2.234 rev. E 05/02
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. 05/02
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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