IF(AV) Rectangular 300 A
waveform
VRRM range 80 to 100 V
IFSM @ tp = 5 µs sine 22,000 A
VF@
150Apk, TJ=125°C 0.72 V
(per leg)
TJrange - 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 TJ 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 Ø
10.41 [.410]
9.65 [.380]
Ø
4.70 [.185]
4.95 [.195]
1/4-20 SLOTTED HEX
COMMON
CATHODE
REF.
TERMINAL
LUG
COMMON CATHODE
ANODE 1
TERMINAL
LUG
Ø
NOTES:
1. DIMENSIONS ARE SHOWN IN MILLIMETERS [INCHES].
2. CONTROLLING DIMENSION: MILLIMETER
Modified JEDEC
Outline TO-244AB
Dimensions in millimeters and (inches)
1www.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 VRRM applied
Parameters 303CNQ Units Conditions
A
IF(AV) Max. Average Forward Current 300 A 50% duty cycle @ TC = 126 °C, rectangular wave form
* See Fig. 5
IFSM Max. Peak One Cycle Non-Repetitive 22,000 5µs Sine or 3µs Rect. pulse
Surge Current (Per Leg) * See Fig. 7 2500 10ms Sine or 6ms Rect. pulse
EAS Non-Repetitive Avalanche Energy 15 mJ TJ = 25 °C, IAS
= 1 Amps, L = 30 mH
(Per Leg)
IAR Repetitive Avalanche Current 1 A Current decaying linearly to zero in 1 µsec
(Per Leg) Frequency limited by TJ max. VA = 1.5 x VR typical
(1) Pulse Width < 300µs, Duty Cycle <2%
TJMax. Junction Temperature Range -55 to 175 °C
Tstg Max. Storage Temperature Range -55 to 175 °C
RthJC Max. Thermal Resistance Junction 0.30 °C/W DC operation * See Fig. 4
to Case (Per Leg)
RthJC Max. Thermal Resistance Junction 0.15 °C/W DC operation
to Case (Per Package)
RthCS 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
VFM 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
IRM Max. Reverse Leakage Current 4.5 mA TJ = 25 °C
(Per Leg) * See Fig. 2 (1) 60 mA TJ = 125 °C
CTMax. Junction Capacitance (Per Leg) 4150 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance (Per Leg) 6.0 nH From top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change 10000 V/ µs
(Rated VR)
TJ = 25 °C
TJ = 125 °C
VR = rated VR
Parameters 303CNQ Units Conditions
Kg-cm
(Ibf-in)
Electrical Specifications
Part number 303CNQ080 303CNQ090 303CNQ100
VRMax. DC Reverse Voltage (V)
VRWM 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 ZthJC Characteristics (Per Leg)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
1
10
100
1000
0.2.4.6.811.21.41.6
T = 175°C
T = 125°C
T = 25°C
J
J
J
.001
.01
.1
1
10
100
1000
0 20406080100
T = 175°C
150°C
125°C
100°C
75°C
50°C
25°C
J
100
1000
10000
0 102030405060708090100110
T = 25°C
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 Resi stance)
2
t
1
t
P
DM
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
JDMthJC
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)
t1, 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) = 0.30°C/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 Li mit
1000
10000
100000
10 100 1000 10000
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
FREE-WHEEL
DIO DE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SW ITCH
IRFP460
L
DUT
Rg = 25 ohm Vd = 25 Volt
+
Average Forward Current - IF(AV)
(A)
Allowable Case Temperature (°C)
Average Forward Current - IF
(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.
