Bulletin PD-20481 10/01
300CNQ... SERIES
SCHOTTKY RECTIFIER
300 Amp
TO-244AB
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
range
I
FSM
@ tp = 5 µs sine
V
F
T
J
@ 150Apk, T
J
=125°C
(per leg)
range
Description/Features
The 300CNQ 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 150 °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.
150 °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
10.41 [.410]
9.65 [.380]
300CNQ... Units
300
35 to 45
27000
0.62
- 55 to 150
A
V
A
V
°C
80.01 [3.150]
40.26 [1.585]
39.75 [1.565]
COMMON
CATHODE
Ø
20.32 [.800]
17.78 [.700]
LUG
TERMINAL
ANODE 1
LUG
TERMINAL
ANODE 2
2X Ø
7.49 [.295]
6.99 [.275]
34.925 [1.375]
REF.
63.50 [2.500]
60.96 [2.400]
Ø
4.95 [.195]
4.70 [.185]
1/4-20 SLOTTED HEX
BASE
COMMON CATHODE
23.55 [.927]
20.42 [.804]
15.75 [.620]
14.99 [.590]
3.35 [.132]
3.02 [.119]
92.71 [3.650]
90.17 [3.550]
NOTES:
1. DIMENSIONS ARE SHOWN IN MILLIMETERS [INCHES].
2. CONTROLLING DIMENSION: MILLIMETER
Modified JEDEC
Outline TO-244AB
Dimensions in millimeters and (inches)
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1
300CNQ... Series
Bulletin PD-20481 10/01
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
300CNQ035
35
300CNQ040
40
300CNQ045
45
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward
Current
I
FSM
E
AS
I
AR
* See Fig. 5
(Per Leg)
(Per Device)
300CNQ Units
150
300
27000
2400
150
30
A
mJ
A
A
Conditions
50% duty cycle @ T
C
= 104 °C, rectangular wave form
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
5µs Sine or 3µs Rect. pulse
T
J
= 25 °C, I
AS
= 30 Amps, L = 0.67 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg) * See Fig. 7
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
(Per Leg)
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
300CNQ Units
0.61
0.77
0.62
0.75
15
750
7750
6.0
10000
V
V
V
V
mA
mA
pF
nH
V/ µs
@ 150A
@ 300A
@ 150A
@ 300A
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
C
T
L
S
Max. Reverse Leakage Current
(Per Leg) * See Fig. 2
(1)
Max. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
(Rated V
R
)
T
J
= 25 °C
T
J
= 125 °C
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25°C
From top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change
(1) Pulse Width < 300µs, Duty Cycle <2%
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
300CNQ Units
- 55 to 150
- 55 to 150
0.30
0.15
0.10
79 (2.80)
Min.
Max.
Typ.
Min.
Max.
°C
°C
Conditions
R
thJC
Max. Thermal Resistance Junction
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
to Heatsink
wt
T
Approximate Weight
Mounting Torque Base
Mounting Torque Center Hole
Terminal Torque
Case Style
°C/W DC operation
°C/W DC operation
* See Fig. 4
°C/W Mounting surface , smooth and greased
g (oz.)
24 (20)
35 (30)
Kg-cm
13.5 (12) (Ibf-in)
35 (30)
46 (40)
TO - 244AB
Modified JEDEC
2
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300CNQ... Series
Bulletin PD-20481 10/01
1000
(mA)
10000
Tj = 150˚C
1000
100
10
1
0.1
0.01
0
5
125˚C
100˚C
75˚C
50˚C
25˚C
Instantaneous Forward Current - I
100
Reverse Current - I
F
(A)
R
10 15 20 25 30 35 40 45
Reverse Voltage - V
R
(V)
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
10000
10
(pF)
Tj = 25˚C
Tj = 150˚C
Tj = 125˚C
Tj = 25˚C
1
0
0.2
Forward Voltage Drop - V
FM
(V)
Junction Capacitance - C
T
1000
0.4
0.6
0.8
1
1.2
1.4
0
Fig. 1 - Maximum Forward Voltage Drop Characteristics
Reverse Voltage - V
R
(V)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
5
10 15 20 25 30 35 40 45
1
(°C/W)
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
thJC
Thermal Impedance Z
0.1
P
DM
t1
0.01
Single Pulse
(Thermal Resistance)
t2
Notes:
1. Duty factor D = t1/ t2
2. Peak Tj = Pdm x ZthJC + Tc
0.001
0.00001
0.0001
0.001
0.01
0.1
1
10
t
1
, Rectangular Pulse Duration (Seconds)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics
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300CNQ... Series
Bulletin PD-20481 10/01
160
Allowable Case Temperature (°C)
140
Average Power Loss (Watts)
150
140
130
120
110
100
Square wave (D = 0.50)
90
80% Rated Vr applied
80
70
see note (2)
60
0
50
100
150
200
F(AV)
120
100
RMS Limit
DC
DC
80
60
40
20
0
0
50
100
150
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
250
(A)
200
F(AV)
250
(A)
Average Forward Current - I
Average Forward Current - I
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss
Characteristics
(A)
100000
At Any Rated Load Condition
And With Rated Vrrm Applied
Following Surge
Non-Repetitive Surge Current - I
FSM
10000
1000
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
(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
4
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300CNQ... Series
Bulletin PD-20481 10/01
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.
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. 10/01
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