Major Ratings and Characteristics
I
F(AV)
Rectangular
240
A
waveform
V
RRM
range
80 to 100
V
I
FSM
@ tp = 5 s sine
25,500
A
V
F
@
240Apk, T
J
=125C
0.72
V
T
J
range
- 55 to 175
C
Characteristics
243NQ...
Units
Description/Features
The 243NQ high current 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 switching power supplies, converters, free-wheeling
diodes, and reverse battery protection.
175 C T
J
operation
Unique high power, Half-Pak module
Replaces four parallel DO-5's
Easier to mount and lower profile than DO-5's
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
SCHOTTKY RECTIFIER
240 Amp
243NQ...(R) SERIES
Bulletin PD-2.262 rev. B 05/02
1
www.irf.com
D-67
Outline D-67 HALF PAK Module
Dimensions in millimeters and (inches)
243NQ100
Lug Terminal Anode
Base Cathode
243NQ100R
Lug Terminal Cathode
Base Anode
243NQ...(R) Series
Bulletin PD-2.262 rev. B 05/02
2
www.irf.com
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
0.20
C/W DC operation * See Fig. 4
to Case
R
thCS
Typical Thermal Resistance, Case to
0.15
C/W Mounting surface , smooth and greased
Heatsink
wt
Approximate Weight
25.6 (0.9) g (oz.)
T
Mounting Torque
Min.
40 (35)
Non-lubricated threads
Max.
58 (50)
Terminal Torque
Min.
58 (50)
Max.
86 (75)
Case Style
HALF PAK Module
Thermal-Mechanical Specifications
Parameters
243NQ Units
Conditions
Kg-cm
(Ibf-in)
V
FM
Max. Forward Voltage Drop (1)
0.86
V
@ 240A
* See Fig. 1
1.01
V
@ 480A
0.72
V
@ 240A
0.86
V
@ 480A
I
RM
Max. Reverse Leakage Current (1)
6
mA
T
J
= 25 C
* See Fig. 2
80
mA
T
J
= 125 C
C
T
Max. Junction Capacitance
5500
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 C
L
S
Typical Series Inductance
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
243NQ Units
Conditions
(1) Pulse Width < 300s, Duty Cycle < 2%
Electrical Specifications
I
F(AV)
Max. Average Forward Current
240
A
50% duty cycle @ T
C
= 120 C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
25,500
5s Sine or 3s Rect. pulse
Surge Current * See Fig. 7
3300
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
I
AR
Repetitive Avalanche Current
1
A
Current decaying linearly to zero in 1 sec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Parameters
243NQ Units
Conditions
Absolute Maximum Ratings
A
Following any rated
load condition and
with rated V
RRM
applied
Part number
243NQ080
243NQ090
243NQ100
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
Voltage Ratings
80
90
100
243NQ...(R) Series
Bulletin PD-2.262 rev. B 05/02
3
www.irf.com
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
Fig. 1 - Maximum Forward Voltage Drop Characteristics
.001
.01
.1
1
10
100
1000
0
20
40
60
80
100
R
R
T = 175C
150C
125C
100C
75C
50C
25C
J
Reverse Voltage - V (V)
R
ev
e
r
s
e
C
u
r
r
e
n
t
-
I (
m
A)
1
10
100
1000
0
.1 .2 .3 .4 .5 .6 .7 .8 .9
1 1.1
FM
F
In
s
t
a
n
ta
n
e
o
u
s
F
o
r
w
a
r
d
C
u
r
r
e
n
t -
I (
A
)
Forward Voltage Drop - V (V)
T = 175C
T = 125C
T = 25C
J
J
J
1000
10000
0 10 20 30 40 50 60 70 80 90100110
T = 25C
J
Reverse Voltage - V (V)
R
T
J
u
n
c
ti
o
n
C
ap
ac
i
t
a
n
c
e
-
C
(
p
F
)
.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
1
th
J
C
t , Rectangular Pulse Duration (Seconds)
Th
e
r
m
a
l
Im
pe
da
nc
e -
Z
(
C
/
W
)
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
243NQ...(R) Series
Bulletin PD-2.262 rev. B 05/02
4
www.irf.com
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
120
130
140
150
160
170
180
0
50 100 150 200 250 300 350
DC
A
l
l
o
wa
b
l
e
Ca
s
e
T
e
m
p
e
r
a
t
u
re
- (
C
)
Average Forward Current - I (A)
F(AV)
243NQ
R (DC) = 0.20C/W
thJC
0
50
100
150
200
250
0
50 100 150 200 250 300 350
DC
A
v
e
r
ag
e P
o
w
e
r
L
o
s
s
-
(
W
a
tts
)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
Average Forward Current - I (A)
1000
10000
100000
10
100
1000
10000
FS
M
p
Non-Repetitive Surge Current -
I (A)
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
FRE E-W H EEL
D IO D E
40H FL40 S02
C UR RE N T
M O N ITO R
H IG H-SPE ED
SW ITC H
IRFP460
L
D UT
R g = 25 oh m
V d = 25 V olt
+
243NQ...(R) Series
Bulletin PD-2.262 rev. B 05/02
5
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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