Major Ratings and Characteristics
IF(AV) Rectangular 240 A
waveform
VRRM range 80 to 100 V
IFSM @ tp = 5 µs sine 25,500 A
VF@
240Apk, TJ=125°C 0.72 V
TJrange - 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 TJ 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
2www.irf.com
TJMax. Junction Temperature Range -55 to 175 °C
Tstg Max. Storage Temperature Range -55 to 175 °C
RthJC Max. Thermal Resistance Junction 0.20 °C/W DC operation * See Fig. 4
to Case
RthCS 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)
VFM Max. Forward Voltage Drop (1) 0.86 V @ 240A
* See Fig. 1 1.01 V @ 480A
0.72 V @ 240A
0.86 V @ 480A
IRM Max. Reverse Leakage Current (1) 6 mA TJ = 25 °C
* See Fig. 2 80 mA TJ = 125 °C
CTMax. Junction Capacitance 5500 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25 °C
LSTypical Series Inductance 5.0 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 243NQ Units Conditions
(1) Pulse Width < 300µs, Duty Cycle < 2%
Electrical Specifications
IF(AV) Max. Average Forward Current 240 A 50% duty cycle @ TC = 120° C, rectangular wave form
* See Fig. 5
IFSM Max. Peak One Cycle Non-Repetitive 25,500 5µs Sine or 3µs Rect. pulse
Surge Current * See Fig. 7 3300 10ms Sine or 6ms Rect. pulse
EAS Non-Repetitive Avalanche Energy 15 m J TJ
= 25 °C, IAS
= 1 Amps, L = 30 mH
IAR Repetitive Avalanche Current 1 A Current decaying linearly to zero in 1 µsec
Frequency limited by TJ max. VA = 1.5 x VR typical
Parameters 243NQ Units Conditions
Absolute Maximum Ratings
A
Following any rated
load condition and
with rated VRRM applied
Part number 243NQ080 243NQ090 243NQ100
VRMax. DC Reverse Voltage (V)
VRWM 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 ZthJC Characteristics
Fig. 1 - Maximum Forward Voltage Drop Characteristics
.001
.01
.1
1
10
100
1000
0 20406080100
R
R
T = 175°C
150°C
125°C
100°C
75°C
50°C
25°C
J
Reverse Voltage - V (V)
Reverse Current - I (mA)
1
10
100
1000
0.1.2.3.4.5.6.7.8.911.1
FM
F
Instantaneous Forward Current - I (A)
Forward Voltage Drop - V (V)
T = 175°C
T = 125°C
T = 25°C
J
J
J
1000
10000
0 102030405060708090100110
T = 25°C
J
Reverse Voltage - V (V)
R
T
Junction Capacitance - C (pF)
.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
thJC
t , Rectangular Pulse Duration (Seconds)
Thermal Impedance - Z (°C/W)
Single Pulse
(Thermal Resistance)
2
t
1
t
P
DM
Not es :
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
JDMthJC C
2
243NQ...(R) Series
Bulletin PD-2.262 rev. B 05/02
4www.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
Al l owabl e Cas e Temperature - (°C)
Average Forward Current - I (A)
F( AV)
243NQ
R (DC) = 0.20°C/W
thJC
0
50
100
150
200
250
0 50 100 150 200 250 300 350
DC
Average Power Loss - (Watts)
F(AV)
D = 0. 08
D = 0. 17
D = 0. 25
D = 0. 33
D = 0. 50
RMS Li mit
Average Forward Current - I (A)
1000
10000
100000
10 100 1000 10000
FSM
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)
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm Vd = 25 Volt
+
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.
