Bulletin PD-2.293 rev. B 05/02
181NQ...(R) SERIES
SCHOTTKY RECTIFIER
180 Amp
D-67
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
range
I
FSM
@ tp = 5 µs sine
V
F
T
J
@ 180Apk, T
J
=125°C
range
Description/ Features
Units
A
V
A
V
°C
The 181NQ high current Schottky rectifier module series has
been optimized for very low forward voltage drop, with moder-
ate leakage. The proprietary barrier technology allows for
reliable operation 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 three 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
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
181NQ...
180
30 to 45
22,000
0.56
- 55 to 175
181NQ045
Lug Terminal Anode
Base Cathode
181NQ045R
Lug Terminal Cathode
Base Anode
Outline D-67 HALF PAK Module
Dimensions in millimeters and (inches)
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1
181NQ...(R) Series
Bulletin PD-2.293 rev. B 05/02
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
181NQ030
30
181NQ035
35
181NQ040
40
181NQ045
45
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
* See Fig. 5
I
FSM
E
AS
I
AR
Max. Peak One Cycle Non-Repetitive
Surge Current * See Fig. 7
Non-Repetitive Avalanche Energy
Repetitive Avalanche Current
181NQ Units
180
22,000
2500
243
36
A
Conditions
50% duty cycle @ T
C
= 125° C, rectangular wave form
5µs Sine or 3µs Rect. pulse
10ms Sine or 6ms Rect. pulse
Following any rated
load condition and
with rated V
RRM
applied
A
mJ
A
T
J
= 25 °C, I
AS
= 36 Amps, L = 0.38 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
* See Fig. 1
(1)
181NQ Units
0.66
0.80
0.56
0.69
V
V
V
V
mA
mA
pF
nH
V/ µs
@ 180A
@ 360A
@ 180A
@ 360A
T
J
= 25 °C
T
J
= 125 °C
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
C
T
L
S
Max. Reverse Leakage Current (1)
* See Fig. 2
Max. Junction Capacitance
Typical Series Inductance
15
135
7800
6.0
10000
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 °C
From the top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change
(Rated V
R
)
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
(1) Pulse Width < 300µs, Duty Cycle < 2%
181NQ Units
-55 to 175
-55 to 175
0.30
0.10
°C
°C
°C/W
°C/W
DC operation
Conditions
R
thJC
Max. Thermal Resistance Junction
to Case
R
thCS
Typical Thermal Resistance, Case to
Heatsink
wt
T
Approximate Weight
Mounting Torque
Terminal Torque
Case Style
Min.
Max.
Min.
Max.
* See Fig. 4
Mounting surface , smooth and greased
25.6 (0.9) g (oz.)
40 (35)
58 (50)
58 (50)
86 (75)
HALF PAK Module
Non-lubricated threads
Kg-cm
(Ibf-in)
2
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181NQ...(R) Series
Bulletin PD-2.293 rev. B 05/02
10
00
10
00
10
0
R v rs C rre t - I (m )
ee e u n
A
R
1
0
1 5C
2°
1
.1
.0
1
.0 1
0
0
T =1 5 C
7°
J
T =1 5 C
2°
J
T= 2°
5C
J
1
0
1 0C
0°
7°
5C
5°
0C
2°
5C
5
1 1 2 2 3 3 4 4
0 5 0 5 0 5 0 5
R v rs V lta e- V (V
ee e o g
R )
T =1 5 C
7°
J
1 0C
5°
In ta ta e u F rw rdC rre t - I (A
s n nos o a
u n
)
F
10
0
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
100
00
Ju c nC p c n e- C (p )
n tio a a ita c
F
T
T =2 °
5C
J
1
0
.2
.4
.6
.8
1
10
00
0
1
0
2
0
3
0
4
0
5
0
F rw rdV lta eD p- V (V
o a
o g ro
)
F
M
R v rs V lta e- V (V
ee e o g
R )
Fig. 1 - Maximum Forward Voltage Drop Characteristics
1
T e a Im e a c - Zth C (° /W
h rm l p d n e
C )
J
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
D=0 0
.5
.1
D=0 3
.3
D=0 5
.2
D=0 7
.1
D=0 8
.0
.0
1
P
M
D
t
1
t2
N te :
o s
1 D tyfa to D= t1/ t 2
. u
c r
S g P ls
in le u e
(T e a R s ta c )
h rm l e is n e
2 P a T =P xZ
. ek
+T
J D
M th C C
J
.0
1
.1
1
1
0
10
0
.0 1
0
.0 0 1
00
.0 0
01
.0 1
0
t , R c n u r P ls D ra n(S c n s
e ta g la u e u tio
eod)
1
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
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3
181NQ...(R) Series
Bulletin PD-2.293 rev. B 05/02
10
8
A w b C s T m e tu - (° )
llo a le a e e p ra re C
11 Q
8N
R J (D ) =0 0 C
.3 ° /W
th C C
10
5
D=0 8
.0
D=0 7
.1
15
2
D=0 5
.2
D=0 3
.3
.5
1 0 D=0 0
0
7
5
5
0
2
5
0
0
D
C
10
7
10
6
A e g P w r L s - (W tts
v ra e o e o s
a )
R SL it
M im
10
5
D
C
10
4
10
3
0
4
0
8
0
10 10 20 20 20
2
6
0
4
8
4
0
8
0
10 10 20 20 20
2
6
0
4
8
A e g F rw rdC rre t - IF V (A
v ra e o a
u n
(A ) )
A e g F rw rdC rre t - I
v ra e o a
u n
(A
)
F V
(A )
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
100000
Fig. 6 - Forward Power Loss Characteristics
Non-Repetitive Surge Current - I
FSM
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following Surge
(A)
10000
1000
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Maximum Non-Repetitive Surge Current
L
H IG H-SPE ED
SW ITC H
FRE E-W H EEL
D IO D E
40H FL40 S02
V d = 25 V olt
D UT
IRFP460
R g = 25 oh m
+
C URRE NT
M O N ITO R
Fig. 8 - Unclamped Inductive Test Circuit
4
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181NQ...(R) Series
Bulletin PD-2.293 rev. B 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.
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
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