Bulletin PD-2.249 rev. D 05/05
121NQ...(R) SERIES
SCHOTTKY RECTIFIER
120 Amp
I
F(AV)
= 120 A
V
R
= 35/ 50V
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
range
I
FSM
V
F
T
J
@ tp = 5 µs sine
@ 120Apk, T
J
=125°C
range
Description/ Features
Units
A
V
A
V
°C
The 121NQ... (R) high current Schottky rectifier module
series has been optimized for low reverse leakage at high
temperature. 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 two 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
Values
120
35 / 50
19,800
0.56
- 55 to 175
Case Styles
121NQ...(R)
D-67
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1
121NQ...(R) Series
Bulletin PD-2.249 rev. D 05/05
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
121NQ035
35
121NQ040
40
121NQ045
45
121NQ050
50
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
121NQ Units
120
19,800
2200
81
12
A
Conditions
50% duty cycle @ T
C
= 133° 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
= 12 Amps, L = 1.12 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)
121NQ Units
0.65
0.83
0.56
0.70
V
V
V
V
mA
mA
pF
nH
V/ µs
@ 120A
@ 240A
@ 120A
@ 240A
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
10
90
5200
7.0
10000
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
(Rated V
R
)
(1) Pulse Width < 300µs, Duty Cycle < 2%
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
121NQ Units
-55 to 175
-55 to 175
0.40
0.15
°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)
Kg-cm
(Ibf-in)
Non-lubricated threads
HALF PAK Module
2
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121NQ...(R) Series
Bulletin PD-2.249 rev. D 05/05
10
00
10
00
T =1 5 C
7°
J
R v rs C rre t - I (m )
ee e u n
A
R
10
0
1
0
1
.1
.0
1
.0 1
0
0
1 0C
5°
1 5C
2°
1 0C
0°
7°
5C
5°
0C
2°
5C
In ta ta e u F rw rdC rre t - I (A
s n nos o a
u n
)
F
10
0
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
T =1 5 C
2°
J
T= 2°
5C
J
1
0
J n tio C p c n e- C (p )
u c n a a ita c
F
T
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
100
00
T =2 °
5C
J
1
0
.1 .2 .3 .4 .5 .6 .7 .8 .9
F rw rdV lta eD p- V (V
o a
o g ro
)
F
M
1 1 1
.1 .2
10
00
0
1
0
2
0
3
0
4
0
5
0
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
.1
D=0 0
.5
D=0 3
.3
D=0 5
.2
D=0 7
.1
D=0 8
.0
P
D
M
t
1
t
2
N te :
o s
1 D tyfa to D= t1/ t2
. u
c r
.0
1
S g P ls
in le u e
(T e a R s ta c )
h rm l e is n e
.0 1
0
.0 0 1
00
.0 0
01
.0 1
0
.0
1
.1
2 P a T =P xZ
. ek
+T
J D
M th C C
J
1
1
0
10
0
t1, R c n u r P ls D ra n(S c n s
e ta g la u e u tio
eod)
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
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3
121NQ...(R) Series
Bulletin PD-2.249 rev. D 05/05
10
8
A w b C s T m e tu -(° )
llo a le a e e p ra re C
10
7
10
6
10
5
D
C
10
4
10
3
10
2
0
11 Q
2N
R J (D ) =0 0 C
.4 ° /W
th C C
10
0
D=0 8
.0
D=0 7
.1
D=0 5
.2
8
0
D=0 3
.3
D=0 0
.5
6
0
R SL it
M im
4
0
D
C
A e g P w r L s - (W tts
v ra e o e o s
a )
2
0
4
0
8
0
10
2
10
6
20
0
0
0
2 4 6 8 1 01 01 01 01 0
0 0 0 0 0 2 4 6 8
A e g F rw rdC rre t - I
v ra e o a
u n
F V
(A )
(A
)
A e g F rw rdC rre t - IF V (A
v ra e o a
u n
(A ) )
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
100000
(A)
Fig. 6 - Forward Power Loss Characteristics
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following Surge
Non-Repetitive Surge Current - I
FSM
10000
1000
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Maximum Non-Repetitive Surge Current
L
HIGH-S
PEED
S CH
WIT
F
REE-WHEEL
DIODE
40HF 40S
L 02
+
DUT
IR P460
F
Rg = 25 ohm
Vd = 25 Volt
CURRENT
MONIT
OR
Fig. 8 - Unclamped Inductive Test Circuit
4
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121NQ...(R) Series
Bulletin PD-2.249 rev. D 05/05
Outline Table
Outline D-67 HALF PAK Module
Dimensions in millimeters and (inches)
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. 05/05
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