Bulletin PD-2.249 rev. D 05/05
121NQ...(R) SERIES
SCHOTTKY RECTIFIER
120 Amp
IF(AV) = 120 A
VR = 35/ 50V
Major Ratings and Characteristics
Description/ Features
Characteristics
Values
Units
IF(AV) Rectangular
120
A
VRRM range
35 / 50
V
IFSM
@ tp = 5 µs sine
19,800
A
VF
@ 120Apk, TJ=125°C
0.56
V
TJ
range
- 55 to 175
°C
waveform
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 TJ 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
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
VR
121NQ035
121NQ040
121NQ045
121NQ050
35
40
45
50
Max. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V)
Absolute Maximum Ratings
Parameters
121NQ Units
IF(AV) Max. Average Forward Current
* See Fig. 5
IFSM
120
Max. Peak One Cycle Non-Repetitive
Surge Current * See Fig. 7
19,800
2200
A
A
EAS
Non-Repetitive Avalanche Energy
81
mJ
IAR
Repetitive Avalanche Current
12
A
Conditions
50% duty cycle @ TC = 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 VRRM applied
TJ = 25 °C, IAS = 12 Amps, L = 1.12 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by TJ max. VA = 1.5 x VR typical
Electrical Specifications
Parameters
VFM
121NQ Units
Max. Forward Voltage Drop
(1)
* See Fig. 1
IRM
Conditions
0.65
V
@ 120A
0.83
V
@ 240A
0.56
V
@ 120A
0.70
V
@ 240A
TJ = 25 °C
TJ = 125 °C
Max. Reverse Leakage Current (1)
10
mA
TJ = 25 °C
* See Fig. 2
90
mA
TJ = 125 °C
5200
pF
VR = 5VDC, (test signal range 100Khz to 1Mhz) 25 °C
7.0
nH
From top of terminal hole to mounting plane
10000
V/ µs
CT
Max. Junction Capacitance
LS
Typical Series Inductance
dv/dt Max. Voltage Rate of Change
(Rated VR)
VR = rated VR
(1) Pulse Width < 300µs, Duty Cycle < 2%
Thermal-Mechanical Specifications
Parameters
121NQ Units
Conditions
TJ
Max. Junction Temperature Range
-55 to 175
Tstg
Max. Storage Temperature Range
-55 to 175
°C
RthJC Max. Thermal Resistance Junction
to Case
0.40
°C/W
DC operation
RthCS Typical Thermal Resistance, Case to
0.15
°C/W
Mounting surface , smooth and greased
°C
* See Fig. 4
Heatsink
wt
Approximate Weight
T
Mounting Torque
Terminal Torque
Case Style
2
25.6 (0.9) g (oz.)
Min.
40 (35)
Max.
58 (50)
Min.
Max.
58 (50)
86 (75)
Non-lubricated threads
Kg-cm
(Ibf-in)
HALF PAK Module
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121NQ...(R) Series
Bulletin PD-2.249 rev. D 05/05
1000
1000
ReverseCurrent - I (mA)
R
100
100
150°C
125°C
10
100°C
1
75°C
50°C
.1
25°C
.01
.001
0
5
10 15 20 25 30 35 40 45
ReverseVoltage- VR (V)
T =175°C
J
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
T =125°C
J
10000
T = 25°C
J
JunctionCapacitance- C (pF)
T
InstantaneousForwardCurrent - I (A)
F
T =175°C
J
10
1
0
.1 .2 .3 .4 .5 .6 .7 .8 .9
T =25°C
J
1000
0
1 1.1 1.2
10
20
30
40
50
ReverseVoltage- V (V)
R
ForwardVoltageDrop- V (V)
FM
Fig. 1 - Maximum Forward Voltage Drop Characteristics
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Thermal Impedance- ZthJC (°C/W
)
1
.1
D=0.50
D=0.33
D=0.25
P
DM
D=0.17
t
1
t
2
D=0.08
Notes:
1. Dutyfactor D= t1/ t2
.01
SinglePulse
(Thermal Resistance)
.001
.00001
.0001
.001
2. PeakT =P xZ
+T
J DM thJC C
.01
.1
1
10
100
t1, Rectangular PulseDuration(Seconds)
Fig. 4 - Maximum Thermal Impedance Z thJC Characteristics
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121NQ...(R) Series
Bulletin PD-2.249 rev. D 05/05
100
121NQ
RthJC (DC) =0.40°C/W
170
AveragePower Loss- (W
atts)
AllowableCaseTemperature-(°C)
180
160
150
DC
140
130
120
0
40
80
120
160
D=0.08
D=0.17
80 D=0.25
D=0.33
D=0.50
60
RMSLimit
DC
40
20
0
0
200
AverageForwardCurrent - IF(AV) (A)
20 40 60 80 100 120 140 160 180
AverageForwardCurrent - I
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
F(AV)
(A)
Fig. 6 - Forward Power Loss Characteristics
(A)
100000
Non-Repetitive Surge Current - I
FSM
At Any Rated Load Condition
And With Rated VRRM Applied
Following Surge
10000
1000
10
100
1000
10000
Square Wave Pulse Duration - t p (microsec)
Fig. 7 - Maximum Non-Repetitive Surge Current
L
DUT
IRFP460
Rg = 25 ohm
CURRENT
MONITOR
HIGH-SPEED
SWITCH
FREE-WHEEL
DIODE
+
Vd = 25 Volt
40HFL40S02
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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