SCHOTTKY RECTIFIER
120 Amp
124NQ...(R) SERIES
Bulletin PD-2.290 rev. B 03/01
1
www.irf.com
Major Ratings and Characteristics
I
F(AV)
Rectangular
120
A
waveform
V
RRM
range
35 to 45
V
I
FSM
@ tp = 5 s sine
27,000
A
V
F
@
120Apk, T
J
=100C
0.52
V
T
J
range
- 55 to 125
C
Characteristics
124NQ...(R) Units
The 124NQ... (R) high current Schottky rectifier modules have
been optimized for extremely low forward voltage drop, with
higher leakage. The proprietary barrier technology allows for
reliable operation up to 125 C junction temperature. Typical
applications are in switching power supplies, converters, free-
wheeling diodes, welding, and reverse battery protection.
125 C T
J
operation
Unique high power Half Pak module
High purity, high temperature epoxy encapsulation for en
hanced mechanical strength and moisture resistance
Extremely low forward voltage drop
High frequency operation
Guard ring enhanced ruggedness and long term reliability
Description/Features
D-67
Outline D-67 HALF PAK Module
Dimensions in millimeters and (inches)
124NQ045
Lug Terminal Anode
Base Cathode
124NQ045R
Lug Terminal
Cathode
Base Anode
124NQ... Series
Bulletin PD-2.290 rev. B 03/01
2
www.irf.com
T
J
Max. Junction Temperature Range
-55 to 125
C
T
stg
Max. Storage Temperature Range
-55 to 125
C
R
thJC
Max. Thermal Resistance Junction
0.40
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
124NQ Units
Conditions
Kg-cm
(Ibf-in)
V
FM
Max. Forward Voltage Drop (1)
0.54
V
@ 120A
* See Fig. 1
0.71
V
@ 240A
0.52
V
@ 120A
0.71
V
@ 240A
I
RM
Max. Reverse Leakage Current (1)
10
mA
T
J
= 25 C
* See Fig. 2
1200
mA
T
J
= 125 C
C
T
Max. Junction Capacitance
5200
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 C
L
S
Typical Series Inductance
7.0
nH
From top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change
10,000
V/ s
(Rated V
R
)
T
J
= 25 C
T
J
= 100 C
V
R
= rated V
R
Parameters
124NQ Units
Conditions
(1) Pulse Width < 300s, Duty Cycle < 2%
Electrical Specifications
I
F(AV)
Max. Average Forward Current
120
A
50% duty cycle @ T
C
= 76 C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive 27,000
5s Sine or 3s Rect. pulse
Surge Current * See Fig. 7
2400
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
135
mJ
T
J
= 25 C, I
AS
= 20 Amps, L = 0.67 mH
I
AR
Repetitive Avalanche Current
20
A
Current decaying linearly to zero in 1 sec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Parameters
124NQ Units
Conditions
Absolute Maximum Ratings
A
Following any rated
load condition and
with rated V
RRM
applied
Part number
124NQ035
124NQ040
124NQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
35
40
45
Voltage Ratings
124NQ... Series
Bulletin PD-2.290 rev. B 03/01
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
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
rre
n
t
- I
(A
)
Forward Voltage Drop - V (V)
T = 125C
T = 100C
T = 25C
J
J
J
.01
.1
1
10
100
1000
0
5 10 15 20 25 30 35 40 45
R
R
100C
75C
50C
25C
Reverse Voltage - V (V)
Re
v
e
r
s
e
C
u
r
r
e
n
t
-
I (
m
A)
T = 125C
J
1000
10000
0
10
20
30
40
50
T = 25C
J
Reverse Voltage - V (V)
R
T
J
unc
t
i
o
n
C
a
paci
t
an
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
p
e
d
a
n
c
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
124NQ... Series
Bulletin PD-2.290 rev. B 03/01
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
80
90
100
110
120
130
0
25
50
75 100 125 150 175
DC
Al
l
o
w
a
b
l
e
C
as
e
T
e
m
per
a
t
ur
e
-
(
C
)
Average Forward Current - I (A)
F(AV)
124NQ
R (DC) = 0.40C/W
thJC
0
20
40
60
80
100
0
25
50
75 100 125 150 175
DC
A
v
er
ag
e P
o
w
e
r
Lo
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
+
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