1
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Major Ratings and Characteristics
I
F(AV)
Rectangular
120
A
waveform
V
RRM
15
V
I
FSM
@ tp = 5 s sine
10,800
A
V
F
@
120 Apk, T
J
= 75C
0.33
V
T
J
range
- 55 to 125
C
Characteristics
125NQ015(R) Units
The 125NQ015(R) high current Schottky rectifier module has
been optimized for ultra low forward voltage drop specifically for
the OR-ing of parallel power supplies. The proprietary barrier
technology allows for reliable operation up to 125 C junction
temperature. Typical applications are in parallel switching
power supplies, converters, reverse battery protection, and
redundant power subsystems.
125C T
J
operation (V
R
< 5V)
Unique high power, Half-Pak module
Optimized for OR-ing applications
Ultra low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Description/Features
SCHOTTKY RECTIFIER
120 Amp
125NQ015 (R)
Bulletin PD-2.275 rev. B 02/01
D-67
Outline D-67 HALF PAK Module
Dimensions in millimeters and (inches)
125NQ015
Lug Terminal Anode
Base Cathode
125NQ015R
Lug Terminal Cathode
Base Anode
125NQ015(R)
Bulletin PD-2.275 rev. B 02/01
2
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V
R
Max. DC Reverse Voltage (V)
15
V
RWM
Max. Working Peak Reverse Voltage (V)
25
Voltage Ratings
I
F(AV)
Max. Average Forward Current
120
A
50% duty cycle @ T
C
= 71 C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
10,800
5s Sine or 3s Rect. pulse
Surge Current * See Fig. 7
1700
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
9
mJ
T
J
= 25 C, I
AS
= 2 Amps, L = 4.5 mH
I
AR
Repetitive Avalanche Current
2
A
Current decaying linearly to zero in 1 sec
Frequency limited by T
J
max. V
A
= 3 x V
R
typical
Parameters
125NQ Units
Conditions
Absolute Maximum Ratings
A
V
FM
Max. Forward Voltage Drop (1)
0.39
V
@ 120A
* See Fig. 1
0.52
V
@ 240A
0.33
V
@ 120A
0.45
V
@ 240A
I
RM
Max. Reverse Leakage Current (1)
40
mA
T
J
= 25 C
* See Fig. 2
2000
mA
T
J
= 100 C
1780
mA
T
J
= 100 C
V
R
= 12V
1080
mA
T
J
= 100 C
V
R
= 5V
C
T
Max. Junction Capacitance
7700
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
= 75 C
V
R
= rated V
R
Parameters
125NQ Units
Conditions
Electrical Specifications
T
J
Max. Junction Temperature Range
-55 to 125
C
T
stg
Max. Storage Temperature Range
-55 to 150
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
125NQ Units
Conditions
Kg-cm
(Ibf-in)
(1) Pulse Width < 300s, Duty Cycle < 2%
Following any rated
load condition and
with rated V
RRM
applied
Part number
125NQ015(R)
125NQ015(R)
Bulletin PD-2.275 rev. B 02/01
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
FM
F
I
n
s
t
an
t
a
ne
ou
s
F
o
r
w
ar
d
C
u
r
r
e
nt
-
I
(
A
)
Forward Voltage Drop - V (V)
T = 100C
T = 75C
T = 25C
J
J
J
1
10
100
1000
10000
0
5
10
15
R
R
75C
50C
25C
Reverse Voltage - V (V)
R
ev
er
s
e
C
u
r
r
e
n
t
-
I (
m
A)
T = 100C
J
.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
1000
10000
0
5
10
15
20
25
30
T = 25C
J
Reverse Voltage - V (V)
R
T
J
u
n
c
ti
o
n
C
a
p
a
c
i
ta
n
c
e
-
C
(
p
F
)
125NQ015(R)
Bulletin PD-2.275 rev. B 02/01
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
0
10
20
30
40
50
60
0
25
50
75 100 125 150 175
DC
A
v
er
a
ge P
o
w
er
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)
75
80
85
90
95
100
105
0
25
50
75 100 125 150 175
DC
A
llo
w
ab
l
e
C
as
e T
e
m
p
e
ra
t
u
re
- (
C
)
Average Forward Current - I (A)
F(AV)
125NQ015
R (DC) = 0.40C/W
thJC
1000
10000
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 FL40S02
C UR RE N T
M O N ITO R
H IG H -SPE ED
SW IT C H
IRFP460
L
D UT
R g = 2 5 oh m
V d = 25 V olt
+
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