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Major Ratings and Characteristics
IF(AV) Rectangular 120 A
waveform
VRRM 15 V
IFSM @ tp = 5 µs sine 10,800 A
VF@
120 Apk, TJ= 75°C 0.33 V
TJ 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.
125°C TJ operation (VR < 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
2www.irf.com
VRMax. DC Reverse Voltage (V) 15
VRWM Max. Working Peak Reverse Voltage (V) 25
Voltage Ratings
IF(AV) Max. Average Forward Current 120 A 50% duty cycle @ TC = 71° C, rectangular wave form
* See Fig. 5
IFSM Max. Peak One Cycle Non-Repetitive 10,800 5µs Sine or 3µs Rect. pulse
Surge Current * See Fig. 7 1700 10ms Sine or 6ms Rect. pulse
EAS Non-Repetitive Avalanche Energy 9 mJ TJ
= 25 °C, IAS = 2 Amps, L = 4.5 mH
IAR Repetitive Avalanche Current 2 A Current decaying linearly to zero in 1 µsec
Frequency limited by TJ max. VA = 3 x VR typical
Parameters 125NQ Units Conditions
Absolute Maximum Ratings
A
VFM Max. Forward Voltage Drop (1) 0.39 V @ 120A
* See Fig. 1 0.52 V @ 240A
0.33 V @ 120A
0.45 V @ 240A
IRM Max. Reverse Leakage Current (1) 40 mA TJ = 25 °C
* See Fig. 2 2000 mA TJ = 100 °C
1780 mA TJ = 100 °C VR = 12V
1080 mA TJ = 100 °C VR = 5V
CTMax. Junction Capacitance 7700 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25 °C
LSTypical Series Inductance 7.0 nH From top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change 10,000 V/ µs
(Rated VR)
TJ = 25 °C
TJ = 75 °C
VR = rated VR
Parameters 125NQ Units Conditions
Electrical Specifications
TJMax. Junction Temperature Range -55 to 125 °C
Tstg Max. Storage Temperature Range -55 to 150 °C
RthJC Max. Thermal Resistance Junction 0.40 °C/W DC operation * See Fig. 4
to Case
RthCS 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 < 300µs, Duty Cycle < 2%
Following any rated
load condition and
with rated VRRM
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 ZthJC Characteristics
Fig. 1 - Maximum Forward Voltage Drop Characteristics
1
10
100
1000
0.1.2.3.4.5.6.7.
8
FM
F
Instantaneous Forward Current - I (A)
Forward Voltage Drop - V (V)
T = 100°C
T = 75°C
T = 25°C
J
J
J
1
10
100
1000
10000
05101
5
R
R
75°C
50°C
25°C
Reverse Voltage - V (V)
Reverse Current - I (mA)
T = 100°C
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
thJC
t , Rectangular Pulse Duration (Seconds)
Thermal Impedance - 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
JDMthJC C
2
1000
10000
0 5 10 15 20 25 30
T = 25°C
J
Reverse Voltage - V (V)
R
T
Junction Capacitance - C (pF)
125NQ015(R)
Bulletin PD-2.275 rev. B 02/01
4www.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 25507510012515017
5
DC
Average Power Loss - (Watts)
F(AV)
D = 0. 08
D = 0. 17
D = 0. 25
D = 0. 33
D = 0. 50
RMS Li mit
Average Forward Current - I (A)
75
80
85
90
95
100
105
0 25 50 75 100 125 150 17
5
DC
Allowable Case Temperature - (°C)
Average Forward Current - I (A)
F( AV)
125NQ015
R (DC) = 0. 40°C/ W
thJC
1000
10000
10 100 1000 10000
FSM
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)
FREE-WHEEL
DIOD E
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SW ITCH
IRFP460
L
DUT
Rg = 25 ohm Vd = 25 Volt
+
