SCHOTTKY RECTIFIER 120 Amp
120NQ...(R) SERIES
PD-2.224 rev. C 09/98
1www.irf.com
Major Ratings and Characteristics Description/Features
IF(AV) Rectangular 120 A
waveform
VRRM range 35 to 45 V
IFSM @ tp = 5 µs sine 29,000 A
VF@ 120Apk, TJ=125°C 0.52 V
TJrange - 55 to 150 °C
Characteristics 120NQ...(R) Units The 120NQ...(R) high current Schottky rectifier module series
has been optimized for very low forward voltage drop, with
moderate leakage. The proprietary barrier technology allows for
reliable operation up to 150° C junction temperature. Typical
applications are in switching power supplies, converters, free-
wheeling diodes, and reverse battery protection.
150° 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
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
D-67
Outline D-67 HALF PAK Module
Dimensions in millimeters and (inches)
120NQ045
Lug Terminal Anode
Base Cathode
120NQ045R
Lug Terminal Cathode
Base Anode
120NQ...(R) Series
PD-2.224 rev. C 09/98
2www.irf.com
TJMax. Junction Temperature Range -55 to 150 °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. 17 (15) Non-lubricated threads
Max. 29 (25)
Terminal Torque Min. 23 (20)
Max. 46 (40)
Case Style HALF PAK Module
Thermal-Mechanical Specifications
Parameters 120NQ Units Conditions
Kg-cm
(Ibf-in)
VFM Max. Forward Voltage Drop (1) 0.57 V @ 120A
* See Fig. 1 0.73 V @ 240A
0.52 V @ 120A
0.69 V @ 240A
IRM Max. Reverse Leakage Current (1) 10 mA TJ = 25 °C
* See Fig. 2 5 00 m A TJ = 125 °C
VF(TO) Threshold Voltage 0.32 V TJ = TJ max.
rtForward Slope Resistance 1.37 mΩ
CTMax. Junction Capacitance 5200 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25 °C
LSTypical Series Inductance 7. 0 n H From top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change 10,000 V/ µ s
(Rated VR)
TJ = 25 °C
TJ = 125 °C
VR = rated VR
Parameters 120NQ Units Conditions
(1) Pulse Width < 300µs, Duty Cycle < 2%
Electrical Specifications
IF(AV) Max. Average Forward Current 120 A 50% duty cycle @ TC = 106° C, rectangular wave form
* See Fig. 5
IFSM Max. Peak One Cycle Non-Repetitive 29,000 5µs Sine or 3µs Rect. pulse
Surge Current * See Fig. 7 1550 10ms Sine or 6ms Rect. pulse
EAS Non-Repetitive Avalanche Energy 81 mJ TJ = 25 °C, IAS
= 12 Amps, L = 1.12 mH
IAR Repetitive Avalanche Current 12 A Current decaying linearly to zero in 1 µsec
Frequency limited by TJ max. VA = 1.5 x VR typical
Parameters 120NQ Units Conditions
Absolute Maximum Ratings
AFollowing any rated
load condition and
with rated VRRM applied
Part number 120NQ035(R) 120NQ040(R) 120NQ045(R)
VRMax. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V) 35 40 45
Voltage Ratings
120NQ...(R) Series
PD-2.224 rev. C 09/98
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 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Instantaneous Forward Curre nt - I ( A)
T = 15 0°C
T = 125°C
T = 25°C
J
J
J
F
FM
Forward V olt age Drop - V (V)
0.01
0.1
1
10
100
1000
10000
0 5 10 15 20 25 30 35 40 45
R
R
125°C
100°C
75°C
50°C
25°C
Reverse C urre nt - I (mA)
T = 150°C
J
Reverse V oltage - V (V)
1000
10000
0 1020304050
R
T
Jun ction Capacitance - C (pF)
Reverse Voltag e - V (V)
T = 25°C
J
0.001
0.01
0.1
1
0.00001 0.0001 0.001 0.01 0.1 1 10 100
thJC
t , Recta ngular Pulse Duration (Seconds)
Single Pulse
(T her m al Res i st an ce)
1
Thermal Impedance Z (°C/W)
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
J
DM
thJC C
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
2
t
1
t
P
DM
12
120NQ...(R) Series
PD-2.224 rev. C 09/98
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
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
1000
10000
100000
10 100 1000 10000
FSM
Non-Repetitiv e Surge Current - I (A)
p
Square Wave Pulse Duration - t (microsec)
At Any Rate d Load Condit ion
And With Rated V Applied
Foll ow ing Su r g e
RRM
80
90
100
110
120
130
140
150
160
0 20 40 60 80 100 120 140 160 180
DC
Allow able C ase Temperatur e - (°C)
F(AV)
Average F orward Current - I (A)
see note (2)
Squar e wave ( D = 0.50)
8 0% Rated V ap p lie d
R
0
10
20
30
40
50
60
70
80
90
100
0 20 40 60 80 100 120 140 160 180
DC
Av er ag e Pow e r Lo ss - (Watt s )
F(AV)
RMS Limit
D = 0 .20
D = 0 .25
D = 0 .33
D = 0 .50
D = 0 .75
Average Forward Current - I (A )
(2) Formula used: TC = T J - (Pd + PdREV) x RthJC ;
Pd = Forward Power Loss = IF(AV) x V FM @ (IF(AV) / D) (see Fig. 6);
PdREV = Inverse Power Loss = VR1 x I R (1 - D); IR @ VR1 = 80% rated VR
