SCHOTTKY RECTIFIER 160 Amp
161CMQ... SERIES
www.irf.com 1
PD-2.174 rev. B 12/97
Dimensions in millimeters and inches
Conforms to JEDEC Outline TO - 249AA
CASE STYLE AND DIMENSIONS
IF(AV) Rectangular 160 A
waveform
VRRM range 35 to 45 V
IFSM @ tp = 5 µs sine 11,500 A
VF@ 80 Apk, TJ
= 125°C 0.63 V
(per leg)
TJrange - 55 to 175 °C
Characteristics 161CMQ... Units
Major Ratings and Characteristics Description/Features
The 161CMQ isolated, center tap 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
Isolated heatsink
Center tap module
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
Low profile, high current package
161CMQ... Series
2
PD-2.174 rev. B 12/97
www.irf.com
TJMax. Junction Temperature Range -55 to 175 °C
Tstg Max. Storage Temperature Range -55 to 175 °C
RthJC Max. Thermal Resistance Junction 1.0 °C/W DC operation * See Fig. 4
to Case (Per Leg)
RthJC Max. Thermal Resistance Junction 0.50 °C/W DC operation
to Case (Per Package)
RthCS Typical Thermal Resistance, Case 0.10 °C/W Mounting surface , smooth and greased
to Heatsink
wt Approximate Weight 58 (2.0) g (oz.)
T Mounting Torque Min. 40 (35)
Max. 58 (50)
Case Style TO - 249AA JEDEC
Thermal-Mechanical Specifications
Kg-cm
(Ibf-in)
VFM Max. Forward Voltage Drop 0.71 V @ 80A
(Per Leg) * See Fig. 1 (1) 0.88 V @ 160A
0.63 V @ 80A
0.79 V @ 160A
IRM Max. Reverse Leakage Current 5 mA TJ = 25 °C
(Per Leg) * See Fig. 2 (1) 45 mA TJ = 125 °C
CTMax. Junction Capacitance (Per Leg) 2600 p F VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance (Per Leg) 8.0 nH Measured from terminal hole to terminal hole
dv/dt Max. Voltage Rate of Change 10,000 V/ µs
(Rated VR)
TJ = 25 °C
TJ = 125 °C
Electrical Specifications
(1) Pulse Width < 300µs, Duty Cycle <2%
VR = rated VR
Absolute Maximum Ratings
Following any rated
load condition and with
rated VRRM applied
Parameters 161CMQ Units Conditions
IF(AV) Max. Average Forward Current 160 A 50% duty cycle @ TC = 101 °C, rectangular wave form
* See Fig. 5
IFSM Max. Peak One Cycle Non-Repetitive 11,500 5µs Sine or 3µs Rect. pulse
Surge Current (Per Leg) * See Fig. 7 900 10ms Sine or 6ms Rect. pulse
EAS Non-Repetitive Avalanche Energy 108 mJ TJ
= 25 °C, IAS = 16 Amps, L = 0.84 mH
(Per Leg)
IAR Repetitive Avalanche Current 16 A Current decaying linearly to zero in 1 µsec
(Per Leg) Frequency limited by TJ max. VA = 1.5 x VR typical
A
Part number 161CMQ035 161CMQ040 161CMQ045
VRMax. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V)
Voltage Ratings
35 40 45
Parameters 161CMQ Units Conditions
Parameters 161CMQ Units Conditions
161CMQ... Series
3
PD-2.174 rev. B 12/97
www.irf.com
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
Fig. 4 - Max. Thermal Impedance ZthJC Characteristics (Per Leg)
.001
.01
.1
1
10
100
1000
0 5 10 15 20 25 30 35 40 4
5
R
R
T = 175°C
150°C
125°C
100°C
75°C
50°C
25°C
J
R everse V oltage - V (V )
R ev erse Cu rre nt - I (mA)
100
1000
10000
0102030405
0
T = 25°C
J
Reverse Voltag e - V (V)
R
T
Junction C apac itance - C (p F )
.001
.01
.1
1
10
.00001 .0001 .001 .01 .1 1 10 10
0
D = 0.33
D = 0.50
D = 0.25
D = 0.17
D = 0.08
1
thJC
t , Rectangular Pulse Duration (Seconds)
Thermal Im peda nce - Z (°C/W)
Sin g le Puls e
(Thermal R esistan ce)
2
t
1
t
P
DM
Notes:
1 . D uty fa cto r D = t / t
2 . P e ak T = P x Z + T
1
JDMthJCC
2
1
10
100
1000
0.2.4.6.811.21.41.
6
FM
F
Instantaneous Forward C urrent - I (A )
T = 175°C
T = 125° C
T = 25° C
J
J
J
Forw ard V oltage D rop - V (V )
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
161CMQ... Series
4
PD-2.174 rev. B 12/97
www.irf.com
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
0
10
20
30
40
50
60
70
80
02040608010012
0
DC
Average Power Loss - (W atts)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
A verag e Fo rwa rd Cu rr e nt - I (A)
80
100
120
140
160
180
0 2040608010012
0
DC
Allowable Case Temp e ratu re - ( °C)
Average Forw ard C u r ren t - I (A)
F(AV)
161CMQ
R (DC) = 1.0°C/W
thJC
100
1000
10000
10 100 1000 10000
FSM
p
N on-Repeti tive Surge Current - I ( A)
A t Any Rated Load C ondi ti on
A nd Wi th Rated V A ppl i ed
Follo wi ng Surge
RRM
Sq uare Wav e Pulse Duration - t (mi crosec )
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm Vd = 25 Volt
+
