Major Ratings and Characteristics
IF(AV) Rectangular 160 A
waveform
VRRM range 35 to 45 V
IFSM @ tp = 5 µs sine 11500 A
VF@
80 Apk, TJ
= 125°C 0.63 V
(per leg)
T
Jrange - 55 to 175 °C
Characteristics 161CNQ... Units
The 161CNQ non isolated, center tap 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 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
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Low profile, high current package
Description/Features
Outline TO-249AA
Dimensions in millimeters and (inches)
TO-249AA
SCHOTTKY RECTIFIER 160 Amp
161CNQ... SERIES
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(NON ISOLATED BASE)
161CNQ... Series
2
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VRMax. DC Reverse Voltage (V) 35 40 45
VRWM Max. Working Peak Reverse Voltage (V)
TJMax. Junction Temperature Range - 55 to 175 °C
Tstg Max. Storage Temperature Range - 55 to 1 75 °C
RthJC Max. Thermal Resistance Junction 0.70 °C/W DC operation * See Fig. 4
to Case (Per Leg)
RthJC Max. Thermal Resistance Junction 0.35 °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)
Absolute Maximum Ratings
Following any rated
load condition and with
rated VRRM
applied
Parameters 161CNQ Units Conditions
IF(AV) Max. Average Forward (Per Leg) 80 A 50% duty cycle @ TC = 129 °C, rectangular wave form
Current * See Fig. 5 (Per Device) 160
IFSM Max. Peak One Cycle Non-Repetitive 11,500 A 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
Voltage Ratings
Parameters 161CNQ Units Conditions
Part number 161CNQ035 161CNQ040 161CNQ045
VFM Max. Forward Voltage Drop 0.71 V @ 80A TJ = 25 °C
(Per Leg) * See Fig. 1 (1) 0.88 V @ 160A
0.63 V @ 80A TJ = 125 °C
0.79 V @ 160A
IRM Max. Reverse Leakage Current 5 mA TJ = 25 °C VR = rated VR
(Per Leg) * See Fig. 2 (1) 45 mA TJ = 125 °C
CTMax. Junction Capacitance (Per Leg) 2600 pF 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)
Electrical Specifications
(1) Pulse Width < 300µs, Duty Cycle <2%
Parameters 161CNQ Units Conditions
161CNQ... Series
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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)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
Instantaneous Forward Current - I
F (A)
Forward Voltage Drop - VFM (V)
Reverse Voltage - VR (V)
Reverse Current - I
R
(mA)Junction Capacitance - C
T (p F)
Reverse Voltage - VR (V)
t1 , Rectangular Pulse Duration (Seconds)
Thermal Impedance Z thJC
(°C/W)
1
10
100
1000
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
T = 175˚C
T = 125˚C
T = 25˚C
J
J
J
0.001
0.01
0.1
1
10
100
1000
0 1020304050
100˚C
75˚C
50˚C
25˚C
T = 175˚C
J
125˚C
150˚C
100
1000
10000
0 1020304050
T = 25˚C
J
0.001
0.01
0.1
1
0.00001 0.0001 0.001 0.01 0.1 1 10 10
0
Single Pulse
(Thermal Resistance)
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
Notes:
1. Duty factor D = t1/ t2
2. Peak Tj = Pdm x ZthJC + Tc
2
t
1
t
P
DM
161CNQ... Series
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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)
FR EE-W HEEL
D IO D E
40HFL40S02
C URRENT
MONITOR
HIGH-SPEED
SW ITC H
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
(2) Formula used: TC = TJ - (Pd + PdREV) x RthJC
;
Pd = Forward Power Loss = IF(AV) x VFM @ (IF(AV) / D) (see Fig. 6);
PdREV = Inverse Power Loss = VR1 x IR (1 - D); IR @ VR1
= 80% rated VR
Average Forward Current - IF(AV) (A)
Allowable Case Temperature (°C)
Average Forward Current - IF(AV) (A)
Average Power Loss (Watts)
Square Wave Pulse Duration - tp (microsec)
Non-Repetitive Surge Current - I
FSM (A)
0
10
20
30
40
50
60
70
80
0 20 40 60 80 100 120
DC
RMS Limit
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
100
1000
10000
10 100 1000 10000
At Any Rated Load Condition
And With Rated Vrrm Applied
Following Surge
100
120
140
160
180
0 20 40 60 80 100 120
DC
see note (2)
Square wave (D = 0.50)
80% Rated Vr applied
161CNQ... Series
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