81CNQ... Series
PD-2.237 rev. B 01/99
Voltage Ratings
Part number
VR Max. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V)
81CNQ035
35
81CNQ040
40
81CNQ045
45
Absolute Maximum Ratings
Parameters
IF(AV) Max.AverageForwardCurrent
* See Fig. 5
IFSM Max.PeakOneCycleNon-Repetitive
SurgeCurrent (Per Leg) *SeeFig.7
EAS Non-RepetitiveAvalancheEnergy
(Per Leg)
IAR RepetitiveAvalancheCurrent
(Per Leg)
81CNQ Units
Conditions
80 A 50%dutycycle@TC=141°C,rectangularwaveform
4600
790
54
5µs Sine or 3µs Rect. pulse Following any rated
A load condition and with
10ms Sine or 6ms Rect. pulse rated VRRMapplied
mJ TJ = 25 °C, IAS = 8 Amps, L = 1.7 mH
8 A Currentdecayinglinearlytozeroin1µsec
Frequency limited by TJ max. VA = 1.5 x VR typical
Electrical Specifications
Parameters
81CNQ Units
Conditions
VFM Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
IRM Max. Reverse Leakage Current
(Per Leg) * See Fig. 2 (1)
CT Max. Junction Capacitance (Per Leg)
LS Typical Series Inductance (Per Leg)
dv/dt Max. Voltage Rate of Change
(Rated VR)
0.60
0.74
0.54
0.66
5
45
2600
5.5
10,000
Thermal-Mechanical Specifications
V @ 40A
V @ 80A
V @ 40A
V @ 80A
TJ = 25 °C
TJ = 125 °C
mA TJ = 25 °C
mA TJ = 125 °C
VR = rated VR
pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C
nH Measured lead to lead 5mm from package body
V/ µs
(1) Pulse Width < 300µs, Duty Cycle <2%
Parameters
TJ Max.JunctionTemperatureRange
Tstg Max.StorageTemperatureRange
RthJC Max.ThermalResistanceJunction
toCase (Per Leg)
RthJC Max.ThermalResistanceJunction
toCase(Per Package)
RthCS TypicalThermalResistance,Case
to Heatsink (D61-8 Only)
wt ApproximateWeight
T MountingTorque
Min.
(D61-8 Only)
Max.
81CNQ Units
Conditions
-55to175 °C
-55to175 °C
0.85 °C/W DCoperation
* See Fig. 4
0.42 °C/W DCoperation
0.30 °C/W Mountingsurface,smoothandgreased
7.8(0.28) g(oz.)
40(35) Kg-cm
58(50) (Ibf-in)
2 www.irf.com
