Silicon Avalanche Diodes
400W Surface Mount Transient Voltage Supressors
RoHS
SMAJ Series
Peak Pulse Power (PPP) or Current (IPP)
Derating in Percentage, %
®
Ratings and Characteristic Curves TA=25˚C unless otherwise noted
100
PPPM- Peak Pulse Power (KW)
Non-repetitive pulse
waveform shown in
Fig.3 T = 25˚C
A
100
75
10
50
1
25
0.2x0.2"(5.0x5.0mm)
Copper Pad Areas
0.1
0.1µs
0
0
25
50
75
100 125 150 175 200
TA- Ambient Temperature (˚C)
1.0µs
10µs
100µs
1.0ms
10ms
td- Pulse Width (sec.)
Fig. 1 Peak Pulse Power Rating
150
IPPM- Peak Pulse Current, % I RSM
tr=10µsec
Peak Value
IPPM
Half Value IPPM
2
TJ=25˚C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
Fig. 2 Pulse Derating Curve
20000
10000
CJ-Junction Capacitance (pF)
TJ=25˚C
f=1.0MHZ
Vsig=50mVp-p
Uni-Directional
100
VR, Measured at
Stand-Off
Voltage, VWM
1000
Bi-Directional
50
10/1000µsec. Waveform
as defined by R.E.A
100
td
0
0
1.0
2.0
3.0
4.0
10
1.0
Uni-Directional
Bi-Directional
10
100
200
VWM-Reverse Stand-Off Voltage (V)
Fig. 3 Pulse Waveform
100
IPSM-Peak Forward Surge Current (A)
Transient Thermal Impedance
(˚C/W)
Fig. 4- Typical Junction Capacitance
200
TJ=TJ MAX
8.3 Single Half Sine-Wave
(JEDEC Method)
Undirectional Only
100
10
1.0
0.1
0.001
0.01
0.1
1
10
100
1000
10
1
10
Number of Cycles at 60Hz
100
tp- Pulse Duration(sec)
Fig. 5- Typ. Transient Thermal Impedance
Fig. 6- Maximum Non-Repetitive Peak
Forward Surge Current
w w w. l i t t e l f u s e . c o m
256
LITTELFUSE [ LITTELFUSE ]
