SMAJ SERIES
400Watts Surface Mount Transient Voltage Suppressor
RATINGS AND CHARACTERISTIC CURVES (SMAJ SERIES)
FIG.1- PEAK PULSE POWER RATING CURVE
NON-REPETITIVE
PULSE WAVEFORM
SHOWN in FIG. 3
T
A
=25
0
C
FIG.2- PULSE DERATING CURVE
PEAK PULSE POWER (Pppm) or CURRENT (lpp)
DERATING IN PERCENTAGE, %
100
100
Pppm, PEAK PULSE POWER, KW
75
10
50
1
25
0.2" sq 5.0mm
2
COPPER PAD AREAS
0.1
10 s
0.1 s
1.0 s
100 s
1.0ms
10ms
0
0
25
50
75
100
125
O
150
175
200
td. PULSE WIDTH, sec.
TA, AMBIENT TEMPERATURE. C
FIG.3- CLAMPING POWER PULSE WAVEFORM
150
50
FIG.4- MAXIMUM NON-REPETITIVE PEAK FORWARD
SURGE CURRENT
PEAK FORWARD SURGE CURRENT. (A)
lppm, PEAK PULSE CURRENT %
PULSE WIDTH (td) is DEFINED
tr=10 sec. AS THE POINT WHERE THE PEAK
CURRENT DECAYS to 50% of lppm
100
40
8.3ms Single Half Sine Wave
JEDEC Method
TJ=TJ max.
PEAK VALUE
lppm
HALF VALUE- lpp
2
10/1000 sec. WAVEFORM
AS DEFINED BY R.E.A.
30
20
50
10
0
0
td
1.0
2.0
t, TIME, ms
3.0
4.0
0
1
10
NUMBER OF CYCLES AT 60Hz
100
FIG.5- TYPICAL JUNCTION CAPACITANCE
10000
Tj=25
0
C
f=1.0MHz
Vsig=50mVp-p
Cj, JUNCTION CAPACITANCE, pF
1000
MEASURED AT
ZERO BIAS
100
MEASURED AT
STAND-OFF
VOLTAGE,V
WM
10
1
10
V(BR), BREAKDOWN VOLTAGE. (V)
100
200
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