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SMAJ7.0A Datasheet(PDF) 3 Page - Weitron Technology

Part No. SMAJ7.0A
Description  400W Surface Mount Transient Voltage Suppressors
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Maker  WEITRON [Weitron Technology]
Homepage  http://www.weitron.com.tw
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WEITRON
http://www.weitron.com.tw
SMAJ5.0A/CA thru
0
25
50
75
100
0
75
25
50
100
125
150
175
200
T A — Ambient Temperature ( oC )
1
5
10
50
100
tp — P ulse Duration (sec)
FIG. 2 –Pulse Derating Curve
FIG.1 – Peak Pulse Power Rating Curve
0.1
1
10
100
0.1ms
1.0ms
10ms
td — P ulse Width (sec.)
100ms
1.0ms
10ms
0.2 x 0.2" (5.0 x 5.0mm)
C opper P ad Areas
0.2 x 0.2" (5.0 x 5.0mm)
C opper P ad Areas
FIG.5 – Typical Transient Thermal
Impedance
Non-repetitive P ulse
Waveform shown in F IG . 3
T A = 25 oC
FIG.6 - Maximum Non-Repetitive Forward
Surge Current Uni-Directional Only
Number of C ycles at 60 Hz
10
100
1,000
10,000
10
1
100
200
VWM — R everse S tand-off Voltage (V)
T J = 25 oC
f = 1.0MHz
V sig = 50mV p-p
Measured at
S tand-Off
Voltage, V WM
Uni-Directional
B i-Directional
10
50
100
200
T J = TJ max.
8.3ms S ingle Half S ine-Wave
(J E DE C Method)
FIG. 4 – Typical Junction Capacitance
1
10
100
1000
0.001
0.01
0.1
1
10
100
1000
0
50
100
150
FIG. 3 – Pulse Wavef orm
T J = 25 oC
P ulse Width (td)
is defined as the point
where the peak current
decays to 50% of IPPM
tr = 10 sec.
P eak Value
IPPM
Half Value — IP P
IPPM
2
td
10/1000 sec. Waveform
as defined by R .E .A.
0
1.0
2.0
3.0
4.0
t — Time (ms)
S MAJ 5.0 --
S MAJ 78
S MAJ 85 --
S MAJ 170
SMAJ170A/CA
u




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