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SMAJ530 Datasheet(PDF) 2 Page - General Semiconductor

Part # SMAJ530
Description  SURFACE MOUNT TRANSZORB??TRANSIENT VOLTAGE SUPPRESSOR
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Manufacturer  GE [General Semiconductor]
Direct Link  http://www.vishay.com
Logo GE - General Semiconductor

SMAJ530 Datasheet(HTML) 2 Page - General Semiconductor

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0
1.0
2.0
3.0
4.0
0
100
150
50
0.1µs
1.0µs
10µs
100µs
1.0ms
10ms
0.1
1.0
10
100
0
50
100
150
0
25
50
75
100
25
75
125
175
1,000
10,000
MAXIMUM RATINGS AND CHARACTERISTIC CURVES SMAJ530 AND SMAJ550
FIG. 1 - PEAK PULSE POWER RATING CURVE
td, PULSE WIDTH, sec.
TA, AMBIENT TEMPERATURE, °C
FIG. 3 - PULSE WAVEFORM
t, TIME, ms
NON-REPETITIVE
PULSE WAVEFORM
SHOWN in FIG. 3
TA=25°C
PULSE WIDTH (td) is DEFINED
as the POINT WHERE the PEAK
CURRENT DECAYS
to 50% of IPPM
tr=10
µsec.
td
PEAK VALUE
IPPM
HALF VALUE - IPPM
2
10/1000
µsec. WAVEFORM
as DEFINED by R.E.A.
FIG. 2 - PULSE DERATING CURVE
RECOMMENDED PAD LAYOUT
The pad dimensions should be 0.010” (2.5mm) longer than the
contact size in the lead axis. This allows a solder fillet to form, see
figure below. Contact factory for soldering methods.
MODIFIED J-BEND
0.060 MIN
(1.52 MIN)
0.050 MIN
(1.27 MIN)
0.220 REF
(5.58)
0.094 MAX
(2.38 MAX)
Dimensions in inches and (millimeters)
Respect Thermal Resistance (PCB Layout) - as the temperature coefficient also
contributes to the clamping voltage.
Select minimum breakdown voltage, so you get acceptable power dissipation and
PCB tie point temperature. Devices with higher breakdown voltage will have a
shorter conduction time and will dissipate less power.
Clamping voltage is influenced by internal resistance - design approximation is
7V per 100mA slope.
Keep temperature of TVS lower than TOPSwitch® as a recommendation.
Maximum current is determined by the maximum TJ and can be higher than
300mA. Contact supplier for different clamping voltage / current arrangements.
Minimum breakdown voltage can be customized for other applications.
Contact supplier.
APPLICATION NOTES


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