V18AUMLA1812WH Просмотр технического описания (PDF) - Littelfuse, Inc
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V18AUMLA1812WH Datasheet PDF : 9 Pages
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Surface Mount Varistors
Multilayer Transient Voltage Surge Suppressor
AUML Varistor Series
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Leakage Current (IL)
In the nonconducting mode, the device is at a very high impedance
(approaching 106Ω at its rated working voltage) and appears as an almost
open circuit in the system. The leakage current drawn at this level is very
low (<25µA at ambient temperature) and, unlike the zener diode, the
multilayer TVS has the added advantage that, when operated up to its
maximum temperature, its leakage current will not increase above 500µA.
Nominal Voltage (VN(DC))
This is the voltage at which the AUML enters its conduction state and
begins to suppress transients. In the automotive environment this voltage
is defined at the 10mA point and has a minimum (VN(DC) MIN) and
maximum (VN(DC) MAX) voltage specified.
Mechanical Dimensions
E
Explanation of Terms
Maximum Continuous DC Working Voltage (VM(DC))
This is the maximum continuous DC voltage which may be applied, up to
the maximum operating temperature (125oC), to the ML suppressor. This
voltage is used as the reference test point for leakage current and is
always less than the breakdown voltage of the device.
Load Dump Energy Rating (WLD)
This is the actual energy the part is rated to dissipate under load dump
conditions (not to be confused with the “source energy” of a load dump
test specification).
Maximum Clamping Voltage (VC)
This is the peak voltage appearing across the suppressor when meas-
ured at conditions of specified pulse current and specified waveform
(8/20µs). It is important to note that the peak current and peak voltage
may not necessarily be coincidental in time.
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