SAMWHA CAPACITOR Co., Ltd.

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Capacitance

Typical values measured at a test frequency of 1kHz

Rated peak transient current : itm

Maximum peak current through the varistor with line voltage

applied.

The maximum peak current with in the varistor voltage change

ratio of ±10% with the standard 8/20㎲ impulse current applied

two times at 5 minute interval.

Rated transient energy : Wtm

Maximum allowable energy for a single impulse of 2ms

square-wave current waveform with rated continuous voltage

applied. Maximum energy rating base on a shift of Vnom of

less than ±10% of initial value.

Pulse lifetime rating

This is expressed as the maximum allowable number of

impulse currents applied.

8/20㎲ impulse current(or 2ms square wave) is applied at

prescribed interval.

This curve also provides for derating current as required with

repetitive pulsing.

Test current waveform

Characteristics tests for Varistors are carried out by using 8/20㎲

test impulses Data such as the maximum clamping

voltage(Vc)and the transient peak current(Itm) are obtained by

using this impulse current

However, for the Vc characteristics of the Axial Package type a

10mA DC squarewave current is used to cary out the test.

Rated RMS Voltage : Vacm

Maximum continuous sinusoidal RMS voltage at 50/60Hz which

may be applied.

Rated DC Voltage : Vdcm

Maximum continuous DC voltage which may be applied.

Rated average power dissipation : Ptam

Maximum average power that can be applied within the

specified ambient temperature.

Surface Mount Disc Capacitors

Surface Mount Disc Capacitors

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