SVC821D-10A データシートの表示（PDF） - SAMWHA ELECTRIC

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SVC821D-10A

SVC Varistors Type

SAMWHA ELECTRIC 

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.

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 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.

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.

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.

Rated average power dissipation : Ptam

Maximum average power that can be applied within the

specified ambient temperature.

132 SAMWHA CAPACITOR Co., Ltd.

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