Electrical Ratings

Items

Test Condition/Description

Requirement

Varistor Voltage

The voltage between two terminals with the specified measuring current 1mA.DC applied is called

Vb.

To meet the

Specified value

Maximum Allowable

Voltage

The recommended maximum sine wave voltage (RMS) or the Maximum DC voltage can be

applied continuously.

Maximum Clamping

Voltage

The maximum voltage between two terminals with the specification standard impulse current.

Applied waveform: 8/20

μs

Rated Wattage

The maximum average power that can be applied within the specified ambient temperature.

Energy

The maximum energy within the varistor voltage change of

±10% when one impulse of 10/1000μs

or 2ms is applied.

Withstanding Surge

Current

The maximum current within the varistor voltage change of

±10% with the standard impulse

current (8/20

μs) applied one time.

Surge Life

The change of Vb shall be measured after the impulse listed below which is applied 10,000 times

continuously with the interval of ten seconds at room temperature.

7

Φ series

180K to 680K

15A (8/20

μs)

820K to821K

50A (8/20

μs)

Δ

VbVb≤±10%

T

30% max.

t

I

B

C

1.0

0.9

0.5

0.1

0.0

T1=1.25*T=8

μs±20%

T2=20

μs±20%