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20140922 / vpd_varistors_avr_en.fm
• All specifications are subject to change without notice.
Voltage Protection Devices
Overview of the AVR Series
TERMINOLOGY
1
8/20μs test waveform
2
10/1000μs test waveform
Item Unit Terminology
Varistor voltage
(Breakdown voltage)
V
1mA
(V)
Voltage measured across the varistor when DC1mA is applied.
Maximum continuous voltage
(Rated voltage)
Vdc
(V)
Maximum DC voltage that can be applied continuously.
Varistor leakage current: 50μA max. (Within the range of maximum allowable circuit voltage)
Clamping voltage
Vcl
(V)
Voltage appearing across the varistor when a pulse current (8/20μs
1
) of specified peak value is applied.
Maximum energy
E
(Joule)
Maximum energy that can be absorbed without deteriorating varistor characteristics when an impulse
current (10/1000μs
2
) is applied once.
Maximum peak current
Ip
(A)
Maximum current that can be withstood without deteriorating varistor characteristics when an impulse
current (8/20μs
1
) is applied once.
Capacitance
C
(pF)
Capacitance measured at 1kHz
(or 1MHz) of oscillator frequency and 1Vrms of oscillator voltage.
Insulation resistance
Rdc
(M: )
Insulation resistance appearing across the varistor when specified voltage is applied.
20μs
50%
90%
100%
Current
Time
8μs
1000μs
50%
90%
100%
10μs
Energy
Time
