Surge Absorber (VRD)

Rated power

The upper limit of power that can be continuously applied.

Excessive allowable power

Maximum allowable power when surges are applied with standard waveforms (8/20μs, 1.2/50μs, 10/1000μs).

Rated voltage

The upper limit of the voltage at which DC voltage can be applied continuously.

Breakdown voltage

The voltage that represents the characteristics of VRD, the voltage between terminals when the reference current “It” is applied.

Clamping voltage

The voltage between terminals when a current with a wave height of X (A) is applied, which is the voltage that can be controlled by VRD when an extremely large impulse current is applied.

Maximum clamping voltage

The maximum value of the clamping voltage, which is the maximum value of the voltage between terminals when the maximum allowable current Ipp (A) is applied at the wave height with standard surge waveforms 8/20μs and 10/1000μs.

Maximum allowable current

The maximum pulse current that VRD can handle.

Leakage current

The value of the current flowing through VRD when the rated DC voltage is applied.


Storage capacity of electric charge.

Reverse bias

A voltage applied in the opposite of the forward direction.

Avalanche effect

A phenomenon in which electricity flows in the reverse direction when a reverse bias exceeding the rated voltage is applied.