About SMP100LC

[UsernameA]

Hi Team,

It appears that the varistor turned on at a voltage lower than the value specified in the datasheet.

・​Detailed V-I characteristics of the varistor

・​How significant is the variation between individual varistors?

・Once a varistor turns on, does it remain on even after the power is turned off?

・What is the tolerance of VBO?​

・Does the failure mode of this varistor result in a short circuit?

Thanks

[FGUIT]

Hi,

V_BO specified on the datasheet is a maximum value, so it is normal to get a turn ON voltage lower than V_BO specified on datasheet (note that V_BO is measured according to figure 16 and 17 schematics). Turn ON voltage is between V_R value and V_BO value.

Regarding SMP100LC turn OFF: once SMP100LC turns ON, the only way to turn it OFF is to reduce the current below I_H value.

SMP100LC typically fails in short-circuit when absolute maximum ratings are exceeded.

Best regards.

Fabrice.