Patent ID: 8803193

Claim:
An apparatus comprising: an overvoltage protection device comprising: a first node providing a connection to a node to be protected; a second node providing a connection to a discharge node; a control node; a bipolar transistor comprising a collector coupled to the first node, a base coupled to the control node, and an emitter coupled to the second node; a first component having a first impedance coupled between the control node and the discharge node; and a second component having a second impedance coupled between the second node and the discharge node, wherein a direct current (DC) holding voltage of the overvoltage protection device is based on a ratio between the first impedance and the second impedance; and a filter configured to attenuate a high frequency component of a transient overvoltage event such that an effect of the transient overvoltage event on an alternating current (AC) holding voltage of the overvoltage protection device is reduced, the filter comprising at least one of: a first capacitor connected between the first node and the discharge node; a second capacitor connected between the control node and the discharge node; or an inductor in series connection with the first node.