Protects low current (e.g. logic supply) for faults and supply over voltage events.

Used to protect buck / step down regulators from excessive input voltage or current.

A small replaceable module with a self-resetting PTC fuse and over voltage shunt to provide protection to for example PSU1 (buck converters).

For use where supply voltages could exceed the downstream circuit capabilities, and an unattended high reliability installation is required.