A Latching Current Limiter is a resettable fuse, an electronic component that detects over-current events, and interrupts the flow of current, preventing damage to downstream components.

Latching Current Limiters detect if the current flowing through them is higher than a pre-configured threshold, and open. This stops the current from flowing any further and potentially damage other components.

Latching Current Limiters on non-critical power rails are usually reset via an external signal (e.g. emitted by the OBC), and resume operation. On critical rails (e.g. the OBC input power), the limiter will usually reset after a sufficient time has passed. In both cases, the component is not damaged by the over-current and resumes normal operation once reset.