The reference (often paired with 1.1A 24V ) refers to a specific surface-mount Polyswitch resettable fuse (PTC) commonly found in Dell and Lenovo laptop motherboards, particularly around the USB or LCD power rails.

Optimized for 30V (drain-to-source), making it highly suitable for 24V bus systems.

, particularly in Dell laptop internal schematics or specialized automotive controllers. Possible Interpretations of "F4901"