F4901 1.1a 24v Schematic

A tripped PPTC will be physically hot to the touch.

The F4901 is often a proprietary marking (house number) used by Chinese OEM manufacturers. It is rarely the official datasheet name. Through reverse engineering and cross-referencing, we will uncover what this chip likely is and how to build or repair its circuit. f4901 1.1a 24v schematic