: As a Polyswitch, it is designed to trip during a short circuit and reset after the fault is removed and the device cools down. However, it can fail permanently if subjected to a severe short.
For sourcing replacement components or viewing similar industrial parts, you can check retailers like DigiKey or Mouser. D SUB MIXED FE 20 A S POWER CONTACT PL3 f4901 1.1a 24v schematic
: If a laptop has a working external display but no internal backlight, F4901 is a primary "blown" suspect. : As a Polyswitch, it is designed to