The Schurter PC Board Non Resettable Fuse (0034.4226) is a fast-acting (F-type) thermal fuse designed for direct PCB mounting in low-voltage AC/DC circuits up to 125V. Installation requires soldering directly to board traces in protected circuits. Critical verification: confirm board layout spacing and trace current capacity match 3.15A continuous rating and thermal environment stays within -25°C to +85°C operating window.