I’ll research Littelfuse’s 1812L200/12DR datasheet, verify alternatives and ordering details, and save a cited Application & Usage Guide in the project files.
I’ve verified the main ratings and two functional alternatives; the guide will flag the temperature-dependent hold current and the fact that a tripped PPTC does not fully disconnect power. I also found that this project’s MPN property says 1812L150/12DR rather than 1812L200/12DR, which I’ll document without changing the part.
The Littelfuse 1812L200/12DR is a surface-mount polymeric positive-temperature-coefficient (PPTC) resettable overcurrent protector with a 2.00 A hold current at 20°C in still air and a 12 Vdc maximum voltage. Its common application is series protection of a low-voltage peripheral or power branch where a recoverable, current-limiting fault response is preferred to replacing a one-time fuse; a tripped PPTC is not an open-circuit disconnect. Littelfuse PPTC operating guidance
*Research date: October 7, 2026. Scope: practical schematic integration, PCB implementation, substitution, and ordering—not certifica...
Created and verified the 1812L200/12DR Application & Usage Guide in project files, covering all seven requested sections with citations, two functional alternatives, and explicitly flagged verification gaps.
Important finding: the project’s MPN property identifies a different part than its title; I documented the mismatch without changing the component. Before using it in production, correct that metadata and verify the complete land pattern.