The guide is drafted with onsemi ratings and alternative-part comparisons. I’m checking the circuit description and citations, and tightening the distinction between verified replacements and conditional alternatives.

Created and checked the BSS138 Application and Usage Guide in the project files, covering all seven requested sections with cited ratings, practical I²C wiring, alternatives, and sourcing guidance. Unverified footprint dimensions, alternative pinout details, and live purchasing data are explicitly identified rather than assumed.