7.2 mOhm Rds(on) — sizing the conduction loss budget
The BTS500851TMBAKSA1 is a single-channel high-side power switch from Infineon's PROFET family, built with a vertical N-channel MOSFET and integrated charge pump.
Load voltage reach: 5 V to 58 V
The load supply range spans 5 V to 58 V. The switch operates without a Vcc supply pin — the gate drive is self-powered from the load voltage, which simplifies the BOM by eliminating a separate bias rail.
Fault protection suite
Built-in protection includes fixed current limiting, open load detection, over-temperature shutdown, and over-voltage clamp. The Auto Restart feature means the switch attempts to re-enable after a thermal fault once the junction cools, which suits loads that see transient overloads like lamp inrush or motor start.
Last Buy — planning the final order window
Infineon lists this part with a Last Buy lifecycle status. That means the production end date has been announced and there is a finite window to place final orders through the factory channel. For any BOM line using this switch, the decision is time-sensitive: secure the lifetime buy quantity now, or qualify a drop-in replacement before the last order date passes.
Package and mounting — TO-220-7 formed leads
The P-TO220-7-11 package uses formed through-hole leads with a staggered pinout. The large tab provides the primary thermal path — bolt it to a heatsink or solder it to a board-level copper island. The 7-pin layout is specific to Infineon's PROFET high-side switches; verify the footprint matches the existing PCB land pattern before committing.