What this high-side switch does in your power rail
The BTS500101TAEATMA1 is a single-channel high-side N-channel power switch from Infineon's Automotive PROFET family, qualified to AEC-Q100. It switches loads from 8 V to 18 V and delivers up to 48 A continuous — a rating that suits heavy inductive or resistive loads like DC motors, solenoids, and pre-heaters in 12 V automotive body electronics. The 1.6 mOhm typical Rds(on) keeps conduction losses low at high current; at 48 A the dissipation is roughly 3.7 W at 25 °C junction, which rises with temperature per the normalised curve. That means the TO-263-7 package needs a solid copper pour on the tab — the exposed paddle is the primary thermal path, not still air.
Protection and control — what is built in
Fault protection covers over-temperature, over-voltage, and short-circuit events, so the switch can survive a stalled motor or a load dump without an external clamp. The input-to-output ratio is 1:1 with a non-inverting input — logic high turns the load on, no inversion stage needed. No external Vcc supply is required; the device is self-powered from the load voltage, which simplifies the BOM for a simple on/off function.
The base product number is BTS50010; the full order code includes the tape-and-reel suffix for automated assembly. Confirm the mating half and PCB footprint before committing — the TO-263-7 (D²Pak) footprint is standard but the tab is electrically live (drain).
How it compares to the BTS142DATMA1
The BTS142DATMA1 is a low-side switch (output type low side) with 23 mOhm Rds(on) and 4.6 A max output, while the BTS500101TAEATMA1 is a high-side switch with 1.6 mOhm and 48 A. They are not functional substitutes — one switches the ground path, the other the supply rail.