50 mOhm Rds(on) — sizing the conduction loss for a 5.8 A load
The Infineon BTS426L1E3062ABUMA1 is a single-channel PROFET smart high-side switch rated for continuous load currents up to 5.8 A. Its typical on-resistance of 50 mOhm sets the conduction loss floor: at 5.8 A the dissipation is roughly 1.7 W before any derating for junction temperature.
This means Infineon has flagged the part for eventual discontinuation; new designs should not start with it.
Fault protection suite — what trips and what resets
The part integrates fixed current limiting, open-load detection, over-temperature shutdown, over-voltage clamping, and under-voltage lockout (UVLO). The Auto Restart feature means the switch attempts to re-energise after a fault clears — useful for lamp or motor loads where a temporary overload is expected, but something to account for in the system fault-handling logic. Input is a simple On/Off non-inverting logic signal; no Vcc supply is required for the logic side — the switch is self-powered from the load rail.
TO-263-5 D²Pak — thermal pad and footprint
The package is a TO-263-5 (D²Pak) with four leads plus the exposed tab. The supplier device code is PG-TO263-5-2. The 5V to 34V load voltage range covers 12V and 24V automotive and industrial rails, with margin for load-dump transients.