Typical on-resistance is 200 mOhm. At the 1.5 A maximum continuous output, the I²R conduction loss is 0.45 W.
The part does not require a separate Vcc supply — the gate drive is self-supplied from the load pin, simplifying the PCB layout to a single power rail.
Fault protection set — five monitored conditions
The BTS40K21ENCXUMA1 integrates current limiting, open load detection, over-temperature shutdown, over-voltage clamp, and under-voltage lockout. Open load detect is particularly useful for lamp or solenoid diagnostics in body-control modules — it reports a disconnected load without a separate sense resistor.
AEC-Q100 qualification — under-hood temperature grade
The part is listed under the Automotive, AEC-Q100 series.