What this high-side switch delivers — 1.6 mOhm and 48 A in a TO-263-7
The BTS500101TADATMA2 is an Infineon Reversave™ automotive-grade high-side power switch rated for 48 A continuous output with a typical on-resistance of 1.6 mOhm. That Rds(on) figure is the lowest in the Reversave family — it keeps conduction loss under 3.7 W at full load, which the TO-263-7 D²Pak tab can sink into a copper plane without forced air. It operates from an 8 V to 18 V load supply (typical automotive battery rail) and requires no Vcc supply — the gate drive is self-biased from the load voltage. The single N-channel MOSFET switches on with a non-inverting On/Off input.
Fault protections that simplify the BOM
Four integrated fault protections — over-temperature, over-voltage, reverse battery, and short-circuit — eliminate the need for external clamp diodes, TVS, or current-sense resistors on most automotive loads. The reverse battery protection is particularly valuable for ECU inputs that must survive a misconnected jump start. The 1:1 input-to-output ratio means a single logic-level signal controls the switch; no PWM or diagnostic feedback pin is needed for basic on/off operation.
Sourced per RFQ — confirm current lead time and pricing against your BOM quantity.
How it compares to the BTS142DATMA1 — a lower-current sibling
The closest functional peer in the Infineon portfolio is the BTS142DATMA1, a low-side switch with 23 mOhm Rds(on) and 4.6 A output. The BTS500101TADATMA2 is a high-side switch with 1.6 mOhm — a 14× lower on-resistance and 10× higher current capability. The BTS142 uses HITFET® technology and includes auto-restart fault recovery; the Reversave™ part latches off on fault and requires a power cycle to reset.