The Infineon BTS4141NNT is a single-channel high-side power switch with an N-channel output, designed for general-purpose on/off switching of resistive, inductive, and lamp loads. It integrates a 150 mOhm typical Rds(on) power MOSFET with a 12V to 45V load voltage range and delivers up to 700 mA continuous output current. The switch is self-protected with fixed current limiting, over-temperature shutdown, and over-voltage clamping, and it features an auto-restart function that re-enables the output after a fault condition clears.
The 12V to 45V load supply covers standard 12V and 24V industrial rails and 24V/48V automotive nominal buses, but the 45V absolute maximum means the switch cannot survive a 48V truck system without external clamping. The 700 mA continuous output current is the DC limit; for pulsed or lamp-inrush loads the internal current limiting (fixed) will fold back the output, so the load must be sized to stay below the trip threshold during steady-state.
Obsolete — finding a replacement
The BTS4141NNT is officially listed as obsolete. Any candidate should match the output configuration (high-side, N-channel), the load voltage range, the 700 mA current rating, and the SOT223 footprint if a drop-in is required. The auto-restart feature is not universal among high-side switches, so designs that rely on it may need a logic change or a different fault-handling strategy.