What this PROFET switch does in a power distribution design
The typical 2.8 mOhm on-resistance is the standout parametric here. At a 10 A continuous load, conduction loss is just 0.28 W — low enough that the TO-218-5 package can dissipate it without a heatsink in still air at 25°C ambient, provided the PCB copper area under the tab is adequate. The 90 A maximum output rating is a pulsed peak; the real continuous current is set by the junction temperature budget, the load voltage, and the thermal resistance of the mounting interface.
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Load voltage range and application fit
The switch handles a 5 V to 34 V load supply, covering automotive 12 V (nominal 13.5 V, load-dump to 34 V), truck 24 V systems, and industrial 24 V PLC buses. The through-hole TO-218-5 package (also known as TO-218AB/5) provides a large copper tab for heatsink attachment, making it a practical choice for high-current retrofit or repair applications where a surface-mount D²PAK would need a thicker PCB.
Fault protection set — what is covered
Four integrated fault protections reduce external component count: fixed current limiting prevents the switch from exceeding a safe current level during a short circuit; open load detection flags a disconnected harness or blown fuse; over-temperature shutdown protects the die if the heatsink is undersized; and over-voltage clamping absorbs load-dump transients up to the 34 V load supply maximum. The input is non-inverting — a logic high turns the output on — and no external Vcc supply is needed; the charge pump runs from the load voltage.