What this MOSFET is and where it fits
The Infineon IPB80N03S4L03 is a 30 V N-channel power MOSFET from the CoolMOS™ series, rated for 80 A continuous drain current at 25 °C case temperature. Its 3.7 mOhm maximum on-resistance at 10 V gate drive keeps conduction losses low in high-current paths like battery isolation, motor pre-charge, or DC-DC input stages. The TO-263 (D²Pak) surface-mount package with a large exposed tab allows the heat to flow into the PCB copper plane, making it a fit for automated assembly lines where a through-hole TO-220 would add a manual soldering step.
Package and mounting
The TO-263-3 (D²Pak) surface-mount package (supplier device package PG-TO263-3-2) has two leads plus the drain tab. The large tab is the primary thermal path; a solid via pattern under the tab to an inner-layer copper pour is standard practice for keeping the junction temperature in check at high current. The surface-mount format is compatible with reflow soldering and avoids the through-hole wave-solder step, which saves a process operation in volume assembly.
Lifecycle and sourcing
No last-time-buy or end-of-life notice is on record, so it can be specified into new designs with confidence.
