40 V automotive-grade N-channel
The AUIRF3504 is an N-channel HEXFET® MOSFET from Infineon, rated for 40 V drain-source and 87 A switching current — the voltage ceiling gives margin on a 12 V automotive bus during load-dump transients, while the current rating supports high-power solenoids, DC-DC stages, and motor pre-drive circuits.
Temperature range and package
Junction temperature range spans -55 to 175 °C — this is the automotive Grade 0 band, meaning the die and package are qualified for under-hood and engine-bay environments where ambient can reach 125 °C and self-heating adds margin. Through-hole mounting with bulk packaging — the part ships in tubes or trays, not tape-and-reel. For a pick-and-place line, verify the tube compatibility with your feeder system, or plan for manual insertion on lower-volume builds. Maximum gate-source voltage is ±20 V — the gate oxide breakdown threshold. A 10 V drive is safe, but any ringing or overshoot on the gate node must stay within this window; a 15 V Zener clamp across gate-source is common practice in noisy environments.
No pin-compatible direct replacement from the same family is listed — the AUIRF3504 is the baseline order code.