The IRF224 is an N-Channel hermetic MOS HEXFET from Infineon Technologies, rated for 250 V drain-source voltage and 3.8 A continuous drain current. Maximum power dissipation is 40 W, and the part comes in a through-hole TO-220 package supplied in bulk.
250 V drain-source rating means this MOSFET can handle typical 240 VAC rectified bus voltages with margin — it fits in offline power supplies and motor-drive circuits where the DC rail sits around 320 V after rectification. 40 W power dissipation at 25 °C case means the junction-to-case thermal path must be managed — a heatsink with adequate surface area and airflow keeps the junction below 175 °C under full load.