IRFM140

The IRFM140 is a 100V N-channel power MOSFET housed in a TO-254AA hermetic package, manufactured by Infineon as part of their high-reliability discrete semiconductor portfolio for demanding environments. This device utilizes a planar stripe DMOS design optimized for low on-resistance and fast switching characteristics, which helps minimize conduction and switching losses in power conversion circuits. The TO-254AA package offers a lightweight, hermetically sealed metal-ceramic construction with through-hole mounting, delivering excellent thermal performance and mechanical integrity under wide temperature excursions, shock, and vibration typical of aerospace and defense platforms.

Typical applications include DC-DC converters, motor control drivers, solid-state power controllers, and load switching in satellite power systems, weapon platforms, and avionics where radiation tolerance and long mission life are critical. Procurement is driven by compliance with high-reliability screening standards, often referencing MIL-PRF-19500 JAN or JANTXV-level qualification, with options for radiation hardness assurance (RHA) depending on the specific ordering code. Engineering and supply chain teams should account for extended lead times, strict change notification requirements, and the necessity of traceability to the wafer level, as this class of component is managed under Infineon’s long-term HiRel supply program with controlled end-of-life roadmaps to support program sustainment.