High-Voltage Workhorse: onsemi NDFP03N150CG MOSFET Quick Tech Overview
Looking for a tough 1500V MOSFET that can handle offline AC-DC conversion without breaking a sweat? Meet the NDFP03N150CG.
Specs at a glance: โข 1500 V drain-source rating โข 2.5 A continuous drain current โข R_DS(on) max 10.5 ฮฉ (typ 8 ฮฉ) โข Qg only 34 nC โ relatively fast switching for a 1500V part โข Full-pack TO-220F isolated package (no extra insulator needed) โข Avalanche energy 20 mJ for ruggedness
Typical use cases: - Primary switch in high-voltage flyback or quasi-resonant converters - LED lighting drivers (especially high-voltage input) - Industrial auxiliary power supplies - Capacitor discharge or snubber circuits
Itโs a 10V-drive device, so your gate driver needs to push close to 10โ12V for best performance. Switching losses stay reasonable up to a few hundred kHz in light-load conditions.
Pro tip: Because itโs now obsolete/NRND, if youโre still using it in production, start qualifying a drop-in or better replacement (newer onsemi 1500V SuperFET series often offer significantly lower R_DS(on) and Qg).
Anyone still designing with this part or its siblings? Whatโs the highest voltage bus youโve run it on? Share your experience below ๐