MOSFET for power electronics applications in uncrewed aircraft and charging offered by Littelfuse

The MMIX1T500N20X4 uses a ceramic-based isolated SMPD-X package with topside cooling to consolidate several devices into one high-current solution.
Jan. 27, 2026
The Littelfuse MMIX1T500N20X4 X4-class ultra-junction power metal oxide silicon field-effect transistor (MOSFET) is for uncrewed aircraft applications.

Summary points:

  • Littelfuse introduces the MMIX1T500N20X4 for high-efficiency power management in uncrewed aircraft and industrial systems.
  • Features low RDS(on) and topside cooling in a ceramic-based isolated SMPD-X package for improved reliability and heat dissipation.
  • Replaces multiple paralleled devices, simplifying design while increasing system density and efficiency.

ROSEMONT, Ill. – Littelfuse Inc. in Rosemont, Ill., is introducing the MMIX1T500N20X4 X4-class ultra-junction power metal oxide silicon field-effect transistor (MOSFET) for uncrewed aircraft applications.

The MOSFET is for high-current, low- to moderate-voltage systems where efficiency and reliability are critical, such as DC load switches, battery energy storage, industrial power supplies, and charging infrastructure.

This 200-volt, 480-amp N-channel MOSFET features low on-state resistance (RDS(on)) for conduction efficiency, simplified thermal management, and improved system reliability in power-dense designs.

Topside cooling

The MMIX1T500N20X4 uses a ceramic-based isolated SMPD-X package with topside cooling to enable engineers to consolidate several paralleled low-current devices into one high-current solution.

The MMIX1T500N20X4 is available in tube (20 pieces) or tape-and-reel format (160/reel). Submit sample requests through authorized Littelfuse distributors.

For information contact Littelfuse online at https://www.littelfuse.com/products/power-semiconductors-control-ics/mosfets-si-sic/n-channel-ultra-junction/x4-class/mmix1t500n20x4.

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John Keller

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John Keller is the Editor-in-Chief, Military & Aerospace Electronics Magazine--provides extensive coverage and analysis of enabling electronics and optoelectronic technologies in military, space and commercial aviation applications. John has been a member of the Military & Aerospace Electronics staff since 1989 and chief editor since 1995.