Littelfuse, Inc. announced the release of the MMIX1T500N20X4 X4-Class Ultra-Junction Power MOSFET. This 200 V, 480 A N-channel MOSFET features an exceptionally low on-state resistance (RDS(on)) of just 1.99 mΩ, enabling superior conduction efficiency, simplified thermal management, and improved system reliability in power-dense designs. (View the video.)
The MMIX1T500N20X4 utilizes a high-performance, ceramic-based, isolated SMPD-X package with topside cooling for optimal thermal management. Compared with existing state-of-the-art X4-Class MOSFET solutions, the device offers up to 2× higher current ratings and as much as 63% lower RDS(on), enabling engineers to consolidate multiple paralleled low-current devices into a single high-current solution.
Features and Benefits include: 200 V blocking voltage, ultra-low RDS(on) of 1.99 mΩ for minimized conduction losses; High current capability (ID = 480 A) reduces the number of parallel devices needed; Compact SMPD-X isolated package with 2500 V isolation and improved thermal resistance (Rth(j-c) = 0.14 °C/W); Low gate charge (Qg = 535 nC) reduces gate drive power requirements; Simplified thermal management with topside-cooled packaging.
Together, these features deliver higher power density, reduced component count, and easier assembly—resulting in more efficient, reliable, and cost-effective system designs.
The MMIX1T500N20X4 is ideally suited for: DC load switches; Battery energy storage systems; Industrial and process power supplies; Industrial charging infrastructure; Drones and vertical take-off and landing (VTOL) platforms.
The MMIX1T500N20X4 delivers an ultra-low RDS(on) of 1.99 mΩ with a 480 A current rating, reducing conduction losses and heat. Replacing multiple paralleled MOSFETs with a single device simplifies designs, lowers component count, and boosts overall system efficiency.
This MOSFET is ideal for high-current, low- to moderate-voltage systems where efficiency and reliability are critical. Typical uses include DC load switches, battery energy storage, industrial power supplies, charging infrastructure, and drone or VTOL power electronics.
The high-performance, ceramic-based SMPD-X package offers excellent thermal resistance (Rth(j-c) = 0.14 °C/W) and 2500 VRMS isolation, enabling higher power density and safer operation. Its topside-cooled design simplifies thermal management, reduces system size, and enhances long-term reliability.
The MMIX1T500N20X4 is available in tube (20 pieces) or tape-and-reel format (160/reel). Submit sample requests through authorized Littelfuse distributors worldwide.
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