Mitsubishi Electric to Begin Shipping 5th-Gen SiC-MOSFET Samples in Late June
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Mitsubishi Electric will begin shipping fifth-generation silicon-carbide MOSFET bare-die samples in late June, cutting on-resistance by roughly 25% — the latest move in the race for better EV power chips.
What exactly is shipping?
Two fifth-generation SiC-MOSFET bare dies, shipping in batches to module-packaging customers from late June.
SiC-MOSFETs — power-switching chips made from silicon carbide — are the core component in an EV's electric-drive system.
The form factor is bare die, not packaged parts. This means → Mitsubishi Electric is targeting module makers downstream, who will package the dies before supplying automakers.
On-resistance down 25% — what does that do for the car?
The new generation uses Mitsubishi Electric's proprietary trench structure, reducing on-resistance by roughly 25% versus current products — what the company calls an industry-leading level.
In plain terms = on-resistance is the energy wasted as heat when current flows through the chip; cut it, and more electricity reaches the wheels.
Direct payoff: lower power loss in inverters and eAxles — integrated drive units combining motor, gearbox, and inverter — plus room to shrink the system, ultimately translating into longer driving range.
What about long-term reliability?
Mitsubishi Electric says its proprietary process suppresses performance degradation, keeping on-resistance and power loss stable over years of use.
This means → the chip should not noticeably weaken after years on the road, supporting inverter and eAxle durability.
The caveat: these are still samples. Whether the same performance consistency holds in mass production is, by Mitsubishi Electric's own account, the key validation milestone ahead.
From samples to mass production — what's still missing?
Between bare-die samples and automotive-grade volume shipment lie three gates: module packaging → automotive qualification → batch delivery.
This reflects a broader shift: SiC power-chip competition has moved from "who can make it first" to "who can ship it at scale, reliably."
Put simply = leading on sample performance is step one; replicating that 25% resistance advantage on the factory floor at volume is what actually determines market share.
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