Silicon MOSFETs Keep Improving

Wide-bandgap devices get most of the attention, but silicon power MOSFETs remain the workhorses of power conversion in 2026, and they keep improving. Two families do most of the work: the Shielded Gate Trench (SGT) MOSFET at low voltage, and the Super Junction MOSFET at high voltage. Each uses a structural innovation to lower on-resistance and gate charge at the same time, which is why a modern silicon MOSFET is far more efficient than one from a decade ago. NCE Power is an integrated device maker whose portfolio spans both families, and the trends in 2026 reward the designers who choose the right family for the job.

SGT MOSFETs at Low Voltage

The SGT structure shields the gate from the drain, which sharply reduces the gate charge while lowering on-resistance. The result is an excellent gate-charge times on-resistance figure of merit, so a low-voltage MOSFET switches fast with little drive power. That is exactly what synchronous rectification and high-frequency DC-DC conversion need, and it is why SGT MOSFETs dominate those applications. As on-resistance falls toward one milliohm, high-current battery and motor systems can use a single device where several parallel parts were once needed, which saves space and improves current sharing.

Current Density

Falling on-resistance raises current density, so a small surface-mount package can carry more current than before. That lets a designer shrink the DC-DC stage and the battery-protection circuit, which matters in space-constrained equipment. The thermal path moves into the PCB, so the layout and the copper area become part of the thermal design.

Super Junction at High Voltage

At high voltage, a Super Junction MOSFET uses charge balance to lower on-resistance sharply for a given voltage, so a 600 V or 650 V switch conducts with much less loss than a conventional planar device. That is why Super Junction MOSFETs dominate offline power-factor correction and high-frequency supplies. The trend in 2026 is toward lower gate charge and better body-diode recovery, because the body diode of a super-junction device can otherwise introduce recovery loss and ringing in bridge and LLC converters.

Body-Diode Recovery

In a full-bridge, half-bridge or LLC converter, the body diode conducts during the dead time, so its recovery affects loss and EMI. Families that enhance the body-diode recovery, such as the NCE SJ-III TF series, reduce that loss and simplify EMC. Designers are paying more attention to this characteristic because efficiency and EMC are both under pressure.

IGBTs at Moderate Frequency

At moderate frequency and high current, the IGBT remains the most cost-effective switch because its low saturation voltage keeps conduction loss small. A modern Trench Field-Stop IGBT such as the NCE TD family offers a 1.7 V saturation voltage and a short-circuit withstand, which suits PFC, supplies and industrial drives. IGBTs are not being replaced; they are being used where their low on-state voltage wins.

What It Means for Designers

For a new design in 2026, the practical advice is to match the device family to the voltage and the frequency. Use an SGT MOSFET for low-voltage, high-current, high-frequency conversion, a Super Junction MOSFET for high-voltage, high-frequency offline conversion, and an IGBT for high-voltage, high-current, moderate-frequency conversion. With a broad portfolio covering all three, NCE Power gives designers the range to make that choice.

Thermal Design Remains Central

Because on-resistance and saturation voltage both vary with temperature, the thermal design remains central. Verifying case temperature under load, using a thin uniform interface and sizing the PCB copper for a surface-mount part are habits that pay off in every converter.

Supply and Documentation

Authorized supply and complete documentation matter as much as the silicon. A distributor that holds genuine stock and provides import declarations, certificates of origin and RoHS files on every order removes risk from the production schedule, and engineer-level support shortens the path from selection to a released design.

Outlook

Silicon power MOSFETs and IGBTs will continue to serve the bulk of power conversion in 2026 and beyond, and the trend is toward lower on-resistance, lower gate charge and better body-diode recovery. NCE Power's SGT and Super Junction families sit at the front of that trend, and customers who choose them benefit from reliable performance and predictable supply.