Silicon Power Devices Keep Earning Their Place

Wide-bandgap devices get most of the attention, but silicon power MOSFETs and IGBTs remain the workhorses of power conversion in 2026, and they keep improving. The reason is straightforward: most converters run at moderate frequency and high current, where a silicon device's combination of low conduction loss, ruggedness and cost is hard to beat. IXYS's HiPerFET MOSFETs, low-VCE(sat) IGBTs and fast recovery diodes sit at the center of that class, and the trends in 2026 reward the designers who choose the right silicon device for the job.

Ruggedness as a Design Requirement

Real converters see inductive loads, inrush and transients, and a device that tolerates avalanche events survives them without an external clamp. IXYS built its reputation on rugged devices, and the HiPerFET process is the clearest example: a fast, low-on-resistance MOSFET with an avalanche-rated body diode. Through 2026, designers are valuing that ruggedness more, not less, because equipment is expected to survive a wider range of field conditions and to last longer without service.

Conduction Loss and the Low-VCE(sat) IGBT

At high current and moderate frequency, conduction loss dominates, and a low saturation voltage is the lever that matters. The ultra-low VCE(sat) IGBTs, with a typical saturation voltage of 1.8 V at 600 V, reduce conduction loss in motor drives, UPS and choppers, while the HiPerFAST family favors switching speed for high-frequency supplies, welding and induction heating. Offering both lets a designer match the device to the operating point rather than compromising.

Fast Recovery Diodes and EMI

The freewheeling diode drives a large share of switching loss and EMI, and the choice between a fast and a soft recovery diode is a real design decision. A very short recovery time minimizes loss, while a softer recovery limits overshoot and ringing and can remove a snubber. In 2026, designers are paying more attention to this trade-off because EMC compliance and efficiency are both under pressure, and IXYS offers both recovery behaviors in the same package family.

Isolated Packages for Simpler Assembly

The isolated TO-247AD and SOT-227B packages let several devices share a common heatsink without an extra insulating layer, which simplifies the mechanical design and improves heat transfer. As converters grow in power density, this packaging advantage matters more, because the cooling system often sets the enclosure size.

Thyristors in Industrial Power

Thyristors remain essential in high-power phase control and rectification, where their latch-on behavior and very high surge capability are advantages. Soft-start of motors and transformers, electrolysis rectifiers and heavy DC drives still rely on SCR modules, and in 2026 the trend is toward higher integration and lower on-state voltage rather than replacement by transistors. For hundreds of amps and fault currents, a thyristor is often the most rugged and cost-effective choice.

Where Wide-Bandgap Fits

Silicon carbide takes the very high-frequency, very high-efficiency stages where silicon loss becomes prohibitive, but it does not replace silicon everywhere. The sensible approach is to use silicon for moderate frequency and high current, and wide-bandgap devices where frequency and efficiency genuinely pay. An experienced distributor helps make that comparison on the customer's operating point.

Thermal Design Remains Central

Because device loss and cooling are coupled, thermal design remains central regardless of the device family. Verifying case temperature under load, using a thin uniform interface and mounting devices with the specified torque are habits that pay off in every converter.

What It Means for Designers

For a new design in 2026, the practical advice is to choose the silicon device that matches your frequency and current, use the isolated packages to simplify cooling, and validate the choice on the bench. With a broad portfolio of MOSFETs, IGBTs, thyristors and diodes, IXYS gives designers the range to make that choice, and BeiLuo supports it with authorized stock and FAE engineering.

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 devices will continue to serve the bulk of power conversion in 2026 and beyond, and the trend is toward ruggedness, low loss and simpler assembly. IXYS's device families sit at the front of that trend, and customers who choose them benefit from reliable performance and predictable supply.