IN Brief:
- Vishay has introduced four 650V superjunction MOSFET power modules in the industry-standard SOT-227 package.
- Three single-switch devices are rated at 50A, 100A, and 150A, while a 50A chopper version integrates a 650V SiC diode.
- Samples and production quantities are available now, with Vishay quoting current lead times of 12 weeks.
Vishay Intertechnology has introduced four 650V power modules using superjunction MOSFETs in the SOT-227 package, extending its industrial power semiconductor range across current ratings from 50A to 150A.
The devices comprise three single-switch modules and one low-side chopper configuration. The VS-FC50SA65 is rated at 50A, the VS-FC100SA65 at 100A, and the VS-FC150SA65 at 150A, while the 50A VS-FC50LA65 adds an integrated 650V silicon carbide diode.
All four use the established SOT-227 power-module footprint. Maintaining that mechanical format gives equipment developers another semiconductor option for converters already built around the package, although electrical characteristics, gate drive, switching behaviour, and thermal performance still have to be checked before one module is substituted for another.
Typical drain-source on-resistance is 44mΩ for the 50A single-switch device, 22mΩ for the 100A version, and 14.8mΩ for the 150A module. The 50A chopper version is specified at 45mΩ.
The fall in resistance at the higher current ratings is accompanied by an increase in gate charge. Vishay specifies 167nC for the two 50A devices, 338nC for the 100A version, and 508nC for the 150A module. Those figures illustrate the trade between conduction loss and the amount of charge the gate driver must move during each switching event.
Superjunction silicon remains widely used in 600V and 650V power stages where switching frequency, efficiency, cost, and established gate-drive behaviour favour a silicon solution over a wide-bandgap device. The architecture reduces the resistance penalty traditionally associated with high-voltage silicon MOSFETs by controlling the electric field through alternating doped regions in the device structure.
Vishay’s chopper module combines a superjunction MOSFET with a silicon carbide diode. A SiC Schottky diode has negligible reverse-recovery charge compared with conventional silicon PN junction devices, reducing one source of switching loss and electrical stress in converter topologies that require a separate freewheeling or commutation path.
The module package supports applications where current and heat flow are too high for a small surface-mount transistor. SOT-227 devices can be mounted to dedicated cooling hardware and use large screw or solder terminals to carry the power path without routing the entire load current through conventional PCB tracks.
That mechanical arrangement is established across industrial converters, uninterruptible power supplies, renewable-energy equipment, chargers, welding systems, rail power, and other equipment where modular semiconductor assembly simplifies cooling and service.
Vishay lists solar inverters, hydrogen generation and fuel-cell systems, HVDC auxiliary electronics, charging stations, DC-DC converters, DC-AC inverters, switch-mode power supplies, welding and cutting equipment, lighting systems, rail power supplies, and medical imaging among the intended uses for the new devices.
The modules are specified across an operating temperature range from -55°C to +150°C. The usable current in a finished converter will still depend on the case temperature, switching frequency, heatsink performance, duty cycle, thermal interface, and losses produced by the selected operating point.
Package compatibility therefore simplifies the mechanical side of an upgrade without eliminating electrical validation. A replacement device may fit the same mounting pattern while requiring a different gate resistor, dead time, snubber arrangement, thermal design, or protection setting to achieve the expected switching performance.
The relationship between on-resistance and gate charge is particularly important where converter frequency is high. Lower resistance cuts conduction loss while the MOSFET is on, but higher gate charge increases the energy required from the driver and can affect switching transition times.
The VS-FC50LA65 adds another variable through its integrated SiC diode, giving the module a defined current path for chopper applications without requiring a separate external diode package. The remaining three products provide straightforward single-switch building blocks that can be used in several converter arrangements.
Vishay has released the range directly into commercial availability rather than beginning with an extended pre-production sampling phase. Samples and production quantities are available now, with the company quoting current lead times of 12 weeks.
The new modules sit alongside other silicon and silicon carbide power products rather than replacing the wider range. Their role is to extend 650V superjunction MOSFET technology into a familiar high-current mechanical platform, giving existing SOT-227 designs another component option across several current levels.
Qualification of the final converter remains dependent on switching loss, thermal performance, insulation, fault behaviour, electromagnetic compatibility, and application-specific lifetime requirements. Vishay has supplied the electrical and mechanical building blocks; system performance will be determined by how those modules are driven, cooled, protected, and integrated into the surrounding power stage.
