Engineering 101

Two New 650V SiC FET Packages for Designers Seeking More Powerful Performance


Two new UnitedSiC devices are offering designers more powerful performance.

The new products offer RDS(on) values of 30mohms (UF3C065030T3S) and 80mohms (UF3C065080T3S). The three-leaded, industry-standard TO220-3L package features enhanced thermal characteristics made possible by a sintered-silver packaging technology developed by UnitedSiC.

The new devices come in a 3-lead TO220 package option for applications such as EV charging, PV inverters, switch-mode power supplies, power factor correction modules, motor drives, and induction heating.

Both new SiC FET products are based on a UnitedSiC ‘cascode’ circuit configuration, in which a normally-on SiC JFET is co-packaged with a Si MOSFET to produce a normally-off SiC FET device. The device’s standard gate-drive characteristics allow a true “drop-in replacement” to Si IGBTs, Si FETs, SiC MOSFETs or Si superjunction devices on existing designs in which designers can expect a performance increase with lower conduction and switching losses, enhanced thermal properties and integrated gate ESD protection.

In the case of new designs, the UnitedSiC FETs deliver increased switching frequencies to gain substantial system benefits in both efficiency and reduction in size, and cost of passive components, such as magnetics and capacitors. The FAST Series devices offer not only ultra-low gate charge, but also the best reverse recovery characteristics of any device of similar ratings. These devices are excellent for switching inductive loads when used with recommended RC-snubbers, and any application requiring standard gate drive.

The UnitedSiC UF3C FAST SiC series, which now totals 14 devices, is available in a range of TO247-3L, TO247-4L, TO220-3L and D2PAK7-3L packages, with four 1200V and ten 650V options.

Price and availability

Prices are $5.18 for the UF3C065080T3S, and $13.79 for the UF3C065030T3S each at 1,000 pcs quantities. Stock is available from UnitedSiC’s global distribution partners Mouser and Richardson Electronics, and other local distributors.

Visit for more datasheets and for a SiC FET User Guide highlighting practical solutions and guidelines for using RC snubbers with fast switching SiC devices.

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