Providing high surge current overvoltage protection in compact package

Littelfuse, Inc. has released its new Pxxx0S3N SIDACtor Protection Thyristor Series, which protects exposed interfaces in industrial and ICT applications, including RS-485 data interfaces and AC/DC power supplies. Supplying equipment in harsh environments with increased protection from severe overvoltage transients aids designers in complying with regulatory requirements.

Offered in a compact DO-214AB (SMC) package, the series is intended to provide 3kA (8/20) high-power surge protection with low thermal accumulation during long-term overvoltage events. A vital advantage of the series is that the switching voltage is much lower than GDT, and the on-state voltage is much lower than MOV and TVS diodes.

The series is ideal for use in various applications where hazardous environments exist, including AC and DC power lines in factory automation, industrial / ICT applications, power interface of ESS, solar energy systems DC/AC inverters, UPS/AC high-power distribution grid, EV charging systems.

“Ongoing product miniaturization requirements result in an increasing demand for compact, high-power-density solutions,” said Ben Huang, senior product marketing manager, Protection Semiconductor Business at Littelfuse. “Compared to MOVs and TVS diodes, the Pxxx0S3N SIDACtor is significantly smaller, and it is the first product of its size to provide such high surge current protection in such a small package.”