KNPA2WJ0201A19 is part of Royal Ohm's series of metal oxide varistors, which are designed to provide surge protection against overvoltage transients and electric noise. The KNPA2WJ0201A19 is an industry-standard radial leaded varistor that has a dv/dt rating of 1500 V/µs, an AC voltage rating of 275 VAC, and a 10/1000 µs current rating of 1.5 kA. This varistor can be used on industrial, commercial, automotive, and consumer electronic circuits to regulate high-voltage transients, providing increased safety and reliability.