The DV 230 K 4032 from Bourns is a Medium Voltage Varistor that has been designed to protect electronic equipment against high voltage surges in the medium voltage region.  It has an AC voltage rating of 230 V (RMS), a DC voltage rating of 300 V, and a clamping voltage of 595 V. This varistor provides superior transient energy absorption due to its improved energy volume distribution and power dissipation. It is packaged in a leadless chip design, which offers zero inductance to facilitate very fast response time to transient surges. This varistor is available in a surface-mount package that measures 10 x 8 x 2 mm.