The 271KK07 from Yageo is a Metal Oxide Varistor that is ideal for transistor, diode, IC, thyristor, or triac semiconductor protection, surge protection in consumer electronics, industrial electronics, and electronic home appliances, gas, and petroleum appliances, and relay and electromagnetic valve surge absorption applications. It has an AC voltage rating of 175 V, a DC voltage rating of 225 V. This UL: E327997 safety-certified varistor has a power rating of 0.25 W and a clamping voltage of 455 V. It offers a fast response to protect sensitive electronic equipment from voltage transients and can absorb a large amount of transient energy. This varistor has a low clamping ratio and no follow-on current, which ensures proper disconnection. It is available in a through-hole package that measures 28.5 x 9 mm.