The 10D270K MOV Metal Oxide Varistors are semiconductors whose resistance changes from a very high open circuit condition to a deficient short circuit condition to clamp any surge or voltage transient in an electrical circuit. It's used in Protection for semiconductors such as a transistor‚ diode‚ IC‚ thyristor‚ or TRAIC Relay and electromagnetic valve surge absorption‚ Surge protection in consumer electronics‚ Surge protection in industrial electronics‚ Surge protection in electronic household appliances‚ gas and petroleum appliances.