This standard specifies the test method for metal oxide varistors (hereinafter referred to as MOV) used in power lines, communication lines, or signal lines of 1000 V AC or less or 1500 V DC or less. MOVs are designed to protect equipment and/or parts of equipment from high voltage transients.
JIS C 5381-331:2006 Referenced Document
JIS C 0025:1988 Basic environmental testing procedures Part 2: Tests Test N: Change of temperature
JIS C 5381-1:2004 Surge protective devices connected to low-voltage power distribution systems -- Performance requirements and testing methods