A guide from BrightKing that explains MOV operation, features, typical circuits, specifications and selection tips.
The document introduces Metal Oxide Varistors (MOV) and explains how they protect circuits from surge voltages. It describes the working principle, key characteristics, typical application circuits and the importance of proper selection.
It also provides detailed parameter tables for specific part numbers, naming conventions, and the full BrightKing MOV product line, including special TMOV devices with built‑in temperature fuses. This manual is written in Chinese.
V1mA should be greater than or equal to (1 + a) × (1 – b) × (1 – c) × VPa, where a is the power‑line fluctuation factor, b the voltage tolerance and c the aging coefficient.
TMOV is a MOV with an integrated temperature fuse; the fuse opens before the MOV can short‑circuit and burn, providing an open‑circuit failure mode.