AUPO A-series thermal fuse is non resettable t hermal protection device with plastic casing. W hich is sensitive to the ambient temperature, with accurate and reliable working temperature, small volume and sealed structure.Advantage 1. Confidential alloy formula technology to ensure stable operation and high precision.2. Complete product quality management system to ensure high consistency and reliability.3.Plastic case, good in sulation, easy to instal4. Epoxy resin packag e, good product sealing.Working PrincipleWhen ambient temperature rises to its operatin g temperature, the fusible alloy will melt and sh rink into bulb on both sides of pin, with the help of surface tension and special resin, cut off the circuit permanentlyApplicationA-series products are widely used for overheati ng protection of all kinds of transformer coils, a s well as surge protection of various power supplies and plugs.Product CertificationA-series products meet the safety test requirements of IEC 60691 Ed 4.0 and GB/T 9816.1-2013, and many models are certified with UL, VDE, CCC, PSE, KC, TUV and other safety approvals.