Pre-arcing time and post-arcing time are core performance parameters of high-speed fuses, widely used in semiconductor protection, new energy vehicles and energy storage circuit design.
Pre-arcing time refers to the time from the occurrence of overcurrent to the melting of the fuse element, which determines the initial response speed of the fuse. Post-arcing time is the time required to completely extinguish the electric arc after melting, directly affecting the breaking safety of high-current circuits.
The total I²t value is the sum of pre-arc I²t and post-arc I²t, which is the key basis for matching power electronic components such as IGBT. Different current multiples correspond to different standard breaking times.
According to IEC, GB and UL standards, aR semiconductor fuses focus on short-circuit rapid breaking, with strict requirements on arc extinguishing performance and I²t characteristic stability.
EssFuse full series high speed fuses have stable pre-arc and post-arc parameters, complete test data, and meet global mainstream certification standards.