These ATC fuses illuminate when blown.easyIDTM illuminated ATC blade fuses use Light Emitting Diode (LED) technology to show when a fuse has blown. Easily locate blown fuses tucked up in dark compartments.Drop-in replacement for traditional ATO or ATC fusesFast actingAvailable in packages of two fusesSpecificationsAmperage Range: 3A-40AMaximum Operating Voltage: 32V DCInterrupting Capacity: 1000A @ 32V DCBlade Material: Tin-platedBlow Delay Curve