Bussmann Time delay fuse is enclosed in a transparent glass tube and has nickel-plated brass end cap for better conductivity. Fuse is rated at 250 VAC/1 Amp. It has interrupting current rating of 35 Amps at 250 Volts and 10 kilo-Amps at 125 Volts that helps for safer operation of electrical devices. Fuse has voltage drop rating of 0.995 Volt and DC cold resistance of 0.525 Ohm. It has maximum time delay of 60 minutes at 135% at the current rating, perfect for device that draws large current above rated value such as motor. It is designed to protect electronic equipment from overload voltage and short circuit. It measures 0.250 Inch x 1.250 Inch. Fuse is UL listed and CSA certified.