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The Littelfuse 0452001.MRL is a surface-mount fuse designed to protect low-current electronic circuits from overcurrent conditions. Rated at 1 amp and suitable for both AC and DC circuits up to 125 V, it is commonly used in compact electronic assemblies where space is limited and reliable protection is required. This fuse is built for everyday electronics, not speciality or high-power systems. It does one job: safely interrupt the circuit when current exceeds its rating.
This is a T-rated (time-delay) fuse, meaning it can handle short current surges without opening immediately. That makes it suitable for circuits where brief inrush currents are common, such as power-input stages or devices that draw a momentary spike at startup.
It is often used as a first line of defence to prevent damage from overloads or short circuits.
For more information please check the datasheets.
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