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A resettable fuse (also known as a PTC) is a resistor that has very unique properties, it resistances increases with heat (more current).
For this model, if your circuit tries to draw more than 2.5A of current or if you have a bad short, the PTC would ‘trip’ (by heating up). The increased resistance (trip state) would break the circuit and allow only a small leakage current.
The leakage current may still be enough to hurt some electronics but it’s much less than the huge current that the short may have allowed. Removing the short, the PTC ‘resets’ and allows current up to 2.5A to flow again. It’s a resettable fuse that protects your system! Good for use on battery powered devices that need to protect again high-current accidental discharges.
|Package||Through Hole P=5.1mm|
|Brand Category||Authorized Brands|
|Voltage – Max||30V|
|Current – Max||40A|
|Current – Hold (Ih)||2.5A|
|Current – Trip (It)||5A|
|Maximum Time to Trip||10.3s|
|Typical Power Dissipation||1.2W|
|Resistance – Initial (Ri) (Min)||–|
|Resistance – Post Trip (R1) (Max)||–|
|Operating Temperature||-40°C ~ 85°C|