
PTC RESET FUSE 265V 314MA RADIAL
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The YM120D370N100 is a positive temperature coefficient (PTC) resettable fuse designed for overcurrent protection in circuits operating up to 265V AC. It exhibits a nominal hold current (Ihold) of 314mA, indicating the maximum current the device can carry without tripping at a specified ambient temperature, typically 25°C. As a radial-leaded component, it is intended for through-hole mounting on printed circuit boards. Upon exceeding the trip current (Itrip), the PTC undergoes a rapid increase in resistance, limiting the fault current and protecting downstream components. The device resets to a low-resistance state once the overcurrent condition is removed and the device cools, allowing for continued circuit operation. The “120D370” portion of the part number likely refers to specific dimensional characteristics and trip current multiplier, requiring further datasheet verification for precise interpretation.