ASMDC125F/33-2 Circuit Protection

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PTC Resettable Fuses

PTC resettable fuses, also known as polymeric positive temperature coefficient (PPTC) fuses, are hybrid devices primarily used for circuit protection in electronics. They are designed to protect against overcurrent, and have become increasingly popular due to their ability to reset after a fault has occurred without manual intervention.

ASMDC125F/33-2 is a compact, resettable fuse that provides protection against short circuits, overcurrent, and ground fault interruptions. This product is widely used in communication, industrial, medical, automotive and consumer electronics applications. It is also applicable in dc and ac circuits where maximum current is up to 125A.

Application Fields and Working Principle

The ASMDC125F/33-2 is suitable in many consumer electronics, automotive, medical, and communications applications. It is useful in low-voltage dc and ac circuits, where current levels of up to 125A may be encountered. The ASMDC125F/33-2 can also be used for protecting dc battery banks and heavy-duty electrical circuits.

To reset the fuse after an overcurrent occurs, the device must be exposed to normal operating conditions for a specific amount of time. The device then dissolves the resistive element which provides the protection and reopens the fuse automatically. The fuse becomes operational again and eliminates manual intervention.

The working principle of ASMDC125F/33-2 is based on the resistance increase of the polymeric material used in the fuse when an overcurrent occurs. The resistance increase triggers a thermal response, further increasing the resistance and thus limiting the current to ensure protection. When the high-temperature response reduces, the fuse reactivates and drops back into a low-impedance state.

The ASMDC125F/33-2 has a number of advantages over traditional fuses, such as fast response time, automatic reset capability, wide operating temperature range, and wide current range. Additionally, it has low internal resistance and high-cycle life.

In conclusion, PTC resettable fuses like ASMDC125F/33-2 are becoming increasingly popular due to their ability to protect against overcurrent and reset after a fault has occurred without manual intervention. This product has a wide range of applications and features, such as fast response, automatic reset, wide temperature range, and low internal resistance. It is suitable for use in many consumer electronics, automotive, medical, and telecommunications applications.

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