BK/S504-125MA

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Fuses are used in electrical or electronic devices to reduce damages due to excessive current, voltage, or heat by interrupting the circuit when it reaches dangerous levels. The BK/S504-125MA is an example of one such device. It is a time delay fuse which has a delay before tripping. This makes it suitable for protecting circuits from short-term overloads while allowing normal starting current.

Application Field

The BK/S504-125MA fuse is ideal for protecting motor circuits, including air conditioning and refrigeration units, pumps, conveyors, and vacuum cleaners. It is also suitable for reactive loads due to its inrush limiting and time delay characteristics. Additionally, the low arc voltage of this fuse reduces the possibility of damage due to arcing during fuse operation.

Working Principle

The BK/S504-125MA fuse is designed to allow brief overcurrents without interfering with regular operation. The fuse consists of a metal strip that is connected to two terminals at both ends. When the current flowing through the fuse is greater than the rated value, the strip will become hot due to resistance and eventually melt. This causes an interruption in the circuit and will protect the device from excessive currents.

The time-delay feature of the BK/S504-125MA fuse works by allowing a brief surge of current before the strip melts and trips the fuse. This helps to protect the device from overloads, while still allowing it to start up.

The BK/S504-125MA fuse is also designed to protect against short circuits. In a short circuit, the current through the device rises rapidly and overheats the fuse strip. The strip will melt, interrupting the circuit and preventing damage to the device due to the increased current.

Overall, the BK/S504-125MA fuse is an effective way of protecting circuits from short-term overloads, while providing enough current for starting. The time-delay feature prevents the device from tripping during normal operation, while the low arc voltage reduces the possibility of damage due to arcing.

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