B59002A1220B010

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PTC resettable fuses can be found in almost any consumer electronics, from laptops and mobile phones, to appliances and home entertainment equipment. This type of fuse is also commonly known as a polyfuse, polyswitch, or resettable fuse. They are typically used for over-current protection circuits, where a current increases above a certain threshold, and needs to be managed or cut off. PTC fuses can handle both low & high current surges and are used as a fail-safe protection in many kinds of electronics. The B59002A1220B010 is one such PTC fuse that offers high current protection even in harsh environmental conditions.

The B59002A1220B010 PTC resettable fuse is an extremely useful and versatile device as it can handle both low and high current protection needs. Its maximum continuous current and nominal current are 12A and 20A respectively. The device comes with a broad operating temperature range of -55C to 125C. It also supports a voltage range of 6.5 to 28V. This makes it an ideal choice for use in high temperature applications, as well as in automotive and transportation systems.

This device has added feature of self-resetting. This means that when the current exceeds its threshold (20A in this case), it trips that open and cuts off current supply; this action is indicated by a rapid increase in temperature. Once the temperature drops, the device automatically resumes operation. This feature allows the device to be used in multiple current applications, since it will self-reset after each surge.

In terms of its working principle, the PTC device has two primary components: a conductive element and a semi-conductive element. The combination of these two elements creates a junction between the two elements. The current passes from the conductive element to the semi-conductive element and vice versa depending on the current flow in either direction. The current flow through the device causes an increase in temperature and increases the resistivity of the semi-conductive element on the device. Ultimately, this creates an open circuit, thus tripping the device and cutting off the current flow. Once temperatures reduce, the resistivity of the semi-conductive element decreases, and the device carries current again to allow it to start functioning again.

The B59002A1220B010 PTC fuse finds application in systems where current needs to be protected. These include automotive, industrial, and power electronics applications. Automotive applications include circuit protection in engine starters, alternators, and heated seat systems. The device can also be found in battery power systems, such as traditional lead-acid battery chargers and lithium ion batteries, where it offers over-current protection to the batteries from overcharge or excessive power draw. It also finds application in renewable energy systems for over-voltage, short-circuit and overload protection.

The B59002A1220B010 PTC resettable fuse offers excellent protection circuit for both low and high continuous current operations. Its self-reset capability is a great feature that allows the device to reset itself after extreme current overloads. Furthermore, its broad operating temperature range and its compatibility with both traditional lead-acid and lithium-ion batteries make it a great choice for many electronic applications. The working principle of the device involves a combination of conductive and semi-conductive elements, which when triggered by a current flow, creates an open circuit to cut off current flow and reset the device once temperatures subside.

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