MICROSMD075-2

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PTC Resettable Fuses are a type of electrical fuse used for electrical circuit protection. It is a polymeric positive temperature coefficient (PPTC) device, or polyswitch, that acts as a protective circuit breaker in circuit designs that require over-current protection. The MICROSMD075-2 is a specific type of this popular protection device. This article will discuss the application field and working principle of the MICROSMD075-2.

The MICROSMD075-2 is a polymeric PTC resettable fuse manufactured by Microsemi Corporation. It is rated with a breakdown voltage of 6.0 volts and its current rating ranges from 10mA to 750mA. This makes it ideal for portable applications as it is designed to protect against current and voltage transients. Additionally, it can also provide protection against over current, overvoltage, reverse voltage, ESD, short circuit, lightning transients, and over-temperature conditions. The MICROSMD075-2 can be used in a variety of applications including battery protection in consumer electronics, power supplies, telecommunication equipment, and other ac/dc and dc/dc applications.

The MICROSMD075-2 has several advantages compared to traditional devices. Firstly, it provides protection without creating an open circuit. Additionally, it can be reset with a momentary over current condition, preventing the device from being permanently damaged. Compared to single-use fuses, it is very cost effective as it can be reset and reused multiple times. Furthermore, due to its small size, it lends itself to use in space constrained applications such as medical, home appliances, and consumer electronics.

The MICROSMD075-2 works by activating its built-in PTC element when its current limit is exceeded. When the state is active, the device will either shunt the excess current or switch to high resistance, creating an open circuit. This prevents further damage and protects the load circuit from over current. Additionally, the device is designed to reset itself automatically after the current condition has returned to normal, allowing it to operate again.

In summary, the MICROSMD075-2 is a versatile and cost-effective PTC resettable fuse designed to provide protection against over current, overvoltage, reverse voltage, ESD, short circuit, lightning transients, and over-temperature conditions. Its small form factor lends itself to use in a variety of portable applications. This device works by activating its PTC element when its current limit is exceeded, and then resetting itself automatically when the current has returned to normal.

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