MICROSMD190LR-2

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PTC (positive temperature coefficient) resettable fuses are becoming increasingly popular in the realm of electrical circuit protection. The MICROSMD190LR-2 is a small, radial leaded surface-mountable fuse designed with polymeric Positive Temperature Coefficient (PPTC) devices to provide resettable overcurrent and short-circuit protection. Its compact size and solid construction enable it to be used in a variety of electronics applications.

The primary application field for the MICROSMD190LR-2 is in consumer electronics, specifically for laptop computer chargers, USB power supply devices, and consumer and professional audio/video equipment. Its low profile design allows for a more efficient use of space, and its high current rating makes it an attractive component for a variety of devices.

The MICROSMD190LR-2 features three products in its series: an ultra-low-resistance (ULR) version, a low-level (LL) version, and a high-current (HC) version. Each type offers different current ratings to suit the needs of various applications. The ULR model provides fast response to short-circuit events and offers current ratings of 1A, 2A, 4A, and 8A. The LL model offers current ratings of 5A, 6A, and 10A, while the HC model has maximum current ratings of 15A, 20A, and 30A.

The working principle of the PTC resettable fuse is simple, but effective. In the event of an overload or short circuit, an increase in temperature triggers the fuse, which then opens to isolate the circuit. Once the temperature cools, the fuse resets itself and the circuit is re-energized. This eliminates the need to manually reset the fuse after an overcurrent or short circuit event.

The MICROSMD190LR-2 uses a combination of temperature sensitive polymeric PTCs and fusible resistors to provide a low response time, high current ratings, and short circuit protection. The device features an operating temperature range of -50-150°C, is available in various lead styles to fit a variety of applications, and is RoHS compliant. This combination of features makes it an ideal choice for a variety of consumer electronics and other applications.

In conclusion, the MICROSMD190LR-2 PTC resettable fuse is an effective, reliable protection solution for a wide range of consumer electronics applications. Its low profile design, high current ratings, fast resetting, and RoHS compliance make it an attractive option for a multitude of devices. Its ability to quickly respond to short-circuit events and reset without manual intervention allows it to provide superior protection from hazardous overloads and short circuits.

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