SRP120

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PTC Resettable fuses are a type of electrical circuit protection component that have become popular due to their low cost and relatively simple design. The SRP120 is an example of this type of component, and is most commonly used in consumer equipment, computer peripherals, audio and video equipment, and automotive systems. The SRP120 is also suitable for resettable remote power sources, providing mass production resettable protection.

In general, PTC Resettable fuses feature two main components: a PTC thermistor and a reset device. The PTC thermistor is a semi-conductor material that has a resistance that increases with increasing temperature. The reset device is a microswitch that can be triggered to reset the fuse after the initial current surge is detected. Upon reset, the thermal retention characteristics of the PTC thermistor ensure that the short circuit is permanently disconnected.

The SRP120 uses a type of PTC thermistor known as a polymeric positive temperature coefficient (PPTC) thermistor. When the pre-set temperature of the PTC thermistor is reached, the device will trip, breaking the circuit. Once the temperature has dropped below the pre-set point, the reset device will trigger, resetting the device and allowing current to flow once more. The SRP120 also features an over-current protection device, which will detect and disconnect the system in the event of excessive current. This ensures that the system is not damaged from excessive current.

The SRP120 can be purchased in a number of different configurations, depending on the application. It is available in single-pole and two-pole designs, different maximum current ratings, different reset and trip levels, and with different types of over-current protection. It is also available with different lead lengths and packages, making it suitable for a range of applications.

In automotive applications, the SRP120 is typically used to protect the electrical system from over-current and short circuits. The reset capabilities of the PTC thermistor mean that it can detect and disconnect the electrical system in the event of an over-current condition. This is beneficial for protecting sensitive components, such as airbags or vehicle systems, from damage due to electrical faults.

In consumer electronics and computer applications, the SRP120 can be used to protect delicate circuitry from current surges and overloads. It is also suitable for powering AC/DC adaptors for devices such as laptops and other electronic equipment. The reset capability of the SRP120 is beneficial for ensuring the safe flow of current in this type of application.

In conclusion, the SRP120 is a versatile and reliable PTC Resettable Fuse ideal for a range of applications. Its reset and over-current protection capabilities make it suitable for automotive, consumer electronics, and computer applications. It is easy to install, inexpensive to purchase, and offers reliable protection for sensitive circuits. Compared to traditional fuses, the SRP120 is a more reliable and cost-effective solution for circuit protection.

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