PFMD.075.2

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PTC Resettable Fuses, often termed Polyfuses, are a type of self-regulating fuse developed as an alternative to traditional one-time-use fuses that utilizes a positive temperature coefficient thermistor to monitor and regulate current flow. One of the most common and widely used resettable fuse models within the Polyfuse family is the PFMD.075.2. Not only is the device competitively priced, but also can be incorporated into a variety of applications due to its\' adaptability. This article will focus on the applications and principle of operation of the PFMD.075.2.

The PFMD.075.2 is an ideal choice for overcurrent protection of sensitive electronic circuits, and because of its small package size and low profile, it can even be implemented into designs with limited space constraints. The fuse is suitable for applications that must operate within an ambient temperature of -45°C to 125°C, and it has an operating voltage range of 6V-36V DC. The device also has a high-leakage current specification of 1000A at 85°C, so it can handle brief surges of high current before tripping and shutting down the circuit.

Prior to powering a circuit, the device must be calibrated in order to set trip ranges. This entails shorting the PTC element and measuring the time needed for the device to reach trip temperature. Once this calibration is done, the PFMD.075.2 can also be configured in a variety of ways, such as parallel, series, and multiple branch configurations, allowing it to be used in a variety of applications.

The operating principle of the PFMD.075.2 is based on a Positive Temperature Coefficient (PTC) thermistor. A thermistor is a type of resistor whose resistance is dependent on temperature. As current flows through the PTC element, it starts to heat up until it reaches a specific temperature, known as its trip temperature, at which the PTC emits an open circuit between the two leads, thus preventing further current flow. When the temperature of the device has been reduced to a specific value, called its reset temperature, the internal resistance of the PTC is reduced, allowing current to flow again.

The PFMD.075.2 is capable of self-resetting after cooling down, and is a cost-effective and efficient solution for overcurrent protection applications. This device is ideal for use in portable electronic devices, medical systems, automotive systems, power supplies, and computer systems, where space or weight considerations preclude the use of traditional fuses. In addition, this particular Polyfuse model is UL approved, making it even more desirable in certain applications.

In conclusion, the PFMD.075.2 represents a valuable and efficient solution for overcurrent protection in a variety of applications. Its UL listing ensures that it meets the safety standards required for various consumer and industrial applications, and its wide operating temperature range and small size make it ideal for use in environments with limited space. Best of all, however, is that the device is self-resetting, making it a viable, cost-effective option for those looking for a simple, highly adaptable solution.

The specific data is subject to PDF, and the above content is for reference