Bourns has added a new model to its Multifuse PPTC overcurrent protector family

     Bourns has announced the addition of a new model family to its leading Multifuse polymer Positive Temperature coefficient (PPTC) self-restoring fuse product line. The new Bourns Multifuse MF-MSHT model is high-temperature rated, automotive grade AEC-Q200 compliant, and available in a standard 1812 surface mount package. In addition, the MF-MSHT model series has A low thermal derating factor, with a maximum voltage range of 9 V - 42 V and a holding current range of 200 mA - 1.75A.

     The increasing electronic content in vehicles and industrial and consumer electronics based on industrial and consumer iot connectivity requires more robust overcurrent protection solutions to support higher ambient operating temperatures as well as reliable long-life performance. Bourns has designed its latest Multifuse MF-MSHT model family to provide effective overcurrent protection and reduce the risk of nasty trips at high temperatures of up to 125°C in these high-growth applications. These new high temperature PPTC ratings provide additional design flexibility, giving designers more options for overcurrent protection solutions that can help them best match their application specifications.

     "Designers for a variety of automotive grade applications will find the 125°C rating of the MF-MSHT family a reliable choice for overcurrent protection that meets their wide range of temperature requirements," said Lee Bourns, product line manager, Bourns Overcurrent Protection.

     The new polymer PTC model is made from a proprietary mixture of high melting point polymer materials and carbon-based conductive fillers to achieve highly reliable overcurrent protection, especially tailored for high-temperature environments. The proprietary conductive polymer formulation also improves resistance to common oils, lubricants and solvents that can adversely affect consumer grade PTCS frequently used in industrial and transportation applications.

     Bourns added: "The polymer we use in our high-temperature series is advantageous for demanding designs because it offers higher protection against solvent penetration. Solvents can cause resistance drift in many polymer resistance components, including PPTC. This increase in resistance can be reversed, resulting in unwanted trips from PPTC as less current is required to trip. Our high temperature resistant MF-MSHT model family helps system designers in some harsh environments solve this problem."