●RESETTABLE CIRCUIT PROTECTION
●When it comes to Polymeric Positive Temperature Coefficient (PPTC) circuit protection, you now have a choice.
●Polymeric fuses are made from a conductive plastic formed into thin sheets, with electrodes attached to either side. The conductive plastic is manufactured from a non–conductive crystalline polymer and a highly conductive carbon balck. The electrodes ensure even distribution of power through the device, and provide a surface for leads to be attached or for custom mounting.
●The phenomenon that allows conductive plastic materials to be used for resettable overcurrent protection devices is that they exhibit a very large non–linear Positive Temperature Coefficient (PTC) effect when heated. PTC is a characteristic that many materials exhibit whereby resistance increases with temperature. What makes the polymeric conductive plastic material unique is the magnitude of its resistance increase. At a specific transition temperature, the increase is resistance is so great that it is typically expressed on a log scale.
●APPLICATIONS
●The benefits of polymeric Resettable Overcurrent Protectors are being recognized by more and more design engineers, and new applications are being discovered every day.
●The use of polymeric types of devices have been widely accepted in the following applications and industries:
●• Personal computers
●• Laptop computers
●• Personal digital assistants
●• Transformers
●• Small and medium electric motors
●• Audio equipment and speakers
●• Test and measurement equipment
●• Security and fire alarm systems
●• Personal care products
●• Point–of–sale equipment
●• Industrial controls
●• Automotive electronics and harness protection
●• Marine electronics
●• Battery–operated toys
