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Application Note

General Applications

Almost anywhere there is a low-voltage power source and a load, a Multifuse® Resettable Fuse can be used. The fact that these protection devices reset automatically sets them apart among circuit protection devices. Circuit designers know there are circumstances they have no control over which can result in potentially damaging overcurrent conditions. Non-resettable fuses work well, once, and in many applications, replacement is not an option due to inconvenience, warranty costs or damaged reputations.

The benefits of Multifuse® Resettable Fuses are being recognized by more and more design engineers, and new applications are being discovered every day. The use of Multifuse® 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
  • Medical electronics
  • Personal care products
  • Point-of-sale equipment
  • Industrial controls
  • Automotive electronics and harness protection
  • Marine electronics
  • Battery-operated toys
Applications

Polymer Positive Temperature Coefficient (PPTC) Fuses have provided designers in numerous industries a new tool in their battle to improve product quality and performance while at the same time reducing total installed cost. As PPTC fuses are resettable, warranty costs and service calls are largely avoided. Since they do not need to be serviced, they can be utilized as embedded circuit protection devices. Based on PPTC technology, Multifuse® Resettable Fuses are packaged in Radial Leaded, Surface Mount, Axial Leaded "Battery Strap" and Uncoated Disk form and have a wide range of power ratings. With this comprehensive selection of packages and power ratings, there is sure to be a Multifuse® Resettable Fuse that meets your application requirements.

There are many applications for Multifuse® Resettable Fuses in a variety of market segments, including:

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