What Is a SMD1206 PPTC Resettable Fuse?

The SMD1206 series PPTC resettable fuse adopts a surface-mounted shape structure, which helps to reduce the weight of the wire bundle and is distributed in circuits that support smaller wire diameters. You can install the protection device in an appropriately sized area without having to wrap the wiring harness back and forth around the fuse box. The solid-state content of PPTC devices helps ensure reliable operation.

SMD1206 PPTC Features

  • I(hold): 0.35A
  • Very high voltage surge capabilities
  • Available in lead-free version
  • Fast response to fault current
  • RoHS compliant, Lead- Free and Halogen-Free
  • Low resistance
  • Compact design saves board space
  • Compatible with high temperature solders

SMD1206 PPTC Applications

  • USB peripherals
  • Disk drives
  • CD-ROMs
  • General electronics
  • Set-top-box and HDMI
  • Mobile Internet Device (MID)
  • PDAs / digital cameras
  • Game console port protection
  • Plug and play protection for peripherals
  • Mobile phones - battery and port protection

SMD1206-035 Datasheet

SMD1206-035 PTC resettable fuse datasheet下载

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FAQs

1.What is a PPTC fuse?

A PPTC fuse is a resettable overcurrent protection device that increases its resistance when excessive current flows and automatically resets after the fault is removed.

2.How does it compare to traditional fuses?

Traditional fuses are single-use and must be replaced after tripping, while PPTC fuses reset automatically and require no maintenance—ideal for consumer and portable electronics.

3.How does a PPTC fuse work?

During overcurrent, the polymer material heats up and expands, sharply increasing resistance to limit current. After cooling, it returns to its low-resistance state, restoring normal operation.

4.What is the difference between PPTC and PTC?

PPTC is a polymer-based PTC device designed specifically for resettable overcurrent protection, while standard PTC components are typically used for temperature sensing or inrush current limiting.

5.What is the difference between NTC and PTC?

NTC resistance decreases as temperature rises (used for sensing and inrush limiting), while PTC resistance increases with temperature (used for protection or heating functions).