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Shanghai Songshan Electronics Co., Ltd.

PTC Resettable Fuse 1 AMP, PPTC Resettable Fuse 2 AMP, PTC Resettable Fuse 3 AMP manufacturer / supplier in China, offering PPTC Resettable Surface Mount Fuse, Battery Strap Resettable PPTC 6V, Surface Mounted Devices 1206f Fuse and so on.

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PPTC Resettable Surface Mount Fuse

FOB Price: Get Latest Price
Min. Order: 1,000 Pieces
Port: Shanghai, China
Transport Package: Carton
Payment Terms: T/T, Western Union, Paypal

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Basic Info
  • Model NO.: LP-SM
  • Type: Resettable Fuse
  • Shape: SMD
  • Fusing Device: Pop-up Solid
  • Origin: Shanghai, China
  • Breaking Capacity: Low
  • Usaga: Low Voltage
  • Fusing Speed: F
  • Trademark: songshan
  • HS Code: 85361000
Product Description
LP-SM is a resettable fuse, which is a kind of electronic over current protection component. Like its name, the fuse can be used repeatedly in circuit. The fuse adopts high-molecular organic polymer at a high temperature and high pressure condition and the conductive particle material is added, then the fuse is made through a special process. The fuse can be automatically restored to continue to play a role in protection of circuit after it fuses in the circuit and thus the fuse plays an important role the general fuse cannot play. The right specification of the fuse depends on conditions of use.

  • Customized size and electrical characteristic available
  • Surface mount packaging for automated assembly
  • Fast tripping resettable circuit protection 
Polymer PTC Re-settable Fuse Series           
  • Customized size and electrical characteristic available
  • Surface mount packaging for automated assembly
  • Radial-leaded devices for wave-soldering or manually assembly
  • Fast tripping resettable circuit protection
Product Dimensions for Surface-mounted Devices                                                 
Unit: mm
PPTC Resettable Surface Mount Fuse    PPTC Resettable Surface Mount Fuse
Part number


ABCDEFigures for
Max.Max.Max.Min.Min. Dimension


Thermal Derating Chart-IH(A)                                          

Part number
Hold current
Electrical Characteristics at 25ºC                                      
Part number
IHITVmaxImaxMax. Time-to-tripPd typRminR1maxFigures for
IH=Hold current: maximum current at which the device will not trip at 25ºC still air.
IT=Trip current: minimum current at which the device will always trip at 25ºC still air.
Vmax=Maximum voltage device can withstand without damage at rated current.
Imax=Maximum fault current device can withstand without damage at rated voltage.
Ttrip=Maximum time to trip at assigned current.
Pdtyp=Typical power dissipation: typical amount of power dissipated by the device when in state air environment.
Rmin=Minimum device resistance at 25ºC prior to tripping.
R1max=Maximum device resistance measured after 1 hour post one-time trip.

Part Numbering System                                                       

Product series
Hold Current
Other necessary information

Test Procedures And Requirements                                                 
TestTest ConditionsAccept/Reject Criteria
ResistanceIn still air @ 25ºCRminRRmax
Time to TripSpecified current, Vmax, 25ºCTmaximum Time to Trip
Hold Current30min, at IHNo trip
Trip Cycle LifeVmax, Imax, 100cyclesNo arcing or burning
Trip EnduranceVmax, 24hoursNo arcing or burning
Application Requirements                                                            
Soldering recommendation:
* Methods: IR, Vapor phase oven, hot air oven, wave solder, soldering temperature should not exceed GB-T2423 request.
* Devices can be cleaned using standard industry methods and solvents.
If reflow temperatures exceed the recommended profile, devices may not meet the performance requirements.
The maximum ambient temperature shall not exceed 40ºC. Storage temperatures higher than 40ºC could result in the deformation of packaging materials. The maximum relative humidity recommended for storage is 70%. High humidity with high temperature can accelerate the oxidation of the solder plating on the termination and reduce the solderability of the components. Sealed plastic bags with desiccant shall be used to reduce the oxidation of the termination and shall only be opened prior to use. The products shall not be stored in areas where harmful gases containing sulfur or chlorine are present.
PPTC devices are intended for protection against occasional over-current or over-temperature fault conditions, and should not be used when repeated fault conditions are anticipated. Operation beyond maximum ratings or improper use may result in device damage and possible electrical arcing and flame.
The specification is intended to present application, product and technical data to assist the user in selecting PPTC circuit production devices. However, users should independently evaluate and test the suitability of each product. Wayon makes no warranties as to the accuracy or completeness of the information and disclaims any liability resulting from its use. Wayon's only obligations are those in the Wayon Standard Terms and Conditions of Sale and in no case will Wayon be liable for any incidental, indirect, or consequential damages arising from the sale, resale, or misuse of its products. Wayon reserves the right to change or update, without notice, any information contained in this specification.
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