Secondary protection fuse

30A (Small) SFS Series

Achieving ultra-low resistance, a low height. Suitable for devices that support fast charging.

  • Product name
    SFS-0430A / SFS-0830A / SFS-1230A / SFS-1430A
  • Features
    • Achieving rated current 30 Amperes and Pb-free as a surface mounted fuse.
    • Protects Li-ion batteries from overcharging (overvoltage) and overcurrent.
    • When overcharging occurs, the fuse element melts to shut off the circuit, and simultaneously the power to the heater is also cut off.
    • Placing a heater directly under the fuse element breaks the circuit quickly.
    • Achieving low resistance (0.55mΩ) and a low height (0.9mm).
    • Changing some of its constituent materials has caused an entirely lead-free product*to be realized.
      * The European RoHS Directive, which restricts the use of hazardous substances, defines Pb-free as a Pb content of 1,000 ppm or less.

Specifications

Product name SFS-0430A SFS-0830A SFS-1230A SFS-1430A
Applicable cells in series 1 cell 2 cells 3 cells 4 cells
Rated current (A) 30
Rated voltage (VDC)*1 36
Rated breaking capacity (A) 80
Operating voltage (V) 3.8 to 5.0 8.1 to 9.6 11.4 to 15.0 14.4 to 19.6
Heater resistance (Ω) 0.50 to 0.80 2.97 to 4.37 5.62 to 8.67 9.6 – 13.8
Fuse resistance (mΩ) 0.55
Dimension (mm)*2 5.4 x 3.2 x 0.9 (See below diagram)
  • *1 Maximum voltage at which cutoff of the fuse is possible. It is not the operating voltage for the heater.
    UL certification: File No. E167588
    TUV certification: Certificate No. J9650637
    RoHS directive: Conforming
  • *2 Values without tolerance indications are nominal values.

<Recommended land size>

  • These are recommended sizes and we can't guarantee the quality of product when mounted.
    We recommend our customer to verify if our products could work with your design guidelines.

Application Example

Suitable for Li-ion batteries of smartphones, cordless power tools, cordless vacuum cleaners, storage batteries, and other battery powered devices.

caution

Note on the characteristic data given - Data on the characteristics of the products described in this page based on the results of evaluations carried out by the company. This does not guarantee that the characteristics of the product conform with your usage environment. Before use, review the usage conditions based on evaluation data obtained from the equipment and substrates actually used.

Product information

Optical Semiconductor

Frequently Asked 
Questions

About Our
Products