Surface mounted type fuse

22 Amperes(small) SFJ Series Self Control Protector(SCP)

Suitable for compact, slimline mobile devices with a large rated currents.

  • Product name
    SFJ-0422 / SFJ-0822 / SFJ-1222 / SFJ-1422 / SFJ-2022
  • Features
    • Achieving rated current 22 Amperes as a surface mounted fuses.
    • 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.
    • This is a Pb-free* product.
      * The European RoHS Directive, which restricts the use of hazardous substances, defines Pb-free as a Pb content of 1,000 ppm or less.


Product name SFJ-0422 SFJ-0822 SFJ-1222 SFJ-1422 SFJ-2022
Applicable cells in series 1 cell 2 cells 3 cells 4 cells 5 cells
Rated current (A) 22
Rated voltage (VDC)* /
Rated breaking capacity (A)
62/80 (UL/TUV)
48/200, 25/300 (UL)
Operating voltage (V) 3.50 to 4.70 6.00 to 9.20 9.00 to 13.80 12.00 to 18.50 15.90 to 23.10
Heater resistance (Ω) 0.68 to 1.00 2.29 to 3.30 5.30 to 7.50 9.75 to 13.25 16.10 to 23.10
Fuse resistance (mΩ) 0.9
Dimension (mm) 4.0 x 3.0 x 0.85
  • * 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

<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.

Suitable for Li-ion battery pack for smartphones, notebook PCs, cordless power tools, storage batteries, power-assisted bicycles, electric motorcycles, electric cars, and other similar battery powered devices.


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.