Surface mounted type fuse

120 Amperes SFM Series Self Control Protector(SCP)

Replaceable package that can be mounted with screws. Suitable for power systems and high power equipment.

  • Product name
    SFM-12120 / SFM-14120 / SFM-20120 / SFM-30120 / SFM-40120 / SFM-50120
  • Features
    • Offers a rated current of 120 Amperes as a package that can be mounted with screws.
    • Applicable up to 14 cells in series.
    • 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.


Product name SFM-12120 SFM-14120 SFM-20120 SFM-30120 SFM-40120 SFM-50120
Applicable cells in series 3 cells 4 cells 5 cells 6 to 7 cells 8 to 11 cells 12 to 14 cells
Rated current (A) 120
Rated voltage (VDC) *
Rated breaking capacity (A) 300
Operating voltage (V) 8.2 to 13.5 10.8 to 18.0 14.2 to 23.5 18.9 to 31.5 29.7 to 49.5 37.7 to 62.0
Heater resistance (Ω) 1.0 to 1.6 1.8 to 2.7 3.0 to 4.7 5.5 to 8.3 13.6 to 20.5 22.0 to 33.0
Fuse resistance (mΩ) 0.5
Dimension (mm) 40.0 x 29.4 x 6.0
  • *Maximum voltage at which cutoff of the fuse is possible. It is not the operating voltage for the heater.
    UL certification: File No. E489967
    RoHS directive: Conforming

Suitable for Li-ion batteries of storage Batteries, electric 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.