Secondary protection fuse

150A SFM Series

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

  • Product name
    SFM-12150 / SFM-14150 / SFM-20150 / SFM-30150 / SFM-40150 / SFM-50150
  • Features
    • Offers the rated voltage of 125 and rated current 150 A, the largest size in product lineup.
    • 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.
    • 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 SFM-12150 SFM-14150 SFM-20150 SFM-30150 SFM-40150 SFM-50150
Applicable cells in series 3 cell 4 cell 5 cell 6 to 7 cells 8 to 11 cells 12 to 14 cells
Rated current (A) 150
Rated voltage (VDC)*1 125
Rated breaking capacity (A) 400
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) 0.4
Dimension (mm)*2 40.0 x 29.4 x 18.0 (See below diagram)
  • *1 Maximum voltage at which cutoff of the fuse is possible. It is not the operating voltage for the heater.
  • *2 Values without tolerance indications are nominal values.
    UL certification: File No. E489967
    RoHS directive: Conforming

Application Example

Suitable for Li-ion batteries of storage Batteries, electric power-assisted bicycles, electric motorcycles, and other similar 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

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