Semiconductor Protection Fuses

Square Body High-Speed Fuse-Links DC Protection

Protistor® size 70 aR 1200VDC (IEC)

Mersen DC offers provide a very high performant protection for railway power and auxiliary circuits. Mersen DC Semiconductor fuse-links were developed to provide improved performance required by today's new DC equipment. These fuse-links are typically operated at more elevated temperature than other fuse type, have lower I²t to minimize damage to protected components on short circuits, lower watts loss and longer life.



  • Low I²t for improved semiconductor protection
  • Extremely fast acting
  • Excellent cycling capability
  • Very low I²t
  • Worldwide acceptability


  • Ampere Range (A) 20 - 215 A
  • Standards IEC 60269-4 Compliance
    UL 248-1 Recognized
  • Application Protection of inverters
    Protection of motor drives
    Protection of UPS systems
    Protection of similar 1200V or less equipments
    Railway power and auxiliary circuits
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Consult Technical Services


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