Semiconductor Protection Fuses

Square Body High-Speed Fuse-Links DC Protection

Protistor® size 72 gR 450 to 600VDC

These Protistor® fuse-links provide maximum flexibility in equipment design and ultimate protection for today's power conversion equipment. These square body fuse-links are available in different body sizes, each size having multiple worldwide acceptable mounting styles. The Protistor® have been engineered to provide state-of-the-art protection for semiconductors: diodes, thyristors, GTO's and IGBT devices. Fuses are assembled with pure silver, die-cut elements embedded in solidified sand, which helps control arcing characteristics for a lower I˛t and high interrupting rating level. All contact surfaces are silver plated and all hardware is non-magnetic. All fuse-links can be equipped with a low voltage trip-indicator which can operate a field mountable microswitch.



  • Multiple body sizes and terminals or blades combination
  • gR Class according to IEC 60269-4 and VDE 636-23
  • Low I˛t for improved semiconductor protection
  • Extremely fast acting
  • Eliminate all overloads
  • Excellent cycling capability


  • Voltage Range (VDC) 450 - 600 VDC
  • Ampere Range (A) 200 - 630 A
  • Speed / Characteristic gR
  • Body Style Square
  • Standards IEC 60269-4 Compliance
    UL/CSA Recognized E76491
    CCC GB 1359.4
  • Application Protection of inverters, motor drives, UPS systems and similar 600V or less equipments.
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Consult Technical Services


  • D72GB45V550EF - Q302694
  • D72GB45V550TF - A302818
  • D72GB45V630TF - Z302196
  • D72GB45V700TF - C1016602
  • D72GB55V450EF - B1003123
  • D72GB55V450TF - M302093
  • D72GB55V500TF - N302094
  • D72GB60V200EF - M302691
  • D72GB60V200TF - G302088
  • D72GB60V250EF - N302692
  • D72GB60V250TF - H302089
  • D72GB60V315TF - J302090
  • D72GB60V350EF - P302693
  • D72GB60V350TF - K302091
  • D72GB60V400EF - L1005363
  • D72GB60V400TF - L302092


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