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Approvals & Standards

  • IEC 60269-4 Compliance
  • UL/CSA Recognized E76491
  • CCC GB 13539.4 for Asian market only

Key features & benefits

The 1250/1300V Protistor® fuse-links provide maximum flexibility in equipment design and ultimate protection for today's power conversion equipment. These aR ultra-fast acting 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 I²t 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.

More specifications


  • Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.

Product Specifications

Item Number


Catalog number



Square Body High-Speed Fuse Protistor® Size 70 aR 1100VAC IEC 1200VAC UL 350A With Striker Flush ends UNC threads  

EAN/UPC code


Rated voltage AC UL

1200   V

Rated voltage AC IEC

1100   V

Rated current

350   A

AC or DC




Fuse size




Clearing I2t At Rated Voltage

180000   A²s

Melting I2t

27800   A²s

AC Max I.R./Breaking Capacity: I1

150   kA

Power Dissipation at Rated Current Value

68   W

Indication System


Indication System Type


Contact materials

Silver-Plated Brass  

Connection/Terminal Type

End Contact with Threaded Holes  

Body/Insulating Material


Product Weight

0.35   kg

Product Width

39.8   mm

Product Length

74   mm

Product Height

49.5   mm

Sell Pack Quantity

3   EA

Sell Pack Weight

1.05   kg

Sell Pack Width

85   mm

Sell Pack Length

135   mm

Sell Pack Height

550   mm