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Approvals & Standards

  • IEC 60269-4 Compliance
  • UL/CSA Recognized E76491
  • CCC 1359.4

Key features & benefits

The 690/700V 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 and IGBT devices. Fuses are assembled with 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.
Each fuse-link 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


Item Description (ERP)

5,5 URD 33 TT F 2000  


PROTISTOR® SB aR, metric threaded holes, TTF, sz.33, 550VAC IEC, 2000A  

EAN/UPC code


Rated voltage AC UL

600   V

Rated voltage AC IEC

550   V

Rated current

2000   A



Fuse size




Clearing I2t At Rated Voltage

4500   kA²s

Melting I2t

950   kA²s

AC Max I.R./Breaking Capacity: I1

200   kA

Power Dissipation at Rated Current Value

250   W

Design Details

Reinforced Terminal  

Indication System


Indication System Type


Contact materials

Silver-Plated Brass  

Connection/Terminal Type

End Contact with Threaded Holes  

Body/Insulating Material


Product Weight

0.8056   kg

Product Width

73   mm

Product Length

50.6   mm

Product Height

78.5   mm

Sell Pack Quantity

3   EACH

Sell Pack Weight

2.4168   kg

Sell Pack Width

85   mm

Sell Pack Length

245   mm

Sell Pack Height

95   mm