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Approvals & Standards

  • IEC 60269-4 Compliance in AC and DC voltage
  • UL/CSA Recognized E76491 in AC and DC voltage
  • CCC GB 1539.4

Key features & benefits

The 690/760V Protistor® SC Series is a specific range to offer cost effective protection without concession on performance for
power conversion equipment. These fuses have been engineered to provide protection for all semiconductors: diodes, thyristors and
IGBT devices. They are assembled with bimetal silver and copper elements embedded in solidified sand, which helps control arcing
characteristics for a lower I²t and high interrupting rating level.
Contact surfaces are tin plated to get an optimized interface with the best quality/price ratio.
This SC Series has been conceived and specially optimized to match integrators’ and equipment manufaturers’ main requirements while
offering competitive prices.

More specifications


  • Protection of standard power conversion systems such as low voltage drives, UPS, inverter systems and similar
  • All AC standard networks (up to 690V) or DC standard networks

Product Specifications

Item Number


Catalog number



Size 31 type TTI with microswitch aR 315 A 690VAC  

EAN/UPC code


Rated voltage AC UL

760   V

Rated voltage DC UL

600   V

Rated voltage AC IEC

690   V

Rated current

315   A



Fuse size




Clearing I2t At Rated Voltage

47.5   kA²s

Melting I2t

7.54   kA²s

AC Max I.R./Breaking Capacity: I1

200   kA

Power Dissipation at Rated Current Value

72   W

Indication System


Indication System Type

Striker Microswitch  

Contact materials

Silver-Plated Brass  

Connection/Terminal Type

End Contact with Threaded Holes  

Body/Insulating Material


Product Weight

0.385   kg

Product Width

51   mm

Product Length

50.6   mm

Product Height

56.5   mm

Sell Pack Quantity

12   EACH

Sell Pack Weight

4.62   kg