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Approvals & Standards


  • UL Listed to standard 248-8
  • IEC 269-2-1


Key features & benefits

AJT Reducer Fuses are a safe permanent solution for decreasing your current rating without using a fuse reducer which are designed and list for temporary use only. These reducer fuses provide the same trusted protection levels as a traditional AJT fuses but in a larger body.

More specifications



  • Motor circuits
  • Mains
  • Feeders
  • Branch circuits
  • Lighting, heating & general loads
  • Transformers
  • Control panels
  • Circuit breaker back-up
  • Bus duct
  • Load centers


Product Specifications

Item Number


Item Description (ERP)

600V 300A CLASS J TD R6 FUSE  


Fuse Amp-Trap 600V 300A Time-Delay Class J AJT Reducer 600 Series Smart-Spot  

EAN/UPC code


Rated voltage AC UL

600   V

Rated voltage DC UL

500   V


50/60   Hz

Rated current

300   A

ROHS Compliant


Fuse class

Class J  


Time Delay  


Clip or Bolted  

AC Max I.R./Breaking Capacity: I1

200   kA

Contact materials


Connection/Terminal Type


Body/Insulating Material


Product Weight

1.4742   kg

Product Diameter

63.5   mm

Product Length

203.2   mm

Sell Pack Quantity

1   Each

Sell Pack Weight

1.5467   kg

Sell Pack Width

63.5   mm

Sell Pack Length

222.2   mm

Sell Pack Height

60.5   mm