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Approvals & Standards

  • UL listed to standard 248-12
  • DC listed to UL standard 248
  • CSA certified to standard C22.2
No. 248.12

Key features & benefits

Solid-state SmartSpot indicator
Time-delay for motor starting and transformer inrush currents without nuisance opening
300kA interrupting rating, self-certified (UL witnessed test)
Extremely current-limiting for low peak let-thru current
Easy 2-to-1 selectivity for prevention of nuisance shut downs and "black outs"
Rejection-style design prevents replacement errors (when used with recommended fuse blocks)
High-visibility orange label gives instant recognition
Reduced inventory by taking the place of Class RK5, K, and H fuses
Metal embossed date and catalog number for easier traceability and lasting identification
Fiberglass body provides dimensional stability in harsh industrial settings
High-grade silica filler ensures fast arc quenching

More specifications


  • Motors
  • Safety switches
  • Transformers
  • Branch circuit protection
  • Disconnects
  • Control panels
  • All general-purpose circuits

Product Specifications

Item Number



Reducer Fuse A6D-R - Class RK1 - Time-Delay 600VAC 600VDC 225A Blade SmartSpot® Amp-Trap 2000®  

EAN/UPC code


Rated voltage AC UL

600   V

Rated voltage DC UL

600   V


50/60   Hz

Rated current

225   A

ROHS Compliant


Fuse class

Class RK1  


Time Delay  



AC Max I.R./Breaking Capacity: I1

200   kA

Indication System


Indication System Type


Contact materials

Tin-Plated Copper  

Connection/Terminal Type


Body/Insulating Material


Product Weight

2.6762   kg

Product Diameter

79.4   mm

Product Length

339.9   mm

Sell Pack Quantity

1   Each

Sell Pack Weight

2.8123   kg

Sell Pack Width

82.6   mm

Sell Pack Length

349.2   mm

Sell Pack Height

79.2   mm