Here is a used Amp-Trap time delay fuse, model ATQR4-1/2. The interrupt rating is 200kA at 600AC, and 100kA at 300VDC.

photo of the item

 (sold out)

List price is about $16.

Specifics:

  • brand: Amp-Trap
  • part number: ATQR4-1/2
  • country of origin: Mexico
  • Amperes: 4.5
  • Volt: 600
  • Length: 1.5"
  • Diameter: 13/32"

Condition: Used.