MersenAJT Amp-Trap 2000 SmartSpot Time-Delay/Class J Fuse with Maximum Circuit Protection, 600VAC/500VDC, 200kA AC/100kA DC, 30 Ampere, 13/16" Diameter x 2-1/4" Length

Worked great, got my heat pump back up and running. Really appreciate the quick look indicator. My last set didn't have this feature and I was troubleshooting my heat pump for 30 minutes before I thought to run a continuity check on the fuse.