Time Delay Tri-onic Type TR 250 Volts A.C. Tri-onic Type TRS 600 Volts A.C. Ampere Ratings 1/10 - 600 Amps Interrupting Rating 200 ka RMS Sym. Certified to CSA Standard 248.12 Listed to UL Standard 248-12 Class RK5 Class RK5 fuses are rejection fuses used to give equipment Better protection in existing Class H & K5 fuse equipment