FRN-R (250V) Bussmann Fusetron dual-element,time-delay fuse

Time-Delay: Dual-Element, Time-Delay - 10 seconds (minimum) at 500% rated current
Ampere Ratings: 1/10-600 Amps
Voltage Rating: 250 Volts AC (or less), 125 Volts DC
Current Limiting RK5 Fuse
Interrupting Rating: 200,000A RMS Sym. (20,000 AIC @ 125V DC).
Agency Approvals: UL Listed: Class RK5, Guide JDDZ,