LLNRK-50 Powr-Pro LITTELFUSE DUAL-ELEMENT TIME-DELAY 50Amp - USED - History: mounted but not energized.
Price is for 1 each.

Class RK1
Dual-Element, Time-Delay
Voltage Rating: 250 Vac (or less)
Current Limiting
Interrupting Rating: 200,000A I.R., 300,000A I.R. (Self-certified)

Littelfuse LLNRK POWR-PRO fuses provide superior overload and short-circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes.

Applications:
Fluorescent lighting
All system components with high in-rush currents
Motors
Transformers
Solenoids
General purpose circuits