ECNR20 DUAL ELEMENT FUSE – 250 VOLTS, 20 AMPS PROVIDES TIME DELAY FOR TEMPORARY OVER CURRENT CONDITIONS AND MOTOR RUNNING PROTECTION FOR HEATING AND AIR CONDITIONING EQUIPMENT. ELIMINATES UNNECESSARY MAINTENANCE FROM HARMLESS OVERLOADS. U.L. CLASS RK 5, STANDARD FOR SAFETY 198E, CURRENT LIMITING FUSES, INTERRUPTING RATING 200,000 AMPS. RMS. A.C.