1
BULLET
™
CLASS RK5
DUAL ELEMENT TIME-DELAY FUSES
AMPERE RATINGS
ECNR 250V
0.1 1.12 3.2 10 60 225
0.12 1.25 3.5 12 70 250
0.15 1.4 4 15 75 300
0.2 1.5 4.5 17.5 80 350
0.25 1.6 5 20 90 400
0.3 1.8 5.6 25 100 450
0.4 2 6 30 110 500
0.5 2.25 6.25 35 125 600
0.6 2.5 7 40 150 —
0.8 2.8 8 45 175 —
1 3 9 50 200 —
ECSR 600V
0.1 1.25 3.5 12 70 250
0.15 1.4 4 15 75 300
0.2 1.5 4.5 17.5 80 350
0.25 1.6 5 20 90 400
0.3 1.8 5.6 25 100 450
0.4 2 6 30 110 500
0.5 2.25 6.25 35 125 600
0.6 2.5 7 40 150 —
0.8 2.8 8 45 175 —
1 3 9 50 200 —
1.12 3.2 10 60 225 —
ECNR/ECSR SPECIFICATIONS
Dual-Element Time-Delay
Voltage Rating: ECNR - 250VAC, ECSR - 600VAC
Ampere Rating: .1 - 600 Amps
Interrupting Rating: 200,000 RMS Symmetrical Amps
Current Limiting: RK5 Fuse
Agency Approvals:
UL Listed, Class RK5, Guide JDDZ, File E162363
CSA Certified HRCI-R per C22.2, No. 248.12
Self-Certified DC Ratings:
Voltage Rating: ECNR (.1-600) 125VDC
ECSR (.1-600) 300VDC
Interrupting Rating: ECNR/ECSR 20,000 Amperes DC
RECOMMENDED FUSEBLOCKS:
Refer to page 136 in this catalog.
RECOMMENDED UPGRADE:
Class RK1 (LENRK/LESRK) for greater degree of short cir-
cuit protection.
Catalog Number ECNR (.1 - 600A) 250 Volts AC or Less
Catalog Number ECSR (.1 - 600A) 600 Volts AC or Less
CROSS REFERENCE
VOLTS EDISON BUSSMANN GOULD LITTELFUSE
250 ECNR FRN-R TR FLNR
600 ECSR FRS-R TRS FLSR
BENEFITS:
• True dual - element construction allows sizing of 125%
FLA for motor backup protection.
• Superior overload and cycling capabilities.
• Current limiting; provides component short-circuit protec-
tion.
APPLICATIONS:
• Recommended for AC power distribution system mains,
feeders, and branch circuits.
• Protection of motors and motor branch circuits.
• Protection of transformers and other inductive loads.
• All general - purpose applications including lighting, heat-
ing and other non-inductive loads.
