Catalog Symbol: ECNR

Dual-Element, Time-Delay – 10 seconds (minimum) at 500% rated current (8 seconds for fuses 30A or less)

Current-Limiting
Volts: 250Vac (or less); 125Vdc (1-200A); 250Vdc (225-600A)
Amps: 1 to 600A
IR: 200kA RMS Sym.

Agency Information: CE, UL Listed, Std. 248-12, Class RK-5, Guide JDDZ, File E162363, CSA Certified, C22.2 No. 248.12, Class 1422-02, File 700489

Features
• Provides motor overload, ground fault and short-circuit protection.
• Helps protect motors against burnout from overloads.
• Helps protect motors against burnout from singlephasing on three-phase systems.(1-60A)
• Helps protect motors against burnout from overloads and single-phasing when sized properly.(70-600A)
• Simplifies and improves blackout prevention (selective coordination).
• Dual-element fuses can be applied in circuits subject to temporary motor overloads and surge currents to provide both high performance short-circuit and overload protection.
• The overload element provides protection against low level overcurrent of overloads and will hold an overload which is five times greater than the amp rating of the fuse for a minimum of ten seconds.

Dimensions (inches)



Catalog Numbers (amps)

ECNR1	ECNR9	ECNR35	ECNR90	ECNR250
ECNR2	ECNR10	ECNR40	ECNR100	ECNR300
ECNR3	ECNR12	ECNR45	ECNR110	ECNR350
ECNR4	ECNR15	ECNR50	ECNR125	ECNR400
ECNR5	ECNR17.5	ECNR60	ECNR150	ECNR450
ECNR6	ECNR20	ECNR70	ECNR175	ECNR500
ECNR7	ECNR25	ECNR75	ECNR200	ECNR600
ECNR8	ECNR30	ECNR80	ECNR225

Carton Quantity and Weight

Amps	Carton Quantity	Weight per Carton
		lbs	kg
1A - 15A	10	0.4	0.18
17.5A - 30A	10	0.5	0.23
35A - 60A	10	1	0.45
70A–100A	5	1.5	0.68
101A–200A	1	0.77	0.35
201A–400A	1	1.52	0.69
401A–600A	1	3	1.4

Class RK5 Fuse Blocks (250V) Catalog Data

Amps	Poles	Terminal Type (Suffix No.)
		Basic Catalog Number	Screw		Box Lug		1/4"
			-	w/ Pres.Plate	-	w/ Clip CU only	Quick Connect
1A - 30A	1	R25030-1	SR	PR	CR	COR	QR
	2	R25030-2					-
	3	R25030-3
31A - 60A	1	R25060-1	-	-	CR	-
	2	R25060-2
	3	R25060-3

Amps	Poles	Terminal Type (Suffix No.) Basic Box Lug w/
		Catalog Number	-	Reinforced Clip CU only
70A - 100A	1	R25100-1 CR COR	CR	COR
	2	R25100-2 CR COR
	3	R25100-3 CR COR
110A - 200A	1	R25200-1		-
225A - 400A		R25400-1
450A - 600A		R25600-1
110A - 200A	3	R25200-3
225A - 400A		R25400-3
450A - 600A		R25600-3

(Clip Retaining Spring Standard, Suffix “R”)


Current Limitation Curves



Time-Current Characteristic Curves–Average Melt




Fuse Reducers For Class R Fuses

Equipment Fuse Clips	Desired Fuse (Case) Size	Catalog Number (Pairs) 250V
60A	30A	No. 263-R
100A	30A	No. 213-R
	60A	No. 216-R
200A	60A	No. 226-R
200A	70-100A	No. 2621-R
400A	70-100A	No. 2641-R
	110-200A	No. 642-R
600A	70-100A	No. 2661-R
	110-200A	No. 2662-R
	225-400A	No. 2664-R*

*Single reducer only (pair not required).