CLASS RK5 AND RK1 DUAL
ELEMENT TIME-DELAY FUSES
Starts at
$
30
Pkg of 5
ECNR5-10PK,
$37, pkg
of 10
ECNR40-10PK,
$55, pkg of 10
l True Dual - Element Spring -
Trigger Construction Allows
Sizing of 125% FLA for Motor
Backup Protection
l Superior Overload and
Cycling Capabilities
l Extremely Current Limiting;
Provides Superior Short Circuit
Component Protection
RK5 Dual Element
Time-Delay Fuses
These fuses are recommended for AC power
distribution system mains, feeders and
branch circuits having inductive loads
(motors, transformers) or non-inductive
loads (lighting, heating) where the available
short-circuit current does not exceed
200,000 RMS symmetrical amperes.
These “dual element, time-delay” fuses have
minimum industry standard time-delay of
10 seconds at 5 times the fuse rating (8 s
minimum for 250V, 30 A and less). The timedelay
characteristics of these fuses typically
allows them to be sized closer to the running
ampacity of inductive loads to reduce cost
and provide improved overcurrent
protection. These fuses will override normal
equipment current surges to reduce
unnecessary fuse openings. They are the
ECNR70-5PK,
$61, pkg of 5
ECSR30-10PK,
$66, pkg of 10
ECNR150,
$27, pkg of 1
ECSR60-10PK,
$113, pkg of 10
most popular fuses used in the industry and
the most economical for most applications,
especially motors and transformers. They
have moderate current limitation.
CLASS R FUSES WILL FIT CLASS H, K AND
R FUSE CLIPS. CLASS R FUSE CLIPS WILL
ONLY ACCEPT CLASS R FUSES. FUSES
RATED 600 VOLTS AC OR LESS MAY BE
APPLIED AT ANY LOWER VOLTAGE.
RK1 Dual Element
Time-Delay Fuses
The application recommended for these
fuses is exactly the same as for the Edison
ECNR/ECSR fuses except for the advantages
of greater current limitation. The Edison
LENRK/LESRK fuses have up to 40% more
current limitation and up to 350% more
Amps-Squared-Second (I2t) limitation under
fault conditions than Edison ECNR/ECSR
fuses to reduce potential for damage. In
addition, LENRK/LESRK fuses allow better
selectivity for electrical power system
designers and better short circuit protection
for breakers having inadequate interrupting
ratings. ECNR/ECSR and LENRK/LESRK fuse
lines are physically interchangeable (and
electrically interchangeable per U.L.
M-13
All models shown
smaller than actual size.
ECSR100-5PK,
$117, pkg of 5
ECSR200,
$47, pkg of 1
equipment listing conditions) and are
recommended as a practical, economical
way to upgrade systems for many situations.
SPECIFICATIONS
Voltage Rating:
ECNR and LENRK: 250 Vac
ECSR and LESRK: 600 Vac
Ampere Rating:
ECNR and ECSR: 0.1 to 600 A
LENRK and LESRK: 0.2 to 600 A
Interrupting Rating: 200,000 RMS
symmetrical amps
LENRK and LESRK Self-Certified
Interrupting Rating: 300,000 RMS
symmetrical amps
Current Limiting:
ECNR and ECSR: RK5 fuse
LENRK and LESRK: RK1 fuse
Agency Approvals: UL Listed, Class
RK5 and RK1, Guide JDDZ, File
E162363; CSA Certified HRCI-R per
C22.2, No. 248.12
Self-Certified DC Ratings:
Voltage Rating: ECNR (0.1 to 600)
125 Vdc; ECSR (0.1 to 600) 300 Vdc;
LENRK (0.2 to 600) 125 Vdc; LESRK
(0.25 to 30) 200 Vdc; (35 to 600)
300 Vdc
Interrupting Rating:
ECNR and ECSR: 20,000 amperes DC
LENRK and LESRK: 20,000 amperes DC
Dimensions: in, see dimensions chart below.
LESRK30-10PK,
$117, pkg of 10
A
Ferrule design — 0 through 60 amperes Knife blade — 70 through 200 amperes
All models
shown smaller
than actual size.
LENRK10-10PK,
$67, pkg of 10
B
To Order (Specify Model Number)
A
MOST POPULAR MODELS HIGHLIGHTED!
MODEL PKG AMP MODEL PKG AMP
LENRK60-10PK,
$99, pkg of 10
NO. PRICE SIZE RATING NO. PRICE SIZE RATING
ECNR1-10PK $42.50 10 1 ECSR3-10PK $75.00 10 3
ECNR2-10PK 40.50 10 2 ECSR4-10PK 75.00 10 4
ECNR3-10PK 39.00 10 3 ECSR5-10PK 75.00 10 5
ECNR5-10PK 37.00 10 5 ECSR6-10PK 75.00 10 6
LESRK60-10PK,
$200, pkg of 10
ECNR8-10PK 39.00 10 8
ECNR10-10PK 37.00 10 10 ECSR7-10PK 79.00 10 7
ECSR6.25-10PK
ECNR15-10PK 30.00 10 15 ECSR8-10PK 75.00 10 8
ECNR20-10PK 30.00 10 20 ECSR10-10PK 75.00 10 10
ECNR25-10PK 30.00 10 25 ECSR12-10PK 75.00 10 12
ECNR30-10PK 30.00 10 30 ECSR15-10PK 66.00 10 15
ECNR35-10PK 55.00 10 35
ECSR17.5-10PK
ECNR40-10PK 55.00 10 40 ECSR20-10PK 66.00 10 20
ECNR45-10PK 55.00 10 45 ECSR25-10PK 66.00 10 25
ECNR50-10PK 55.00 10 50 ECSR30-10PK 66.00 10 30
ECNR60-10PK 55.00 10 60 ECSR35-10PK 113.00 10 35
ECNR70-5PK 61.00 5 70 ECSR40-10PK 113.00 10 40
ECNR80-5PK 61.00 5 80 ECSR45-10PK 113.00 10 45
ECNR90-5PK 64.00 5 90 ECSR50-10PK 113.00 10 50
ECNR100-5PK 61.00 5 100 ECSR60-10PK 113.00 10 60
ECNR150 27.00 1 150 ECSR70-5PK 234.00 5 70
ECNR200 27.00 1 200 ECSR80-5PK 117.00 5 80
ECSR90-5PK 117.00 5 90
ECSR100-5PK 100.00 5 100
LESRK100-5PK,
$206, pkg of 5
Dimensions: in
OVERALL MAX
MODEL NO./ LENGTH DIA.
AMPS AB
ECNR AND LENRK 250V
0 to 30 2 0.56
35 to 60 3 0.81
70 to 100 5.88 1.06
110 to 200 7.13 1.56
ECSR AND LESRK 600V
0 to 30 5 0.81
35 to 60 5.5 1.06
70 to 100 7.88 1.11
110 to 200 9.63 1.61
MODEL PKG AMP MODEL PKG AMP
NO. PRICE SIZE RATING NO. PRICE SIZE RATING
LENRK10-10PK
LENRK15-10PK
LENRK20-10PK
LENRK30-10PK
LENRK60-10PK
LENRK100-5PK
Ordering Examples: ECNR1-10PK, 1 amp
fuse, package of 10, $42.50.
LENRK10-10PK, 10 amp fuse, package of
10, $67
$67 10 10
54 10 15
54 10 20
54 10 30
99 10 60
112 5 100
ECSR125 47.00 1 125
ECSR150 47.00 1 150
ECSR200 47.00 1 200
LESRK5-10PK
LESRK10-10PK
LESRK15-10PK
LESRK20-10PK
LESRK25-10PK
LESRK30-10PK
LESRK40-10PK
LESRK50-10PK
LESRK60-10PK
LESRK100-5PK
LESRK200
M-14
B
LESRK200,
$83, pkg of 1
79.00 10 6.25
66.00 10 17.5
$131 10 5
131 10 10
117 10 15
117 10 20
117 10 25
117 10 30
200 10 40
200 10 50
200 10 60
206 5 100
83 1 200
One Omega Drive | Stamford, CT 06907 | 1-888-TC-OMEGA (1-888-826-6342) | info@omega.com
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