POWR-GARD
®
Fuse Datasheet
Class RK1 – llNRK • llsRK • llsRK_ID seRIes FUses
250/600 Vac • Dual Element • Time-Delay •
1
/
10
-600 A
QPL
Ordering Information
15 100
/
/
2
/
10
1
/
4
3
/
10
4
/
10
1
/
2
6
/
10
8
/
10
1 10
1
1
1
/
8
1
1
/
4
1
4
/
10
1
6
/
10
1
8
/
10
2
2
1
/
4
2
1
/
2
ampeRe RatINgs
2 /
6
1
/
4
25
3
7
30
3
2
/
10
8
35
3
1
/
2
9
40
4
10
45
4
1
/
2
12
50
5
15
60
5
6
/
10
17
1
/
2
70
6
20
75*
8 10
80
90
100
110
125
150
175
200
225
250
300
350
400
450
500
600
Note: All LLSRK_ID fuses rated 1 amp and above are Indicator
®
fuses.
*75 A is only available for the 600 V.
600 V
type
seRIes
LLSRK_ID
LLSRK
Amp
60
60
Description
RK1 fuses are extremely current-limiting fuses meaning they
greatly reduce or eliminate damage to circuits and equipment under
short-circuit conditions. Replacing existing Class H, K and RK5 fuses
with RK1 fuses is one of the easiest ways to immediately improve
the protection of plant workers and equipment.
INDICAtING
NON-INDICAtING
Catalog
NUmbeR
LLSRK060ID
LLSRK060
Catalog
NUmbeR
LLNRK080
oRDeRINg
NUmbeR
LSRK060.tXID
LSRK060.t
oRDeRINg
NUmbeR
LNRK080.V
250 V
type
NON-INDICAtING
seRIes
LLNRK
Amp
80
Applications
•
•
•
•
All general purpose circuits
Motors
Transformers
Safety upgrades
Web Resources
Download TC Curves, CAD drawings and other technical
information:
littelfuse.com/llsrk
littelfuse.com/llnrk
Dimensions
Please refer to the Class R dimensions page 3.
Features/Benefits
•
•
•
•
•
POWR-PRO Performance
Indication available
Dual-element design
Extremely Current-Limiting
IEC Type 2 “No Damage” protection to IEC and NEMA
type motor starters
• Indicating and DIN mount fuse holders available
Peak Let-Thru Curve (600 V)
LLSRK
1000000
100000
500 A
400 A
200 A
10000
100 A
60 A
30 A
Voltage Ratings
Interrupting Ratings
Ampere Range
Approvals
600 Vac/300 Vdc (LLSRK/LLSRK_ID)
250 Vac/125 Vdc (LLNRK)
AC: 200 kA rms symmetrical
300 kA rms symmetrical
(Littelfuse self-certified)
DC: 20 kA
1/10 – 600 A
AC: Standard 248-12, Class RK1
UL Listed (File: E81895)
CSA Certified (File: LR29862)
DC: Littelfuse self-certified
Federal Specification WF-1814
(QPL- W-F-1814)
PEAK LET-THRU IN AMPERES
Specifications
1000
100
100
1000
10000
100000
200000
Recommended Fuse Holders
LFR60 Series • LFR25 Series
littelfuse.com
AVAILABLE FAULT CURRENT
SYMMETRICAL R.M.S. AMPERES
Note: For more information, see Peak Let-Thru Table
1 of 3
© 2014 Littelfuse POWR-GARD
®
Products
Rev: 040913
POWR-GARD
®
Fuse Datasheet
Class RK1 – llNRK • llsRK • llsRK_ID seRIes FUses
Current-Limiting Effects of LLSRK and LLSRK_ID (600 V) Fuses
shoRt CIRCUIt
CURReNt*
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
50,000
60,000
80,000
100,000
150,000
200,000
appaReNt Rms symmetRICal CURReNt FoR VaRIoUs FUse RatINgs
30 A
1,060
1,350
1,600
1,700
1,900
2,000
2,100
2,200
2,400
2,500
2,700
2,900
3,200
3,300
60 A
1,600
2,000
2,300
2,600
2,800
3,000
3,100
3,300
3,500
3,800
4,000
4,200
4,600
4,700
100 A
2,100
2,800
3,200
3,600
3,800
4,100
4,400
4,600
4,900
5,200
5,700
6,200
7,300
8,000
200 A
2,600
3,400
3,900
4,500
4,800
5,200
5,700
6,000
6,500
7,000
7,750
8,500
10,000
11,000
400 A
4,100
5,250
6,000
6,700
7,500
8,000
8,500
9,000
9,500
10,000
11,000
12,000
14,000
16,000
600 A
--
8,000
9,000
10,000
11,000
12,000
12,500
13,000
14,000
15,000
17,000
18,000
21,000
23,000
Visit
www.littelfuse.com/llsrk
for 600 V Current-Limiting effects
Current-Limiting Effects of LLNRK (250 V) Fuses
shoRt CIRCUIt
CURReNt*
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
50,000
60,000
80,000
100,000
150,000
200,000
appaReNt Rms symmetRICal CURReNt FoR VaRIoUs FUse RatINgs
30 A
900
1,100
1,250
1,400
1,500
1,600
1,700
1,800
1,900
2,000
2,200
2,300
2,500
2,600
60 A
1,400
1,900
2,100
2,400
2,600
2,800
2,850
3,000
3,200
3,500
3,900
4,000
4,500
4,800
100 A
2,000
2,700
3,100
3,500
3,900
4,000
4,300
4,600
4,800
5,200
5,700
6,000
6,700
7,000
200 A
2,700
3,500
4,200
4,600
5,000
5,250
5,500
5,800
6,300
6,700
7,200
8,100
9,100
9,700
400 A
4,800
6,200
7,000
8,000
8,300
9,000
9,500
9,800
10,200
11,000
12,200
12,700
14,000
15,000
600 A
5,000
8,500
9,500
10,800
11,500
12,000
12,500
13,500
14,000
15,000
16,000
17,000
19,000
20,000
*Prospective RMS Symmetrical Amperes Short-Circuit Current
Note: Data derived from Peak Let-thru Curves
Visit
www.littelfuse.com/llnrk
for 250 V Current-Limiting effects
LLSRK_ID Fuses—Quality Construction
for performance you can rely on…
Littelfuse
LLSRK_ID
Fuses feature true dual-element
construction. This robust design withstands
repeated surges within rated time delay
without opening needlessly, eliminating
downtime caused by power surges
or equipment demands.
Plated End Caps
Blown Fuse Indicator Assembly
Precision Formed Short Circuit Element
Fiberglass Reinforced Pultruded Body
Elastomeric Silicone Overload Section
Granular Quartz Filling
littelfuse.com
2 of 3
© 2014 Littelfuse POWR-GARD
®
Products
Rev: 040913
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