POWR-PRO
®
Fuses
LLSRK_ID Series Indicator
®
POWR-PRO
®
Class RK1 Fuses
600 VAC • Dual-Element, Time-Delay • 1/10 – 600 Amperes
Applications
POWR-PRO
®
Fuses
All general purpose circuits
Motors
Transformers
Solenoids
Fluorescent lighting
All system components with high in-rush currents
Features/Benefits
• Reduce downtime — The indicating window of the LLSRK_ID
immediately identifies the open fuse. If the indicating strip is black,
the fuse has opened. It’s that simple. Maintenance personnel can
immediately determine that there is an open fuse.
• Reduce fuse inventory — The superior performance of the LLSRK_ID
allows it to be used in a variety of applications, thus decreasing fuse
inventory.
• Reduce nuisance opening — Indicator fuses offer superior time-delay
and cycling characteristics, which can lengthen fuse life.
• Reduce equipment damage — Indicator fuses provide superior
overload and short-circuit protection that can reduce equipment
damage. The LLSRK_ID is extremely current-limiting and provides
IEC Type 2 “No Damage” protection to IEC and NEMA type motor
starters.
• Reduce accidents — The LLSRK_ID Indicator fuse improves safety
by minimizing exposure to live circuits. Unlike other forms of blown
fuse indication, once the indicating strip darkens, it stays dark. Other
forms of indication require the power to remain on, which causes a
potential safety hazard to personnel.
The all new LLSRK_ID series fuse is the most advanced Class RK1
fuse available today providing unparalleled performance and protection
to modern circuits. The patented Indicator technology provides instant
identification of a blown fuse greatly enhancing system up-time, while
the precision formed short-circuit elements virtually eliminate damage
to components from unexpected electrical faults. In addition, the all new
solid-state overload section has no moving parts, stopping unnecessary
fatigue failures commonly found in other spring loaded fuses.
Ordering Information
For online ordering use part number LSRK.
Specifications
Voltage Rating:
Interrupting Ratings:
600 VAC/300 VDC
AC: 200,000 amperes rms symmetrical
300,000 amperes rms symmetrical
(Littelfuse self-certified)
DC: 20,000 amperes
1/10 – 600 amperes
AC: Standard 248-12, Class RK1
UL Listed (File No: E81895)
CSA Certified (File No: LR29862)
DC: Littelfuse self-certified
Ampere Ratings
⁄
10
15
⁄
100
2
⁄
10
1
⁄
4
3
⁄
10
4
⁄
10
1
⁄
2
6
⁄
10
8
⁄
10
1
Ampere Range:
Approvals:
1
1
1
⁄
8
1
1
⁄
4
1
4
⁄
10
1
6
⁄
10
1
8
⁄
10
2
2
1
⁄
4
2
1
⁄
2
2
8
⁄
10
3
2
3 ⁄
10
3
1
⁄
2
4
4
1
⁄
2
5
6
5 ⁄
10
6
6
1
⁄
4
7
8
9
10
12
15
17
1
⁄
2
20
25
30
35
40
45
50
60
70
75
80
90
100
110
125
150
175
200
225
250
300
350
400
450
500
600
Example part number (series & amperage): LLSRK30ID.
NOTE: All fuses rated 1 amp and above are Indicator fuses.
Recommended Fuse Blocks
LR600 Series
Refer to the Blocks & Holders section of this catalog for
additional information.
© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
www.littelfuse.com
POWR-PRO
®
Fuses
LLSRK_ID Series Indicator
®
POWR-PRO
®
Class RK1 Fuses
600 VAC • Dual-Element, Time-Delay • 1/10 – 600 Amperes
POWR-PRO
®
Fuses
Plated End Caps
Blown Fuse Indicator Assembly
Precision Formed Short Circuit Element
Fiberglass Reinforced Pultruded Body
Granular Quartz Filling
Elastomeric Silicone Overload Section
1A
1.25A
1.6A
2A
2.8A
3.5A
12A
15A
30A
35A
1000
100
TIME IN SECONDS
10
TIME IN SECONDS
1
0.1
0.01
0.5
1
10
60A
100
5A
1000 2000
CURRENT IN AMPERES
CURRENT IN AMPERES
Contact Littelfuse for additional fuse curves.
www.littelfuse.com
© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
POWR-PRO
®
Fuses
LLSRK_ID Series Indicator
®
POWR-PRO
®
Class RK1 Fuses
600 VAC • Dual-Element, Time-Delay • 1/10 – 600 Amperes
Current-Limiting Effects of LLSRK_ID (600V) Fuses
POWR-PRO
®
Fuses
Short Circuit Current*
5,000
0,000
5,000
0,000
5,000
30,000
35,000
0,000
50,000
0,000
0,000
00,000
50,000
00,000
Apparent RMS Symmetrical Current for Various Fuse Ratings
30A
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
0A
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
00A
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
00A
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
00A
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
00A
--
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
* Prospective RMS Symmetrical Amperes Short-Circuit Current
Note: Data derived from Peak Let-Thru Curves
1000000
100000
PEAK LET-THRU IN AMPERES
10000
60A
30A
12A
5A
3.5A
1000
100000
AVAILABLE FAULT CURRENT
SYMMETRICAL R.M.S. AMPERES
200000
10000
100
1000
100
PEAK LET-THRU IN AMPERES
AVAILABLE FAULT CURRENT
SYMMETRICAL R.M.S. AMPERES
© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
www.littelfuse.com
3
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