General Purpose Fuses
FLNR_ID/FLSR_ID Indicator
®
Class RK5 Fuses
250/600 VAC • Dual-Element, Time Delay • 1/10 – 600 Amperes
Applications
Service entrance switches
Switchboard main and feeder switches
Motor control center mains and motor branch circuits
Individual fused combination motor controllers
Distribution panelboards
Industrial control panels
Protection of fully rated panelboards and loadcenters
All general purpose circuits
General Purpose Fuses
Features/Benefits
• Reduce Downtime — A glance at the indicating window of a FLNR_ID
or FLSR_ID Indicator fuse pinpoints open fuses. If the indicating strip
is black, the fuse has opened. It’s that simple.
• Reduce Nuisance Opening — FLNR_ID and FLSR_ID Indicator
fuses have superior time-delay and cycling characteristics which can
lengthen fuse life and decrease needless opening.
• Reduce Fuse Inventory — Because FLNR_ID and FLSR_ID Indicator
fuses have superior performance characteristics, they can be used on a
variety of applications, thus decreasing fuse inventory.
• Reduce Equipment Damage — FLNR_ID and FLSR_ID Indicator
fuses have superior overload and short-circuit protection which can
reduce equipment damage.
• Reduce Accidents — The FLNR_ID and FLSR_ID Indicator fuses
improve safety by minimizing exposure to live circuits. Unlike other
forms of blown fuse indication, it doesn’t matter if the power is on
or off. No second guessing whether a light means a fuse is good or
bad, and no current going across a blown fuse to power a lighted
accessory.
Littelfuse FLNR_ID/FLSR_ID Indicator fuses provide blown fuse
indication at a glance. The patented state-of-the-art solid state design
provides maximum reliability and superior performance characteristics
in a true dual-element design. The use of Indicator fuses reduces
downtime and nuisance openings, increases safety, and can save
thousands of dollars in lost production time.
Specifications
Voltage Ratings:
AC: 250 Volts (FLNR_ID);
600 Volts (FLSR_ID)
DC: 125 Volts (FLNR
1
⁄
10
– 30A);
125 Volts (FLNR_ID 35 – 600A);
300 Volts (FLSR_ID)
AC: 200,000 amperes rms symmetrical
300,000 amperes rms symmetrical
(Littelfuse self-certified)
DC: 20,000 amperes
1
⁄
10
– 600 amperes
Standard 248-12, Class RK5
UL Listed (File No: E81895)
CSA Certified (File No: LR29862)
QPL: Federal Specification WF-1814
Ampere Ratings
6
⁄
10**
⁄
10
1
8
⁄
10
4
8
30
80
225
1
8
⁄
8
⁄
10
2
4
1
⁄
2
9
35
90
250
15
⁄
100
1
2
1
⁄
4
5
10
40
100
300
2
1
1
6
⁄
10
1 ⁄
8
2 ⁄
2
5 ⁄
10
12
45
110
350
1
⁄
4
1
1
⁄
4
2
8
⁄
10
6
15
50
125
400
3
⁄
10
1
4
⁄
10
3
6
1
⁄
4
17
1
⁄
2
60
150
450
4
1
2
⁄
10
1 ⁄
2
3 ⁄
10
7
20
70
175
500
1
⁄
2
1
6
⁄
10
3
1
⁄
2
7
1
⁄
2
25
75*
200
600
*FLSR_ID only **FLNR only
Example part number (series & amperage): FLSR100ID
NOTE: For
1
⁄
10
– 30 ampere 250 volt fuses, order non-indicating FLNR series fuses.
NOTE: All FLNR_ID fuses rated 35 – 600A are Indicator fuses.
NOTE: All FLSR_ID fuses rated 1 amp and above are Indicator fuses.
1
Interrupting Ratings:
Ampere Range:
Approvals:
Recommended Fuse Blocks
LR250 series (for FLNR_ID series fuses)
LR600 series (for FLSR_ID series fuses)
Refer to Blocks & Holders section of this catalog for additional information.
© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
www.littelfuse.com
29
General Purpose Fuses
FLNR_ID/FLSR_ID Indicator
®
Class RK5 Fuses
250/600 VAC • Dual-Element, Time Delay • 1/10 – 600 Amperes
Current-Limiting Effects of FLNR_ID (250V) 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
30A
1,400
1,550
2,000
2,250
2,400
2,550
2,650
2,800
3,000
3,200
3,400
3,850
4,100
4,300
60A
2,100
2,500
3,150
3,400
3,750
4,100
4,300
4,400
5,000
5,250
5,750
6,000
7,000
7,500
100A
3,100
3,900
4,400
5,000
5,250
5,600
5,800
6,250
6,500
7,000
7,500
8,000
9,000
9,750
200A
5,000
6,500
7,250
8,250
9,000
9,500
9,750
10,250
10,500
11,500
12,500
13,500
15,200
16,500
400A
5,000
9,500
10,500
12,000
12,500
13,500
14,000
15,000
16,000
17,000
19,000
21,000
24,000
26,000
600A
5,000
10,000
14,000
16,000
16,500
18,000
19,000
20,000
21,000
23,000
25,500
27,500
31,500
34,000
General Purpose Fuses
* Prospective RMS Symmetrical Amperes Short-Circuit Current
Note: Data Derived from Peak Let-Thru Curves
Current-Limiting Effects of FLSR_ID (600V) 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
30A
1,250
1,600
1,800
2,250
2,450
2,700
2,900
3,000
3,400
3,600
3,900
4,300
4,500
4,600
60A
2,100
2,850
3,400
3,800
4,100
4,500
4,800
5,000
5,250
5,750
6,250
6,750
7,600
8,400
100A
3,200
4,300
5,000
5,500
5,700
6,400
6,700
7,250
7,750
8,100
9,000
9,750
11,100
12,250
200A
5,000
7,250
8,500
9,500
10,250
10,750
11,500
12,000
13,000
14,000
15,000
16,500
19,000
21,500
400A
5,000
10,000
13,500
15,750
17,000
18,000
19,000
19,500
21,000
22,000
24,000
26,000
28,000
30,000
600A
5,000
10,000
15,000
19,000
21,000
23,000
24,250
27,000
29,000
30,500
33,000
35,000
38,000
40,000
* Prospective RMS Symmetrical Amperes Short-Circuit Current
Note: Data Derived from Peak Let-Thru Curves
© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
www.littelfuse.com
31
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