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
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
Ampere Ratings
1
**
6
8
10
10
10
10
Voltage Ratings:
AC: 250 Volts (FLNR_ID);
⁄
⁄
⁄
1 ⁄
4
4 ⁄
8
9
30
35
40
45
50
60
70
80
90
225
250
300
350
400
450
500
600
1
8
1
8
2
600 Volts (FLSR_ID)
⁄
2
1
15
2
1
10
100
10
4
DC: 125 Volts (FLNR ⁄ – 30A);
⁄
1
2 ⁄
5
10
12
15
100
110
125
150
175
200
1
1
6
8
4
2
10
125 Volts (FLNR_ID 35 – 600A);
300 Volts (FLSR_ID)
AC: 200,000 amperes rms symmetrical
300,000 amperes rms symmetrical
(Littelfuse self-certified)
⁄
1 ⁄
2 ⁄
5 ⁄
1
1
8
4
10
⁄
1 ⁄
2 ⁄
3
6
3
4
4
1
1
10
10
2
10
2
4
2
Interrupting Ratings:
⁄
⁄
1 ⁄
6 ⁄
7
17 ⁄
1
2
10
2
1 ⁄
3 ⁄
20
25
1
6
1
1
10
2
⁄
1 ⁄
3 ⁄
7 ⁄
75*
DC: 20,000 amperes
*FLSR_ID only **FLNR only
1
Example part number (series & amperage): FLSR100ID
10
Ampere Range:
Approvals:
⁄
– 600 amperes
1
10
Standard 248-12, Class RK5
NOTE: For ⁄ – 30 ampere 250 volt fuses, order non-indicating FLNR series fuses.
UL Listed (File No: E81895)
NOTE: All FLNR_ID fuses rated 35 – 600A are Indicator fuses.
CSA Certified (File No: LR29862)
MSHA 300 Volt Listing (FLSR_ID)
QPL: Federal Specification WF-1814
NOTE: All FLSR_ID fuses rated 1 amp and above are Indicator fuses.
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
w w w . l i t t e l f u s e . c o m
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