General Purpose Fuses FLNR_ID/FLSR_ID Indicator® Class RK5 Fuses
General Purpose Fuses
FLNR_ID/FLSR_ID Indicator® Class RK5 Fuses 250/600 VAC • Dual-Element, Time Delay • 1/10 – 600 Amperes
Applications
General Purpose Fuses
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
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.
• 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.
Specifications
Ampere Ratings
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) Interrupting Ratings: AC: 200,000 amperes rms symmetrical 300,000 amperes rms symmetrical (Littelfuse self-certified) DC: 20,000 amperes 1 Ampere Range: ⁄10 – 600 amperes Approvals: Standard 248-12, Class RK5 UL Listed (File No: E81895) CSA Certified (File No: LR29862) MSHA 300 Volt Listing (FLSR_ID) QPL: Federal Specification WF-1814
6 ⁄10** ⁄10 18 ⁄10 4 8 30 80 225 1 8 ⁄8 ⁄10 2 41⁄2 9 35 90 250 15 ⁄100 1 2 1⁄4 5 10 40 100 300 2 ⁄10 11⁄ 8 2 1⁄2 5 6 ⁄10 12 45 110 350 1 ⁄4 11⁄4 2 8 ⁄10 6 15 50 125 400 3 ⁄10 14 ⁄10 3 6 1⁄4 17 1⁄2 60 150 450 4 ⁄10 11⁄ 2 3 2 ⁄10 7 20 70 175 500 1 ⁄2 16 ⁄10 31⁄2 71⁄2 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
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 A
F G
B
D
E General Purpose Fuses
Refer To Fig. No.
1
/10 – 30
1
35 – 60
1
70 – 100
2
110 – 200
2
225 – 400
2
450 – 600
2
F
D
J
G 70-600A
FIG. 2 Dimensions In Inches (mm in parentheses)
Series FLNR FLSR_ID FLNR_ID FLSR_ID FLNR_ID FLSR_ID FLNR_ID FLSR_ID FLNR_ID FLSR_ID FLNR_ID FLSR_ID
E
C B
H
C
FIG. 1 Amperes
A
K
A
B
2 (50.8) 5 (127.0) 3 (76.2) 51⁄2 (139.7) 5 7⁄8 (149.2) 7 7⁄8 (200.0) 71⁄8 (181.0) 9 5 ⁄8 (244.5) 8 5 ⁄8 (219.1) 115 ⁄8 (295.3) 10 3 ⁄8 (263.5) 13 3 ⁄8 (339.7)
C
D
12 9 16 ⁄ (12.7) ⁄ (12.7) ⁄ (14.3) 3 4 5 8 13 16 ⁄ (19.1) ⁄ (15.9) ⁄ (20.6) 3 4 5 8 13 16 ⁄ (19.1) ⁄ (15.9) ⁄ (20.6) 5 8 1 (25.4) ⁄ (15.9) 11 ⁄ 16 (27.0) 1 (25.4) 11 ⁄ 16 (27.0) 11 ⁄16 (27.0) 14 1 ⁄ (31.8) 11 ⁄ 16 (27.0) 15 ⁄16 (33.3) 11⁄2 (38.1) 115 ⁄32 (37.3) 119 ⁄32 (40.5) 13 ⁄4 (44.5) 115 ⁄32 (37.3) 127⁄32 (46.8) 2 (50.8) 115 ⁄16 (49.2) 2 3 ⁄32 (53.2) 21⁄2 (63.5) 2 (50.8) 2 19 ⁄32 (65.9) 12 3 8 2 ⁄ (63.5) 2 ⁄ (60.3) 219 ⁄32 (65.9) 3 (76.2) 2 13 ⁄ 32 (61.1) 3 3 ⁄32 (78.6) 12
E
F
G
H
J
K
⁄ (2.0) 3 32 ⁄ (2.4) 3 32 ⁄ (2.4) 3 32 ⁄ (2.4) 18 ⁄ (3.2) 18 ⁄ (3.2) 3 16 ⁄ (4.8) 3 16 ⁄ (4.8) 14 ⁄ (6.4) 14 ⁄ (6.4) 14 ⁄ (6.4) 14 ⁄ (6.4)
⁄ (4.0) 3 16 ⁄ (4.8) 3 16 ⁄ (4.8) 14 ⁄ (6.4) 3 4 ⁄ (19.1) 3 4 ⁄ (19.1) 11⁄8 (28.6) 11⁄8 (28.6) 15 ⁄8 (41.3) 15 ⁄ 8 (41.3) 2 (50.8) 2 (50.8)
⁄ (9.5) 5 8 ⁄ (15.9) 5 8 ⁄ (15.9) 78 ⁄ (22.2) 11⁄4 (31.8) 11⁄2 (38.1) 127⁄ 32 (46.8) 23 ⁄32 (53.2) 211 ⁄32 (59.5) 227⁄32 (72.2) 227⁄ 32 (72.2) 311⁄32 (84.9)
— — — — 14 ⁄ (6.4) 14 ⁄ (6.4) 7 16 ⁄ (11.1) 7 16 ⁄ (11.1) 5 8 ⁄ (15.9) 5 8 ⁄ (15.9) 3 4 ⁄ (19.1) 3 4 ⁄ (19.1)
— — — — 9 32 ⁄ (7.1) 9 32 ⁄ (7.1) 9 32 ⁄ (7.1) 9 32 ⁄ (7.1) 13 32 ⁄ (10.3) 13 32 ⁄ (10.3) 17 32 ⁄ (13.5) 17 32 ⁄ (13.5)
— — — — 12 ⁄ (12.7) 12 ⁄ (12.7) 11 16 ⁄ (17.5) 11 16 ⁄ (17.5) 15 16 ⁄ (23.8) 15 16 ⁄ (23.8) 11⁄8 (28.6) 11⁄8 (28.6)
5 64
5 32
3 8
FLSR_ID
1000 800 600
1000 800 600 400 300 200
400 300 200 100 80 60
100 80 60 40 30 20
40 30
10 8 6
TIME IN SECONDS
TIME IN SECONDS
20
4 3 2 1 .8 .6
10 8 6 4 3 2
.4 .3
1 .8 .6 .4 .3
.2
.2
.1 .08 .06
.1 .08 .06 .04 .03 .02
.04 .03 .02
300 400
200
60 80 100
30 40
20
6 8 10
2
3 4
.6 .8 1
.3 .4
.1
.2
600 800 1000
CURRENT IN AMPERES
10000 8000 6000 4000 3000 2000
1000 800 600 400 300 200
www.littelfuse.com
100 80 60 40 30 20
CURRENT IN AMPERES
10 8 6 4 3 2
1
.01
.01
30
10A 15A 20A 25A 30A
2/10A 1/4A 3/10A 4/10A 1/2A 6/10A 8/10A 1A 1 1/4A 1 4/10A 2A 2 1/2A 4 1/2A 5A 7A 7 1/2A 9A
FLNR
1A 1.25A 1.6A 2A 2.5A 3A 4A 6A
For additional application information request Product Bulletin EL-4
© 2005 Littelfuse • POWR-GARD™ Products Catalog
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*
Apparent RMS Symmetrical Current for Various Fuse Ratings 30A
60A
100A
200A
400A
600A
5,000
1,400
2,100
3,100
5,000
5,000
5,000
10,000
1,550
2,500
3,900
6,500
9,500
10,000
2,000
3,150
4,400
7,250
10,500
14,000
2,250
3,400
5,000
8,250
12,000
16,000
25,000
2,400
3,750
5,250
9,000
12,500
16,500
30,000
2,550
4,100
5,600
9,500
13,500
18,000
35,000
2,650
4,300
5,800
9,750
14,000
19,000 20,000
40,000
2,800
4,400
6,250
10,250
15,000
50,000
3,000
5,000
6,500
10,500
16,000
21,000
60,000
3,200
5,250
7,000
11,500
17,000
23,000
80,000
3,400
5,750
7,500
12,500
19,000
25,500
100,000
3,850
6,000
8,000
13,500
21,000
27,500
150,000
4,100
7,000
9,000
15,200
24,000
31,500
200,000
4,300
7,500
9,750
16,500
26,000
34,000
General Purpose Fuses
15,000 20,000
* 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
Apparent RMS Symmetrical Current for Various Fuse Ratings 30A
60A
100A
200A
400A
600A
1,250
2,100
3,200
5,000
5,000
5,000
10,000
1,600
2,850
4,300
7,250
10,000
10,000
15,000
1,800
3,400
5,000
8,500
13,500
15,000 19,000
20,000
2,250
3,800
5,500
9,500
15,750
25,000
2,450
4,100
5,700
10,250
17,000
21,000
30,000
2,700
4,500
6,400
10,750
18,000
23,000
35,000
2,900
4,800
6,700
11,500
19,000
24,250
40,000
3,000
5,000
7,250
12,000
19,500
27,000
50,000
3,400
5,250
7,750
13,000
21,000
29,000
60,000
3,600
5,750
8,100
14,000
22,000
30,500
80,000
3,900
6,250
9,000
15,000
24,000
33,000
100,000
4,300
6,750
9,750
16,500
26,000
35,000
150,000
4,500
7,600
11,100
19,000
28,000
38,000
200,000
4,600
8,400
12,250
21,500
30,000
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
General Purpose Fuses
FLNR_ID/FLSR_ID Indicator® Class RK5 Fuses 250/600 VAC • Dual-Element, Time Delay • 1/10 – 600 Amperes
FLNR_ID 100A
FLSR_ID
400A 600A
200A
1000 800
600
600
400
400
300
300
200
200
100 80
100 80
60
60
40
40
30
30
20
20
TIME IN SECONDS
TIME IN SECONDS
General Purpose Fuses
60A 1000 800
10 8 6 4 3 2
1 .8
60A
100A
200A
400A 600A
10 8 6 4 3 2
1 .8
CURRENT IN AMPERES
100000 80000
60000
40000
30000
20000
10000 8000
6000
4000
3000
2000
1000 800
600
400
300
200
100 80
60
40
30
20
10 8
6 5
1000000 800000
600000
400000
300000
200000
100000 80000
60000
40000
30000
20000
.01
10000 8000
.02
.01
6000
.03
.02
4000
.03
3000
.06 .05 .04
2000
.04
1000 800
.1 .08
.06
600
.1 .08
400
.2
300
.3
.2
200
.4
.3
100 80
.6
.4
60 50
.6
CURRENT IN AMPERES
30A
15A
FLSR_ID
FLNR_ID
1000000
1000000
800000
800000
600000
600000 400000
400000
300000
300000 200000
200000 100000
80000
600A
60000
400A 200A
40000 30000
100A 20000 60A 10000 8000 6000 4000 3000 2000
PEAK LET - THRU IN AMPERES
PEAK LET - THRU IN AMPERES
600A
80000
100000
400A
60000 50000
200A
40000 30000
100A
20000
60A
10000
30A
8000 6000 5000
15A
4000 3000 2000
1000
1000
800
800
600
600 400
400
300
300 200
200
200000
100000
80000
60000
40000
30000
20000
10000
8000
6000
4000
3000
2000
1000
800
www.littelfuse.com
600
32
300
200000
100000
80000
60000
40000
30000
20000
10000
8000
6000
4000
3000
2000
1000
800
600
300
400
200
100
AVAILABLE FAULT CURRENT SYMMETRICAL R.M.S. AMPERES
400
200
100
100
100
AVAILABLE FAULT CURRENT SYMMETRICAL R. M. S. AMPERES
© 2005 Littelfuse • POWR-GARD™ Products Catalog
FLNR_ID/FLSR_ID Indicator® Class RK5 Fuses 250/600 VAC • Dual-Element, Time Delay • 1/10 – 600 Amperes
Applications
General Purpose Fuses
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
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.
• 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.
Specifications
Ampere Ratings
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) Interrupting Ratings: AC: 200,000 amperes rms symmetrical 300,000 amperes rms symmetrical (Littelfuse self-certified) DC: 20,000 amperes 1 Ampere Range: ⁄10 – 600 amperes Approvals: Standard 248-12, Class RK5 UL Listed (File No: E81895) CSA Certified (File No: LR29862) MSHA 300 Volt Listing (FLSR_ID) QPL: Federal Specification WF-1814
6 ⁄10** ⁄10 18 ⁄10 4 8 30 80 225 1 8 ⁄8 ⁄10 2 41⁄2 9 35 90 250 15 ⁄100 1 2 1⁄4 5 10 40 100 300 2 ⁄10 11⁄ 8 2 1⁄2 5 6 ⁄10 12 45 110 350 1 ⁄4 11⁄4 2 8 ⁄10 6 15 50 125 400 3 ⁄10 14 ⁄10 3 6 1⁄4 17 1⁄2 60 150 450 4 ⁄10 11⁄ 2 3 2 ⁄10 7 20 70 175 500 1 ⁄2 16 ⁄10 31⁄2 71⁄2 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
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 A
F G
B
D
E General Purpose Fuses
Refer To Fig. No.
1
/10 – 30
1
35 – 60
1
70 – 100
2
110 – 200
2
225 – 400
2
450 – 600
2
F
D
J
G 70-600A
FIG. 2 Dimensions In Inches (mm in parentheses)
Series FLNR FLSR_ID FLNR_ID FLSR_ID FLNR_ID FLSR_ID FLNR_ID FLSR_ID FLNR_ID FLSR_ID FLNR_ID FLSR_ID
E
C B
H
C
FIG. 1 Amperes
A
K
A
B
2 (50.8) 5 (127.0) 3 (76.2) 51⁄2 (139.7) 5 7⁄8 (149.2) 7 7⁄8 (200.0) 71⁄8 (181.0) 9 5 ⁄8 (244.5) 8 5 ⁄8 (219.1) 115 ⁄8 (295.3) 10 3 ⁄8 (263.5) 13 3 ⁄8 (339.7)
C
D
12 9 16 ⁄ (12.7) ⁄ (12.7) ⁄ (14.3) 3 4 5 8 13 16 ⁄ (19.1) ⁄ (15.9) ⁄ (20.6) 3 4 5 8 13 16 ⁄ (19.1) ⁄ (15.9) ⁄ (20.6) 5 8 1 (25.4) ⁄ (15.9) 11 ⁄ 16 (27.0) 1 (25.4) 11 ⁄ 16 (27.0) 11 ⁄16 (27.0) 14 1 ⁄ (31.8) 11 ⁄ 16 (27.0) 15 ⁄16 (33.3) 11⁄2 (38.1) 115 ⁄32 (37.3) 119 ⁄32 (40.5) 13 ⁄4 (44.5) 115 ⁄32 (37.3) 127⁄32 (46.8) 2 (50.8) 115 ⁄16 (49.2) 2 3 ⁄32 (53.2) 21⁄2 (63.5) 2 (50.8) 2 19 ⁄32 (65.9) 12 3 8 2 ⁄ (63.5) 2 ⁄ (60.3) 219 ⁄32 (65.9) 3 (76.2) 2 13 ⁄ 32 (61.1) 3 3 ⁄32 (78.6) 12
E
F
G
H
J
K
⁄ (2.0) 3 32 ⁄ (2.4) 3 32 ⁄ (2.4) 3 32 ⁄ (2.4) 18 ⁄ (3.2) 18 ⁄ (3.2) 3 16 ⁄ (4.8) 3 16 ⁄ (4.8) 14 ⁄ (6.4) 14 ⁄ (6.4) 14 ⁄ (6.4) 14 ⁄ (6.4)
⁄ (4.0) 3 16 ⁄ (4.8) 3 16 ⁄ (4.8) 14 ⁄ (6.4) 3 4 ⁄ (19.1) 3 4 ⁄ (19.1) 11⁄8 (28.6) 11⁄8 (28.6) 15 ⁄8 (41.3) 15 ⁄ 8 (41.3) 2 (50.8) 2 (50.8)
⁄ (9.5) 5 8 ⁄ (15.9) 5 8 ⁄ (15.9) 78 ⁄ (22.2) 11⁄4 (31.8) 11⁄2 (38.1) 127⁄ 32 (46.8) 23 ⁄32 (53.2) 211 ⁄32 (59.5) 227⁄32 (72.2) 227⁄ 32 (72.2) 311⁄32 (84.9)
— — — — 14 ⁄ (6.4) 14 ⁄ (6.4) 7 16 ⁄ (11.1) 7 16 ⁄ (11.1) 5 8 ⁄ (15.9) 5 8 ⁄ (15.9) 3 4 ⁄ (19.1) 3 4 ⁄ (19.1)
— — — — 9 32 ⁄ (7.1) 9 32 ⁄ (7.1) 9 32 ⁄ (7.1) 9 32 ⁄ (7.1) 13 32 ⁄ (10.3) 13 32 ⁄ (10.3) 17 32 ⁄ (13.5) 17 32 ⁄ (13.5)
— — — — 12 ⁄ (12.7) 12 ⁄ (12.7) 11 16 ⁄ (17.5) 11 16 ⁄ (17.5) 15 16 ⁄ (23.8) 15 16 ⁄ (23.8) 11⁄8 (28.6) 11⁄8 (28.6)
5 64
5 32
3 8
FLSR_ID
1000 800 600
1000 800 600 400 300 200
400 300 200 100 80 60
100 80 60 40 30 20
40 30
10 8 6
TIME IN SECONDS
TIME IN SECONDS
20
4 3 2 1 .8 .6
10 8 6 4 3 2
.4 .3
1 .8 .6 .4 .3
.2
.2
.1 .08 .06
.1 .08 .06 .04 .03 .02
.04 .03 .02
300 400
200
60 80 100
30 40
20
6 8 10
2
3 4
.6 .8 1
.3 .4
.1
.2
600 800 1000
CURRENT IN AMPERES
10000 8000 6000 4000 3000 2000
1000 800 600 400 300 200
www.littelfuse.com
100 80 60 40 30 20
CURRENT IN AMPERES
10 8 6 4 3 2
1
.01
.01
30
10A 15A 20A 25A 30A
2/10A 1/4A 3/10A 4/10A 1/2A 6/10A 8/10A 1A 1 1/4A 1 4/10A 2A 2 1/2A 4 1/2A 5A 7A 7 1/2A 9A
FLNR
1A 1.25A 1.6A 2A 2.5A 3A 4A 6A
For additional application information request Product Bulletin EL-4
© 2005 Littelfuse • POWR-GARD™ Products Catalog
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*
Apparent RMS Symmetrical Current for Various Fuse Ratings 30A
60A
100A
200A
400A
600A
5,000
1,400
2,100
3,100
5,000
5,000
5,000
10,000
1,550
2,500
3,900
6,500
9,500
10,000
2,000
3,150
4,400
7,250
10,500
14,000
2,250
3,400
5,000
8,250
12,000
16,000
25,000
2,400
3,750
5,250
9,000
12,500
16,500
30,000
2,550
4,100
5,600
9,500
13,500
18,000
35,000
2,650
4,300
5,800
9,750
14,000
19,000 20,000
40,000
2,800
4,400
6,250
10,250
15,000
50,000
3,000
5,000
6,500
10,500
16,000
21,000
60,000
3,200
5,250
7,000
11,500
17,000
23,000
80,000
3,400
5,750
7,500
12,500
19,000
25,500
100,000
3,850
6,000
8,000
13,500
21,000
27,500
150,000
4,100
7,000
9,000
15,200
24,000
31,500
200,000
4,300
7,500
9,750
16,500
26,000
34,000
General Purpose Fuses
15,000 20,000
* 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
Apparent RMS Symmetrical Current for Various Fuse Ratings 30A
60A
100A
200A
400A
600A
1,250
2,100
3,200
5,000
5,000
5,000
10,000
1,600
2,850
4,300
7,250
10,000
10,000
15,000
1,800
3,400
5,000
8,500
13,500
15,000 19,000
20,000
2,250
3,800
5,500
9,500
15,750
25,000
2,450
4,100
5,700
10,250
17,000
21,000
30,000
2,700
4,500
6,400
10,750
18,000
23,000
35,000
2,900
4,800
6,700
11,500
19,000
24,250
40,000
3,000
5,000
7,250
12,000
19,500
27,000
50,000
3,400
5,250
7,750
13,000
21,000
29,000
60,000
3,600
5,750
8,100
14,000
22,000
30,500
80,000
3,900
6,250
9,000
15,000
24,000
33,000
100,000
4,300
6,750
9,750
16,500
26,000
35,000
150,000
4,500
7,600
11,100
19,000
28,000
38,000
200,000
4,600
8,400
12,250
21,500
30,000
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
General Purpose Fuses
FLNR_ID/FLSR_ID Indicator® Class RK5 Fuses 250/600 VAC • Dual-Element, Time Delay • 1/10 – 600 Amperes
FLNR_ID 100A
FLSR_ID
400A 600A
200A
1000 800
600
600
400
400
300
300
200
200
100 80
100 80
60
60
40
40
30
30
20
20
TIME IN SECONDS
TIME IN SECONDS
General Purpose Fuses
60A 1000 800
10 8 6 4 3 2
1 .8
60A
100A
200A
400A 600A
10 8 6 4 3 2
1 .8
CURRENT IN AMPERES
100000 80000
60000
40000
30000
20000
10000 8000
6000
4000
3000
2000
1000 800
600
400
300
200
100 80
60
40
30
20
10 8
6 5
1000000 800000
600000
400000
300000
200000
100000 80000
60000
40000
30000
20000
.01
10000 8000
.02
.01
6000
.03
.02
4000
.03
3000
.06 .05 .04
2000
.04
1000 800
.1 .08
.06
600
.1 .08
400
.2
300
.3
.2
200
.4
.3
100 80
.6
.4
60 50
.6
CURRENT IN AMPERES
30A
15A
FLSR_ID
FLNR_ID
1000000
1000000
800000
800000
600000
600000 400000
400000
300000
300000 200000
200000 100000
80000
600A
60000
400A 200A
40000 30000
100A 20000 60A 10000 8000 6000 4000 3000 2000
PEAK LET - THRU IN AMPERES
PEAK LET - THRU IN AMPERES
600A
80000
100000
400A
60000 50000
200A
40000 30000
100A
20000
60A
10000
30A
8000 6000 5000
15A
4000 3000 2000
1000
1000
800
800
600
600 400
400
300
300 200
200
200000
100000
80000
60000
40000
30000
20000
10000
8000
6000
4000
3000
2000
1000
800
www.littelfuse.com
600
32
300
200000
100000
80000
60000
40000
30000
20000
10000
8000
6000
4000
3000
2000
1000
800
600
300
400
200
100
AVAILABLE FAULT CURRENT SYMMETRICAL R.M.S. AMPERES
400
200
100
100
100
AVAILABLE FAULT CURRENT SYMMETRICAL R. M. S. AMPERES
© 2005 Littelfuse • POWR-GARD™ Products Catalog
