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NLN/NLS Class K5 Fuses
250/600 VAC • “One-Time” • 1 – 600 Amperes
However, to obtain the added benefits of time-delay, current-limitation, and
higher interrupting rating, consider the use of POWR-PRO® FLNR_ID and
FLSR_ID Indicator® fuses for circuits up to 600 volts. The user gets all the
benefits of time-delay RK5 fuses plus the added benefits of an indicating
fuse that shows when it has opened. Complete information on these
fuses may be found in the POWR-PRO fuse section of this catalog. For
circuits up to 250 volts, see FLNR fuses in this section of the catalog.
Applications
General purpose residential and commercial circuits with little or no
motor load.
Resistive heating loads.
Economical
For use in applications where lowest initial cost is the major consideration.
Safety
50,000 A.I.R., Class K5 — Adequate interrupting capacity for
residences and many smaller facilities.
NLN and NLS series fuses provide low cost protection for general purpose
feeder and branch circuits when available short-circuit currents are less
than 50,000 amperes. They replace all Class H fuses which have only a
10,000 ampere interrupting rating. They are suitable for use in many resi-
dential and smaller commercial and industrial applications.
NOTE: NLKP series fuses have limited interrupting rating and should be
used only where available short-circuit current is known to be less than the
fuse interrupting rating. Where available fault current is unknown, where
it exceeds NLN/NLS interrupting rating, or where it may increase in the
future, 200,000 ampere interrupting rating Littelfuse POWR-PRO
FLNR_ID/FLSR_ID Indicator fuses and FLNR/FLSR series fuses provide
superior protection for all motor and general purpose circuits containing
inductive loads.
NLKP series fuses are Canadian “Code” fuses specifically designed to
meet Canadian Electrical Code Type P fuse requirements for residential
use. They have a 10,000 ampere interrupting rating.
Specifications
Voltage Ratings:
Ampere Ratings
AC: 250 Volts (NLN, NLKP)
1
7
*25
*60
125
300
600 Volts (NLS)
2
8
*30
70
150
350
DC: 250 Volts (NLN)
3
10
*35
80
175
400
400 Volts (NLS 35 – 60A)
4
12
*40
90
200
450
500 Volts (NLS 8 – 30A)
5
*15
*45
100
225
500
(NLS 225 – 600A)
6
*20
*50
110
250
600
600 Volts (NLS 1 – 7A)
(NLS 70 – 200A)
* NLKP series available only in those a­perages preceded by an asterisk.
Exa­ple part nu­ber (series & a­perage): NLS 125
Interrupting Ratings:
AC: 50,000 a­peres r­s sy­­etrical (NLN/NLS)
10,000 a­peres (NLKP)
DC: 20,000 a­peres (NLN/NLS 1 – 60A)
Recommended Fuse Blocks
50,000 a­peres (NLN/NLS 70 – 600A)
Ampere Range:
1– 600 a­peres (NLN/NLS)
LH250 series (for NLN and NLKP series fuses)
LH600 series (for NLS series fuses)
Refer to the Blocks & Holders section of this catalog for additional infor­ation.
15 – 60 a­peres (NLKP)
Approvals:
NLN/NLS: Standard 248-9, Class K5
UL Listed (File No: E81895)
CSA Certified (File No: LR29862)**
**Excludes NLN 15-60A
NLKP:
Standard 248-6, Class H
UL Listed (File No: E81895)
CSA Certified (File No: LR29865)
Meets CSA “Type P” require­ents
General Purpose Fuses
NLN/NLS Class K5 Fuses
250/600 VAC • “One-Time” • 1 – 600 Amperes
A
A
E
C
D
C
B
B
F D
G
FIG. 1
FIG. 2
Refer to
Fig. No.
Dimensions In Inches (mm in parentheses)
Amperes
Series
A
B
C
D
E
F
G
1 – 30
1
NLN
NLKP
2 (50.8)
12 (12.7)
12 (12.7)
916 (14.3)
NLS
5 (127.0)
34 (19.1)
58 (15.9)
1316 (20.6)
35 – 60
1
NLN
NLKP
3 (76.2)
34 (19.1)
58 (15.9)
1316 (20.6)
NLS
5 12 (139.7)
1 (25.4)
58 (15.9)
1116 (27.0)
70 – 100
2
NLN
578 (149.2)
1 (25.4)
1 (25.4)
1116 (27.0)
18 (3.2)
34 (19.1)
1516 (33.3)
NLS
778 (200.0)
114 (31.8)
1 (25.4)
1516 (33.3)
18 (3.2)
34 (19.1)
1916 (39.7)
110 – 200
2
NLN
718 (181.0)
112 (38.1)
138 (34.9)
1916 (39.7)
316 (4.8)
118 (28.6)
178 (47.6)
NLS
9 58 (244.5)
134 (44.5)
138 (34.9)
12732 (46.8)
316 (4.8)
118 (28.6)
2332 (53.2)
225 – 400
2
NLN
8 58 (219.1)
2 (50.8)
178 (47.6)
2332 (53.2)
14 (6.4)
158 (41.3)
21332 (61.1)
NLS
11 58 (295.3)
212 (63.5)
178 (47.6)
21932 (65.9)
14 (6.4)
158 (41.3)
2 78 (73.0)
450 – 600
2
NLN
10 38 (263.5)
212 (63.5)
214 (57.2)
21932 (65.9)
14 (6.4)
2 (50.8)
2 78 (73.0)
NLS
13 38 (339.7)
3 (76.2)
214 (57.2)
3332 (78.6)
14 (6.4)
2 (50.8)
3716 (87.3)
NLN
NLS
1000
1000
800
800
600
600
400
400
300
300
200
200
100
100
80
80
60
60
40
40
30
30
20
20
10
10
8
8
6
6
4
4
3
3
2
2
1
1
.8
.8
.6
.6
.4
.4
.3
.3
.2
.2
.1
.1
.08
.08
.06
.06
.04
.04
.03
.03
.02
.02
.01
.01
CURRENT IN AMPERES
CURRENT IN AMPERES
© 2005 Littelfuse POWR-GARD Products Catalog
.05