NLN/NLS Class K5 Fuses
250/600 VAC
s
“ONE-TIME”
s
1 – 600 Amperes
SPECIFICATIONS
Voltage ratings:
AC: 250 Volts
600 Volts
DC: 250 Volts
400 Volts
500 Volts
(NLN, NLKP)
(NLS)
(NLN)
(NLS 35 – 60A)
(NLS 8 – 15A)
(NLS 225 – 600A)
600 Volts (NLS 1 – 7A)
(NLS 20 – 30A)
(NLS 70 – 200A)
GENERAL
PURPOSE
FUSES
Interrupting ratings:
AC: 50,000 amperes rms symmetrical (NLN/NLS)
10,000 amperes (NLKP)
DC: 20,000 amperes (NLN/NLS 1 – 60A)
50,000 amperes (NLN/NLS 70 – 600A)
Ampere range:
1– 600 amperes (NLN/NLS)
15 – 60 amperes (NLKP)
Approvals:
NLN/NLS: UL Listed Class K5 per UL 248
(formerly UL 198D)
(File No. E81895)
NLKP: UL Listed Class H (File No. E81895)
NLN**/NLS/NLKP: CSA Certified per Spec No. 59.1
(File No. LR29865)‡
‡ NLKP series fuses meet CSA “Type P”
requirements.
** Excludes NLN 15
–
60A
AMPERE RATINGS
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 residen-
tial and smaller commercial and industrial applications.
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.
However, to obtain the added benefits of time-delay, current-
limitation, and higher interrupting rating, consider the use of
POWR-PRO
®
IDSR Indicator
TM
fuses for circuits between
250 and 600 volts. The user gets all the benefits of time-delay
RK5 fuses plus the added benefits of an indicating fuse that
tells when it has opened. Complete information on these
fuses may be found in the POWR-PRO
®
section of this
catalog. For circuits up to 250 volts, see FLNR fuses in this
section of the catalog.
1
2
3
4
5
6
7
8
10
12
* 15
* 20
* 25
* 30
* 35
* 40
* 45
* 50
* 60
70
80
90
100
110
125
150
175
200
225
250
300
350
400
450
500
600
* NLKP series available only in those amperages preceded
by an asterisk.
Example part number (series & amperage): NLS 125
RECOMMENDED FUSE BLOCKS
LH250 series (for NLN and NLKP series fuses)
LH600 series (for NLS series fuses)
Refer to Fuse Block section of this catalog for additional infor-
mation.
APPLICATIONS
General purpose residential and commercial circuits with little
or no motor load.
Resistive heating loads.
ECONOMICAL
s
For use in applications where lowest initial cost is the major
consideration.
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
TM
IDSR Indicator
TM
fuses and FLNR/FLSR series fuses provide
superior protection for all motor and general purpose circuits
containing inductive loads.
SAFETY
s
50,000 A.I.R., Class K5 — Adequate interrupting capacity
for residences and many smaller facilities.
34
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