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.
General purpose residential and commercial circuits with little or no
Resistive heating loads.
• For use in applications where lowest initial cost is the major consideration.
• 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
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.
AC: 250 Volts (NLN, NLKP)
600 Volts (NLS)
DC: 250 Volts (NLN)
400 Volts (NLS 35 – 60A)
500 Volts (NLS 8 – 30A)
(NLS 225 – 600A)
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
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)
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)
NLN/NLS: Standard 248-9, Class K5
UL Listed (File No: E81895)
CSA Certified (File No: LR29862)**
**Excludes NLN 15-60A
Standard 248-6, Class H
UL Listed (File No: E81895)
CSA Certified (File No: LR29865)
Meets CSA “Type P” requireents