Littelfuse NLS Series Class K5...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$13.89
Littelfuse NLS Series Class K5 Fast-Acting Cartridge Fuse, 600V/500VDC

Littelfuse NLS Series Class K5 Fast-Acting Cartridge Fuse, 600V/500VDC

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Model: NLS007

In Stock (leaves warehouse same day if ordered before 3pm ET)

$13.89
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Littelfuse NLS Series Class K5 Fast-Acting Cartridge Fuse, 600V/500VDC

The Littelfuse NLS Series is a Class K5 cartridge fuse family rated 600VAC/500VDC, available in ampere ratings from 7A to 10A for general-purpose feeder and branch circuit protection. Engineered as an economical replacement for Class H fuses, which carry only a 10,000 ampere interrupting rating, the NLS Series delivers a 50,000 A.I.R. Class K5 interrupting rating suited to residential and smaller commercial and industrial applications where available short-circuit currents are less than 50,000 amperes. Housed in a compact Industrial Cartridge package, this fast-acting fuse family offers a low-cost overcurrent protection solution where lowest initial cost is the primary consideration.

Key Features

  • Ampere Rating: Available in 7A to 10A ratings sized for general-purpose feeder and branch circuit protection.
  • Dual Voltage Rating: Rated 600VAC and 500VDC for use across residential and commercial circuit applications.
  • Fast-Acting Opening: Fast-Acting (F) opening characteristic responds quickly to short-circuit and overcurrent conditions.
  • High Interrupting Capacity: 50,000 A.I.R. Class K5 rating (20,000A@500VDC) provides adequate interrupting capacity for residences and many smaller facilities.
  • Class H Replacement: Directly replaces Class H fuses, which have only a 10,000 ampere interrupting rating.
  • Industrial Cartridge Package: Compact cartridge fuse body simplifies installation in standard fuse holders and disconnects.
  • Economical Design: Engineered for applications where lowest initial cost is the major consideration.

Certifications & Compliance

  • UL Listed (UL JDDZ E81895)
  • CSA Certified (CSA 1421-01-029862-0-000 and CSA 1422-02-029862)
  • CE Marked per Littelfuse NLS Series documentation

Technical Specifications

  • Series: NLS

Typical Applications

  • General-Purpose Residential and Commercial Circuits
  • Feeder and Branch Circuit Protection
  • Resistive Heating Loads
  • Smaller Industrial Facilities
  • Panelboard and Load Center Circuit Protection

Why Littelfuse?

Littelfuse NLS Series fuses combine UL Listed and CSA Certified performance with a Class K5, 50,000 A.I.R. interrupting rating to deliver dependable, code-compliant overcurrent protection across the 7A to 10A range. Backed by decades of circuit protection expertise, the NLS Series gives electrical professionals an economical, fast-acting fuse family that upgrades legacy Class H installations without sacrificing reliability.

Product Specs

Series:
NLS
Listing:
UL Listed
Product Type:
Fast-Acting Fuse
Voltage Rating:
600VAC/500VDC
Standards:
CSA Certified
Grade:
K5
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuses

Littelfuse NLS007 – Frequently Asked Questions

1) Can a Littelfuse NLS fuse replace a Class H fuse in an existing disconnect?
That is what the NLS Series is built for. It's an economical Class K5 replacement for Class H fuses, and the jump matters electrically: Class H carries only a 10,000 ampere interrupting rating, while the NLS delivers 50,000 A.I.R. Same industrial cartridge body, so it drops into standard fuse holders and disconnects.
2) What amp ratings does the Littelfuse NLS Series come in?
Two ratings in this NLS family: 7A (NLS007) and 10A (NLS010). Both are sized for general-purpose feeder and branch circuit protection. If your circuit calls for something above 10A, you need a different fuse family.
3) Can the NLS fuse be used on a DC circuit?
Yes. The NLS is dual rated 600VAC and 500VDC. Note the interrupting capacity differs by system: 50,000 A.I.R. on AC and 20,000A at 500VDC.
4) Is a 50,000 A.I.R. Class K5 fuse enough for my building?
It covers any location where the available short-circuit current is less than 50,000 amperes, which takes in residences and most smaller commercial and industrial facilities. If your service study shows fault current above 50kA at the fuse location, you need a higher interrupting class instead.
5) Is the Littelfuse NLS fast-acting or time-delay?
Fast-acting (F) opening characteristic. It responds quickly to overcurrent and short-circuit conditions, which suits resistive heating loads and general-purpose circuits. For motor starting or other high inrush loads, a time-delay fuse is the better choice since a fast-acting element can open on normal inrush.
6) Are Littelfuse NLS fuses UL Listed and CSA approved for an institutional spec?
Both. The NLS Series is UL Listed under UL JDDZ E81895 and CSA Certified under CSA 1421-01-029862-0-000 and CSA 1422-02-029862, with CE marking per Littelfuse NLS documentation. That covers the typical approval language on US and Canadian panelboard specs.
7) Which NLS part number do I order for a 7 amp circuit?
NLS007 is the 7 amp fuse; NLS010 is the 10 amp. The amp rating is the only thing you select on this family, so quote by that part number and you have the full ordering spec.
8) When should I pick a Class K5 fuse over a Class RK5 or Class J?
Class K5 like the NLS is the low initial cost option for general-purpose feeder and branch protection where fault current stays under 50kA. It is not rejection-style, so it mounts in the same industrial cartridge holders as Class H. Where a spec calls for current limiting, rejection clips, or higher interrupting capacity, a Class RK5 or Class J fuse is the correct substitution, not this one.
How fast can I get the Littelfuse NLS007 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Littelfuse NLS007 come with a warranty?
Absolutely. The Littelfuse NLS007 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Littelfuse NLS007?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Littelfuse NLS007 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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