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

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.