Littelfuse NLN020 NLN Series Class K5 Cartridge Fuse, 20A

Littelfuse NLN020 NLN Series Class K5 Cartridge Fuse, 20A

The Littelfuse NLN020 NLN Series Class K5 Cartridge Fuse delivers low-cost, general-purpose overcurrent protection for feeder and branch circuits in residential, commercial, and industrial applications. Rated 250VAC and 250VDC at 20A with a 50,000 ampere interrupting rating, this fast-acting, non-time-delay fuse is packaged in an industrial cartridge format and is engineered to replace Class H fuses, which carry only a 10,000 ampere interrupting rating. NLN Series fuses are best suited to circuits with little or no motor load, including resistive heating loads, where lowest initial cost is the primary consideration.

Key Features

• Ampere Rating: 20A rating sized for general-purpose feeder and branch circuit protection.
• Voltage Rating: Rated 250VAC and 250VDC for use across compatible AC and DC circuits.
• Fast-Acting Opening: Fast-Acting (F) response characteristic for non-time-delay overcurrent protection.
• Class K5, 50,000 A.I.R.: Delivers a 50,000 ampere interrupting rating, a major upgrade over Class H fuses limited to 10,000 amperes.
• Industrial Cartridge Package: Housed in an industrial cartridge form factor for standard fuse holder and clip compatibility.
• Cost-Effective Protection: Engineered for applications where lowest initial cost is the primary consideration.
• Broad Application Range: Suitable for residential and smaller commercial or industrial circuits with little or no motor load, including resistive heating loads.

Certifications & Compliance

• UL Listed (UL File E81895)
• CSA Certified (CSA 1421-01-029862 and CSA 1422-02-029862)
• CE Compliant

Technical Specifications

• VAC (V): 250
• VDC (V): 250
• Ampere Rating (A): 20

Typical Applications

• Residential Feeder and Branch Circuit Protection
• Smaller Commercial and Industrial Electrical Systems
• General-Purpose Circuits with Little or No Motor Load
• Resistive Heating Load Circuits
• Class H Fuse Replacement Upgrades

Why Littelfuse?

Littelfuse backs the NLN Series with UL Listed, CSA Certified, and CE Compliant documentation, giving electrical professionals confidence in code-compliant overcurrent protection. With a 50,000 ampere interrupting rating and fast-acting performance, the NLN020 delivers dependable, cost-effective circuit protection for everyday residential, commercial, and industrial installations.