Littelfuse JTD015 Class J Time Delay Fuse 15A 600VAC

Product Description

The LITTELFUSE JTD015 is a 15-amp, Class J time delay fuse rated for 600 VAC and 300 VDC service. It features a dual-element design that tolerates brief motor-start inrush currents without nuisance opening, while still providing fast response to sustained overloads and short-circuit events. The cartridge form factor measures 13/16 inch in diameter and 2-1/4 inches in length. With an AC interrupting rating of 200,000 amps RMS symmetrical, this fuse is suited for branch circuit protection in commercial and industrial power distribution panels. Electricians and panel technicians are the primary installers.

The JTD015 is used in commercial and industrial electrical systems where Class J fuse holders are specified. Typical applications include motor branch circuit protection, transformer primary protection, and panel feeder circuits requiring high interrupting capacity. The time delay characteristic makes it well suited for loads with high startup currents, including HVAC compressors, pumps, and other inductive motor loads. It is also cross-referenced under alternate identifiers LFUJTD15 and LFUJTD015.

Key Features

• Dual-element time delay design tolerates motor inrush without nuisance tripping
• 200,000 amp AC RMS symmetrical interrupting rating for high-fault-current environments
• Rated 600 VAC and 300 VDC for versatile circuit protection
• Cartridge mounting fits standard Class J fuse holders
• Stone sand and granular quartz filler construction for arc suppression
• Compact 13/16 inch diameter by 2-1/4 inch length cartridge form factor

Compatibility

Designed as an OEM-style replacement for Class J cartridge fuse positions rated at 15 amps and 600 VAC in commercial and industrial power distribution equipment.

Installation Notes

Installation must be performed by a qualified electrician in accordance with NEC Article 240 and applicable local codes. Always de-energize and lock out the circuit before replacing any fuse. Use an appropriately rated fuse puller for cartridge fuse removal and confirm the replacement fuse matches the circuit voltage and ampere rating before re-energizing. Never substitute a fuse with a higher ampere rating than the circuit is designed for.