Littelfuse JTD Series POWR-PRO Class J Time-Delay Fuse with Blown-Fuse Indicator, 600V

Littelfuse JTD Series POWR-PRO Class J Time-Delay Fuse with Blown-Fuse Indicator, 600V

The Littelfuse JTD Series POWR-PRO® Class J time-delay fuse delivers true dual-element protection with permanent blown-fuse indication in a compact Industrial Cartridge package. Rated 600VAC/300VDC and UL Listed, this JTD_ID Indicator fuse family is available in ampere ratings from 1.25A to 70A (1.25A, 3A, 4A, 8A, 30A, 60A, and 70A), making it easy to match the right time-delay protection to circuits with high inrush currents. The permanently darkened indicator window pinpoints an open fuse at a glance, reducing troubleshooting time and exposure to live circuits.

Key Features

• Ampere Rating Range: Available in 1.25A, 3A, 4A, 8A, 30A, 60A, and 70A ratings for reliable, code-compliant overcurrent protection across a wide range of circuits.
• Voltage Rating: 600VAC / 300VDC for use across a wide range of industrial power systems.
• Time-Delay Opening: Slo-Blo/Time Lag (T) true dual-element design reduces nuisance fuse opening in circuits with high inrush currents.
• Blown-Fuse Indication: The indicator window darkens permanently once the fuse opens, regardless of power state, for immediate visual troubleshooting without exposure to live circuits.
• Compact Package: Industrial Cartridge package size is designed specifically for Class J circuits where space is at a premium.
• IEC Type II Protection: Delivers IEC Type II "No Damage" protection to IEC and NEMA type motor starters and fused combination motor controllers.
• Reduced Downtime: A glance at the indicating window pinpoints an open fuse immediately, eliminating fuse testing so maintenance personnel can bring the correct replacement without delay.
• Reduced Fuse Inventory: A single JTD Series family spanning 1.25A to 70A lets electrical teams standardize on fewer fuse types while covering a wide range of applications.

Certifications & Compliance

• UL Listed (JDDZ E81895)
• CSA Certified (1422-02 029862)

Technical Specifications

• Series: JTD

Typical Applications

• UL Listed Series-Rated Molded Case Circuit Breaker Panels
• Fused Combination Motor Controllers for IEC Type II Branch-Circuit and Ground-Fault Protection
• Motor Control Centers
• General Purpose Mains, Feeders, and Branch Circuits
• Transformer Protection

Why Littelfuse?

Littelfuse POWR-PRO JTD Series fuses pair a patented true dual-element design with permanent blown-fuse indication, giving electrical professionals fast fault identification and dependable current-limiting protection across ampere ratings from 1.25A to 70A. Backed by UL and CSA certification, the JTD Class J fuse family delivers the safety and reliability that industrial and commercial power distribution systems demand. Its compact Industrial Cartridge construction and permanent blown-fuse indicator help maintenance teams cut troubleshooting time and minimize exposure to live circuits, making it a dependable choice for professional electrical work.