Littelfuse JTD300 Indicator Fuse 300A 600VAC Slo-Blo Time Delay 20000A@500VDC Knife-Blade

The JTD Series indicator fuses from Littelfuse are engineered to enhance the safety and efficiency of motor control centers across a variety of applications. Featuring superior performance characteristics, these indicator fuses minimize the need for extensive fuse inventory by accommodating numerous applications, significantly reducing downtime due to their intuitive design. A quick glance at the indicating window reveals the status of the fuse—if it darkens, it signals a blown fuse, allowing machine operators to promptly inform maintenance teams without the need for testing. In addition to offering reliable overload and short-circuit protection, these fuses also incorporate IEC Type II "No Damage" protection, safeguarding motor starters and reducing the risk of equipment damage during operation. Adaptable for general purpose circuits, including mains, feeders, and branch circuits where space constraints exist, the JTD Series enhances operational safety by limiting exposure to live circuits, a crucial feature for reducing accidents in industrial settings.

• UL Listed and CSA Certified for safety and compliance
• Improves safety by minimizing exposure to live circuits
• Indicator window darkens visibly to show blown fuse status
• IEC Type II "No Damage" protection for motor starters
• Time delay (Slo-Blo) opening type for motor starting applications
• Current limiting design reduces damage from short-circuits
• Knife-blade design for secure, easy installation
• Melamine body with nickel-plated bronze and brass caps for electrical insulation and durability
• Reduces fuse inventory by covering multiple application types
• Suitable for general purpose circuits including mains, feeders, and branch circuits where space is limited

• Amperage: 300A
• Voltage: 600 VAC, 500 VDC
• Interrupting Rating: 20,000 A at 500 VDC, 200 kA AC (UL)
• Opening Type: Slo-Blo/Time Delay (T)
• Package Size: Knife-Blade
• Material Body: Melamine
• Material Caps: Nickel-plated Bronze, Brass, Brass with Copper Blade
• Applicable Standards: UL 248-8 Class J
• Compliance: UL Listed, CSA Certified, CE (225–600A), RoHS (225–600A)
• Time Delay: Yes
• Current Limiting: Yes
• Dimensions (1-30 A): 2 1/4 in x 1/2 in x 13/16 in (57.2 mm x 12.7 mm x 20.6 mm)
• Dimensions (35-60 A): 2 1/2 in x 5/8 in x 1 1/16 in (60.3 mm x 15.9 mm x 27.0 mm)
• Dimensions (70-100 A): 2 5/8 in x 3 17/32 in x 3 3/4 in x 4 1/2 in x 1 1/8 in x 3/4 in x 9/32 in x 1/8 in (66.7 mm x 89.7 mm x 94.5 mm x 117.5 mm x 28.6 mm x 19.1 mm x 7.1 mm x 3.2 mm)
• Country of Origin: Mexico
• Series: JTD_ID Indicator

Certification

Datasheets