Littelfuse JTD125 Indicator Fuse 125A 600VAC 500VDC Slo-Blo Time Delay Knife-Blade

The JTD125 from Littelfuse is engineered to provide robust and reliable protection for various electrical applications, including general purpose circuits and motor control centers. With its superior time-delay characteristics, this indicator fuse minimizes nuisance openings and helps reduce inventory by being versatile across different uses. As a key component in UL Listed series-rated molded case circuit breaker panels, it offers exceptional overload and short circuit protection that significantly decreases the risk of equipment damage while ensuring compliance with IEC Type II “No Damage” standards. One of the standout features is its safety-enhancing design; the darkened indicator window provides a clear and immediate visual cue when the fuse has blown, regardless of whether the power is on or off, thereby minimizing the exposure to live circuits and reducing maintenance downtime. With an ampere rating of 125, and operating voltages of up to 600 VAC and 500 VDC, this time delay fuse also supports transformer protection, making it an essential addition for those seeking efficiency and safety in electrical systems.

• Minimizes nuisance fuse openings with time-delay design
• Indicator window provides clear blown fuse status for enhanced safety
• Complies with IEC Type II “No Damage” motor circuit protection standard
• UL Listed and CSA Certified for reliable industrial and general-purpose use
• Compatible with UL Listed series-rated molded case circuit breaker panels
• Dual voltage ratings up to 600 VAC and 500 VDC
• High interrupting rating of 200 kA AC and 20,000 A DC protects against short circuits
• Brass cap with copper blade construction ensures durability and reliable connection
• Melamine body provides electrical insulation and heat resistance
• Suitable for motor control centers, transformers, and general-purpose circuits

• Ampere Rating: 125 A
• Voltage: 600 V AC, 500 V DC
• Interrupting Rating: 20,000 A at 500 V DC, 200 kA AC
• Opening: Slo-Blo / Time Lag / Time Delay
• Material Body: Melamine
• Material Caps: Nickel-plated Bronze (8/10–60 A), Brass (70–200 A), Brass Cap with Copper Blade (225–600 A)
• Certification: UL Listed, CSA Certified, CE and RoHS (225–600 A only)
• Country of Origin: Mexico

Certification

Datasheets