Littelfuse JTD250 Indicator Fuse 250A 600VAC 500VDC Time Delay Knife-Blade

The JTD250 from Littelfuse is an advanced indicator fuse designed to enhance safety and efficiency in various electrical applications. This robust fuse offers exceptional overload and short-circuit protection, which not only safeguards equipment but also meets IEC Type II “No Damage” standards suitable for both IEC and NEMA type motor starters. Its superior time-delay characteristics reduce nuisance openings, making it an ideal choice for general-purpose circuits and motor control centers, all while minimizing the need for a large inventory of fuses. Safety is paramount with the JTD250; its innovative design ensures that once the indicator window darkens, it remains so regardless of whether the power is on or off. This feature significantly reduces the risks associated with live circuits, allowing personnel to quickly identify blown fuses without the need for testing. Furthermore, its easy visibility simplifies maintenance procedures by enabling operators to instantly detect an open fuse, thus reducing downtime and helping teams respond promptly to maintenance needs. With a high interrupting rating and compatibility across various applications, the JTD Series fuse embodies reliability and performance for modern electrical systems.

• Indicator window remains dark after fuse operation for enhanced safety
• Time-delay design reduces nuisance fuse openings
• Meets IEC Type II “No Damage” protection for motor circuit components
• High interrupting rating supports 20,000 A @ 500 V DC and 200 kA AC
• Compatible with IEC and NEMA type motor starters
• Simplifies maintenance with quick visual fuse status indication
• Suitable for general purpose circuits and motor control centers
• Nickel-plated bronze and brass caps provide reliable electrical connections
• UL Listed and CSA Certified for safety assurance
• RoHS and CE compliant for environmental standards (225–600 A range)

• Voltage: 600 V AC, 500 V DC
• Ampere Rating: 250 A
• Interrupting Rating: 20,000 A @ 500 V DC, 200 kA rms symmetrical AC
• Opening: Slo-Blo/Time Lag (T)/Time Delay
• Material Body: Melamine
• Material Caps: Nickel-plated Bronze, Brass, Brass with Copper Blade (by amp rating)
• Applicable Standards: UL 248-8, Class J
• Compliance: UL Listed, CSA Certified, CE, RoHS (CE and RoHS for 225–600 A only)
• Fuse Weight: 0.084–3.120 lb (38.1–1415.2 g)
• Dimensions A (1–30 A): 2 1/4 in (57.2 mm)
• Dimensions C (1–30 A): 1/2 in (12.7 mm)
• Dimensions D (1–30 A): 13/16 in (20.6 mm)
• Country of Origin: Mexico

Certification

Datasheets