Littelfuse JLLN450 Class T Fuse – 450A – 300V Fast-Acting Current-Limiting Fuse

The Littelfuse JLLN450 is a 450 Amp Class T fast-acting fuse designed for advanced protection in industrial and commercial electrical distribution systems. Part of the JLLN series, this current-limiting fuse provides rapid fault interruption to minimize equipment damage and reduce let-through energy during short-circuit conditions. Its compact knife-blade/bolt-in construction makes it ideal for applications requiring high interrupting capacity, reliable performance, and efficient use of panel space.

Electrical Rating

• Current Rating: 450 Amps
• Maximum AC Voltage: 300 VAC
• Maximum DC Voltage: 125 VDC
• Interrupting Rating:
  • 200 kA AC
  • 20 kA DC @ 125 VDC

Key Specifications

• Manufacturer: Littelfuse
• Catalog Number: JLLN450
• Series: JLLN
• Fuse Class: Class T
• Construction Type: Knife-Blade / Bolt-In
• Fuse Type: Fast-Acting Current-Limiting
• Indicating: No

Protection Characteristics

• Fast-acting operation for rapid fault interruption
• Current-limiting design minimizes fault energy and equipment stress
• Provides superior short-circuit protection
• High interrupting capacity for demanding electrical distribution systems
• Helps protect sensitive electrical and electronic equipment from fault-related damage

Construction Features

• Compact Class T fuse design
• Knife-blade/bolt-in terminal construction
• Non-indicating fuse configuration
• Industrial-duty construction for dependable long-term operation

Mounting & Compatibility

• Mounting Method: Fuse Block / Holder / Bolt-In Mounting
• Compatible with Class T fuse blocks and fuse holders
• Suitable for switchboards, panelboards, UPS systems, battery systems, and industrial distribution equipment

Applications

• Industrial power distribution systems
• UPS and battery backup systems
• Switchboards and panelboards
• Motor control centers
• Current-limiting feeder and branch circuit protection
• Protection of sensitive electrical and electronic equipment

Product Data

• Manufacturer: Littelfuse
• Catalog Number: JLLN450
• Product Type: Fast-Acting Current-Limiting Fuse
• Series: JLLN
• Fuse Class: Class T

Returns are easy

You may return items within 30 days of delivery for a refund.

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