Littelfuse JLLS250 Class T Fuse – 250A – 600V Fast-Acting Current-Limiting Fuse

The Littelfuse JLLS250 is a 250 Amp Class T fast-acting fuse designed to provide superior short-circuit protection in industrial and commercial electrical distribution systems. Part of the JLLS series, this current-limiting fuse responds rapidly to fault conditions, minimizing let-through energy and helping protect electrical equipment from damaging fault currents. Its compact knife-blade/bolt-in construction makes it ideal for applications where high interrupting capacity and space-efficient installation are required.

Electrical Rating

• Current Rating: 250 Amps
• Maximum AC Voltage: 600 VAC
• Maximum DC Voltage: 300 VDC
• Interrupting Rating:
  • 200 kA AC
  • 20 kA DC @ 300 VDC

Key Specifications

• Manufacturer: Littelfuse
• Catalog Number: JLLS250
• Series: JLLS
• 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 reduces let-through current and energy
• Provides exceptional short-circuit protection
• High interrupting capacity for demanding industrial power 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 performance

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: JLLS250
• Product Type: Fast-Acting Current-Limiting Fuse
• Series: JLLS
• Fuse Class: Class T

Returns are easy

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

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