JLLS045 - 45Amp Fuse

JLLS045 - 45Amp Fuse

A fuse might be small, but its specs are crucial. Take the Littelfuse JLLS045, for example—this 45-amp Class T fuse stands out for its fast-acting performance and current-limiting features. Its industrial-grade cartridge construction makes it a reliable choice for maintenance teams, electricians, and anyone who relies on precise equipment specifications. With clear characteristics, it's easy to see if the JLLS045 is the right fit for your needs.

Key Features and Benefits

• 45A continuous current rating: Provides the specified amperage for equipment requiring a 45-amp Class T fuse.
• Fast-acting operation: Littelfuse identifies the JLLS045 with a Fast-Acting (F) opening characteristic.
• Current-limiting design: The manufacturer's family-style specification identifies this fuse as current-limiting.
• Class T configuration: Gives maintenance personnel an important compatibility checkpoint when identifying a replacement fuse.
• 600VAC maximum rating: Suitable for compatible AC equipment operating within the fuse's specified voltage rating.
• 300VDC maximum rating: Provides a defined DC rating for compatible applications.
• Industrial cartridge construction: Provides a specific physical configuration to verify against the existing equipment and fuse holder.
• Non-indicating design: The JLLS045 does not incorporate an indicating function.

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: JLLS045
  
• Series: JLLS
  
• Manufacturer Description: FUS 600V F/A CLASS T 45A
  
• Continuous Current Rating: 45A
  
• Fuse Class: Class T
  
• Opening: Fast-Acting (F)
  
• Family Style: Current Limiting
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 300VDC
  
• AC Interrupting Rating: 200,000A (200 kA) at 600VAC
  
• DC Interrupting Rating: 20,000A (20 kA) at 300VDC
  
• Size / Construction: Industrial Cartridge
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• PG Holder: LFT60060 Series
  

Material Compliance and Certifications

The supplied manufacturer specifications for JLLS045 did not include specific UL, CSA, CE, RoHS, REACH, or other certification or material-compliance information. This should not be interpreted as meaning the fuse lacks a particular approval or compliance status. When an installation requires a specific certification or material standard, confirm the product markings and consult current authoritative manufacturer documentation.

Where It Works Best

The Littelfuse JLLS045 45A fuse is best considered for compatible electrical equipment that specifically calls for a 45-amp, fast-acting, current-limiting Class T fuse with industrial cartridge construction. Its 600VAC/300VDC maximum ratings, along with separately specified AC and DC interrupting capacities, give you concrete electrical characteristics to compare against the requirements of the equipment being serviced. It is also a natural replacement candidate when the equipment documentation specifically identifies JLLS045, provided you confirm all application and mounting requirements.