JLLN040 - 40Amp Fuse

JLLN040 - 40Amp Fuse

The Littelfuse JLLN040 is an ideal Class T fuse with a 40-amp rating, featuring fast-acting operation and a current-limiting design suitable for industrial use. It supports up to 300VAC or 160VDC, with interrupting capacities of 200 kA at 300VAC and 20 kA at 160VDC. For your electricians and maintenance teams, it's a reliable choice that combines essential specs into a durable component designed for long-lasting performance.

Key Features and Benefits

• 40A continuous current rating — Provides an exact amperage specification to compare with equipment requirements.
• Class T construction — Designed for equipment requiring the physical and electrical characteristics of a Class T fuse.
• Fast-acting (F) opening characteristic — Littelfuse specifically identifies the JLLN040 as fast-acting, an important characteristic to confirm when selecting a replacement.
• Current-limiting design — Provides the current-limiting characteristic specified for the JLLN family.
• 300VAC maximum voltage rating — Supports compatible AC applications operating within the stated electrical limits.
• 160VDC maximum voltage rating — Also rated for compatible DC applications within the specified limits.
• Non-indicating fuse — Useful when the equipment specification specifically calls for a non-indicating Class T fuse.

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: JLLN040
  
• Series: JLLN
  
• Manufacturer Description: FUS 300V F/A CLASS T 40A
  
• Product Type: Fuse
  
• Continuous Current Rating: 40A
  
• Fuse Class: Class T
  
• Opening Characteristic: Fast-Acting (F)
  
• Family Style: Current Limiting
  
• Maximum AC Voltage: 300VAC
  
• AC Interrupting Rating: 200,000A (200 kA) at 300VAC
  
• Maximum DC Voltage: 160VDC
  
• DC Interrupting Rating: 20,000A (20 kA) at 160VDC
  
• Size / Construction: Industrial Cartridge
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• PG Holder: LFT30060 Series
  

Material Compliance and Certifications

The supplied manufacturer specifications do not state specific UL, CSA, CE, RoHS, REACH, or other material-compliance or certification information for the JLLN040. This should not be interpreted to mean the fuse lacks a particular approval or compliance status. When a listing, certification, or material standard is required for the installation, verify it against the markings and authoritative documentation for the exact Littelfuse JLLN040 catalog number.

Where It Works Best

The JLLN040 40A Class T fuse is best considered for compatible equipment that specifically requires a 40A, fast-acting, current-limiting industrial cartridge fuse with the electrical characteristics listed above. Its dual AC/DC ratings make the application check especially important: for AC service, verify the requirement against 300VAC maximum and 200 kA at 300VAC; for DC service, check against 160VDC maximum and 20 kA at 160VDC.