JTD400 - 400 Amp Fuse

JTD400 - 400 Amp Fuse

A 400A rating is only the first thing to check when you're replacing a fuse. The JTD400 is a 400-amp Class J time-delay fuse with knife-blade construction, designed to meet specific electrical and physical requirements. It carries maximum voltage ratings of 600VAC and 500VDC and uses a Slo-Blo/Time Lag (T)/Time Delay opening characteristic. When matching a JTD400 replacement, check the full specification, not just amperage: fuse class, opening characteristic, AC or DC voltage, interrupting requirements, knife-blade construction, mounting, and non-indicating configuration all matter.

Key Features and Benefits

• 400A continuous current rating for equipment specifically requiring a 400-amp fuse
• Class J fuse configuration provides a clear specification to match against the equipment requirements
• Time-delay opening characteristic, identified as Slo-Blo/Time Lag (T)/Time Delay
• Maximum voltage rating of 600VAC
• Also rated for a maximum of 500VDC
• Knife-blade construction provides an important physical characteristic for replacement matching
• Non-indicating design for equipment requiring this configuration
• Part of the JTD Series
• Identified as part of the POWR-PRO Fuse family
• Designed for mounting in an appropriate fuse block, clip, or holder
• LFJ60400 Series is specified as the PG holder

Technical Specifications

• Catalog Number: JTD400
  
• Series: JTD
  
• Manufacturer Description: FUS 600V T/D CLASS J 400A
  
• Product Type: Class J Time-Delay Fuse
  
• Continuous Current Rating: 400A
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 500VDC
  
• AC Interrupting Value 1: 200,000A at 600VAC
  
• AC Interrupting Value 2: 300,000A at 600VAC
  
• DC Interrupting Rating: 20,000A at 500VDC
  
• Published Interrupting Rating: 20 kA at 500VDC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Fuse Class: Class J
  
• Family Style: POWR-PRO Fuse
  
• Construction / Size: Knife-Blade
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified PG Holder: LFJ60400 Series
  

Material Compliance and Certifications

The supplied product information confirms the JTD400 electrical ratings, Class J designation, time-delay opening characteristic, knife-blade construction, non-indicating configuration, mounting method, and specified holder series.

Where It Works Best

The JTD400 400A Class J time-delay fuse is best suited to electrical equipment specifically designed for a 400A Class J, non-indicating, knife-blade fuse with corresponding time-delay characteristics. For AC service, verify the equipment requirements against the 600VAC maximum rating and the applicable manufacturer-supplied AC interrupting value. For DC service, confirm compatibility with the 500VDC maximum voltage and 20 kA interrupting rating at 500VDC.