JTD125 - 125 Amp Fuse

JTD125 - 125 Amp Fuse

A 125A rating may be the first thing you check when replacing a fuse, but it shouldn't be the last. The JTD125 is a 125-amp Class J time-delay fuse with Slo-Blo/Time Lag (T)/Time Delay operation, knife-blade construction, and maximum ratings of 600VAC and 500VDC. It belongs to the JTD Series and is identified as a POWR-PRO Fuse. When you're checking it against an existing fuse or equipment specification, don't stop at "125 amps." Fuse class, opening characteristic, AC or DC voltage, applicable interrupting rating, blade construction, and mounting compatibility all deserve a look before you decide you've found the right match.

Key Features and Benefits

• 125A continuous current rating for equipment requiring a 125-amp fuse
• Class J configuration provides a specific fuse-class requirement to verify during replacement
• Time-delay operation identified by the manufacturer as Slo-Blo/Time Lag (T)/Time Delay
• Maximum 600VAC rating
• Maximum 500VDC rating
• Knife-blade construction for installations designed around this physical fuse format
• Non-indicating design—an important detail when comparing JTD variants
• Part of the JTD Series
• Identified within the POWR-PRO Fuse family
• Designed for mounting with a compatible fuse block, clip, or holder
• LFJ60200 Series is the specified holder family

Technical Specifications

• Catalog Number: JTD125
  
• Series: JTD
  
• Product Type: Class J Time-Delay Fuse
  
• Continuous Current Rating: 125A
  
• Fuse Class: Class J
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• 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
  
• Size / Construction: Knife-Blade
  
• Family Style: POWR-PRO Fuse
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder Series: LFJ60200 Series
  

Material Compliance and Certifications

The supplied product data confirms the JTD125's Class J designation, 125A continuous current rating, time-delay opening characteristic, 600VAC and 500VDC maximum voltage ratings, supplied interrupting values, knife-blade construction, non-indicating configuration, and mounting method.

Where It Works Best

The JTD125 125A Class J fuse suits electrical equipment designed for a 125A, Class J, time-delay, knife-blade fuse with matching electrical requirements. For AC service, verify the installation against the 600VAC maximum rating and the applicable AC interrupting value. For DC service, confirm the equipment requirements match the 500VDC maximum rating and the 20 kA interrupting rating at 500VDC.