JTD250 - 250 Amp Fuse

JTD250 - 250 Amp Fuse

The JTD250 is a 250A Class J time-delay fuse for electrical equipment that requires this combination of amperage, voltage, opening characteristic, and physical configuration. Part of the JTD Series and identified within the POWR-PRO Fuse family, it features knife-blade construction and a Slo-Blo/Time Lag (T)/Time Delay opening characteristic. This is a non-indicating fuse, so check this detail along with the electrical ratings when replacing an existing fuse. A 250A rating may be the first thing you notice. Still, it shouldn't be the only thing you match—Class J requirements, time-delay operation, voltage, interrupting ratings, knife-blade format, and holder compatibility all deserve a careful check.

Key Features and Benefits

• 250A continuous current rating for equipment requiring a 250-amp fuse
• Class J configuration provides a clearly defined fuse class for compatibility checks
• Time-delay opening characteristic, specified as Slo-Blo/Time Lag (T)/Time Delay
• Maximum voltage rating of 600VAC
• Maximum DC voltage rating of 500VDC
• Knife-blade construction makes the physical format straightforward to verify against the existing fuse and equipment
• Part of the JTD Series
• Identified as a POWR-PRO Fuse family product
• Non-indicating design for equipment specifications that call for this configuration
• Mounting method is specified as fuse block, clip, or holder
• LFJ60400 Series is the specified holder family

Technical Specifications

• Catalog Number: JTD250
  
• Series: JTD
  
• Manufacturer Description: FUS 600V T/D CLASS J 250A
  
• Product Type: Class J Time-Delay Fuse
  
• Continuous Current Rating: 250A
  
• 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
  
• Construction / Size: Knife-Blade
  
• Family Style: POWR-PRO Fuse
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder Series: LFJ60400 Series
  

Material Compliance and Certifications

The supplied manufacturer information confirms the JTD250's Class J designation, 250A current rating, voltage and interrupting specifications, time-delay opening characteristic, knife-blade construction, non-indicating configuration, and mounting information.

Where It Works Best

The JTD250 suits electrical equipment designed for a 250A Class J time-delay, non-indicating fuse with matching electrical and physical requirements. For AC service, verify the equipment specification against the fuse's 600VAC maximum rating and the applicable supplied AC interrupting value. For DC service, confirm compatibility with its 500VDC maximum rating and 20 kA interrupting rating at 500VDC.