JD63T250 - 250Amp Trip Unit

JD63T250 - 250Amp Trip Unit

The Siemens JD63T250 is specifically identified by Siemens as a trip unit only (TU ONLY), which is an important distinction when you're matching parts for existing electrical equipment. It carries a 250A rating, has three poles, and is intended for the JD frame. For legacy replacement work, verify the complete specification set rather than choosing by amperage or catalog family alone.

Key Features and Benefits

• 250A, three-pole configuration: Matches equipment calling for this specific amperage and pole count.
• Trip unit only: Siemens identifies the JD63T250 as TU ONLY, helping to distinguish it from a complete molded-case circuit breaker.
• JD frame: Intended for compatible equipment requiring the specified JD-frame arrangement.
• Thermal-magnetic trip unit: Uses the trip technology stated in the Siemens product data.
• Line- and load-side lugs: TA2J6500 lugs are specified on both sides.
• Defined conductor ranges: Accommodates 3/0 AWG–500 kcmil copper and 4/0 AWG–500 kcmil aluminum conductors.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number / MFN: JD63T250
  
• Article Number: US2:JD63T250
  
• Product Line: SENTRON
  
• Product Family: JD6, 25 kAIC, 600VAC
  
• Manufacturer Configuration: Trip Unit Only (TU ONLY)
  
• Frame: JD
  
• Amperage Rating: 250A
  
• Number of Poles: 3
  
• Voltage Rating: 600V
  
• Trip Unit Type: Thermal-magnetic
  
• Interrupting Rating at 600V: 25 kAIC
  
• Interrupting Rating at 480V: 35 kAIC
  
• Line-Side Lugs: TA2J6500
  
• Load-Side Lugs: TA2J6500
  
• Copper Wire Range: 3/0 AWG–500 kcmil
  
• Aluminum Wire Range: 4/0 AWG–500 kcmil
  
• Dimensions: 7.5 in. W x 11 in. H x 4 in. D
  
• Net Weight: 2.2 lb
  
• UPC: 783643213463
  
• Commodity Code: 85363099
  
• Country of Origin: Mexico
  
• Standards: UL 489 / IEC 60947-2
  

Material Compliance and Certifications

Siemens states that the JD63T250 meets UL 489 and IEC 60947-2 standards. The supplied manufacturer information does not separately identify this catalog number as UL Listed, so that additional certification claim should not be assumed.

Where It Works Best

The JD63T250 is suited to compatible existing and legacy JD-frame equipment where the required replacement calls for a 250A, three-pole thermal-magnetic trip unit with the electrical and physical characteristics listed above. Because Siemens identifies this catalog number as TU ONLY, confirm that the application calls for this component rather than assuming it is a complete breaker.