JDA36250 - 250 Amp Circuit Breaker

JDA36250 - 250 Amp Circuit Breaker

The JDA36250 has a fairly specific connection arrangement: I-Line on the line side and an AL250JD mechanical lug on the load side. That makes the termination setup an important checkpoint when you're matching this breaker to equipment already in service. Rated 250A with three poles, it uses a thermal-magnetic trip unit for overload and short-circuit protection and carries an 80% continuous current rating. The JDA36250 is built to last, but the right replacement still comes down to making sure the ratings, connections, dimensions, and mounting arrangement match the existing installation.

Key Features and Benefits

• 250A, 3-pole design: Matches equipment requiring this specific current rating and pole arrangement.
• Thermal-magnetic protection: Provides both overload and short-circuit protection.
• I-Line construction: Uses an I-Line connection on the line side with bracket mounting.
• AL250JD load-side lug: Accepts 3/0 AWG to 350 kcmil copper or aluminum conductors.
• ABC phase connection: Uses the manufacturer-specified ABC phase arrangement.
• Push-to-trip button: Provides a built-in means of manually tripping the breaker.
  

Technical Specifications

• Catalog Number: JDA36250
  
• Product Family: PowerPacT J
  
• Product Type: Circuit breaker
  
• Device Application: Distribution
  
• Rated Current: 250A
  
• Number of Poles: 3
  
• Phase Connection: ABC
  
• Trip Unit: Thermal-magnetic
  
• Protection: Overload and short-circuit
  
• Control Type: Toggle
  
• Continuous Current Rating: 80%
  
• Breaking Capacity Code: D
  
• Breaking Capacity at 240VAC: 25 kA
  
• Breaking Capacity at 480VAC: 18 kA
  
• Breaking Capacity at 600VAC: 14 kA
  
• Breaking Capacity at 250VDC: 20 kA
  
• Rated Operational Voltage: 600VAC
  
• Line-Side Connection: I-Line
  
• Load-Side Connection: Mechanical lug
  
• HACR Rated: Yes
  
• Suitability for Isolation: Yes, IEC 60947-2
  
• Height: 7.5 in. (191 mm)
  
• Width: 4.09 in. (104 mm)
  
• Depth: 3.4 in. (86 mm)
  
• Net Weight: 5.3 lb (2.4 kg)
  

Material Compliance and Certifications

The JDA36250 carries manufacturer-specified UL, CSA, and NOM certifications and is CE marked. Applicable standards identified in the manufacturer data include UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2. The breaker is also specified as suitable for isolation in accordance with IEC 60947-2. Its front cover is rated IP40, with Pollution Degree 3 specified under IEC 60947-1.

Where It Works Best

The JDA36250 belongs in compatible existing and legacy I-Line equipment where the original requirements call for a 250A, three-pole J-frame breaker with thermal-magnetic protection. The I-Line line-side connection is a particularly important detail here; this isn't something to select on amperage alone.