MD63B500L - 500Amp Circuit Breaker

MD63B500L - 500Amp Circuit Breaker

The MD63B500L combines the electrical and physical details you need when matching a breaker to an existing system. This 500 amp, 3-pole MD6 molded case circuit breaker uses a thermal-magnetic trip unit, carries a 600VAC rating, and has interrupting ratings of 25kAIC at 600V and 50kAIC at 480V. Those details give buyers and electrical professionals concrete specifications to compare against the breaker and equipment already in place. When the MD6 frame requirements, ratings, trip configuration, lug arrangement, conductor range, and dimensions match the application, the MD63B500L can be considered a form, fit, and functional replacement candidate.

Key Features and Benefits

• 500A, 3-Pole Rating: Provides a clear electrical configuration for matching existing equipment requirements.
• Thermal-Magnetic Protection: The MD63B500L uses the specified thermal-magnetic trip unit found in this breaker configuration.
• 600VAC Rating: Suitable for compatible equipment requiring a breaker with the supplied 600VAC voltage rating.
• MD6 Family: The MD6 designation helps identify the correct frame and breaker configuration for replacement work.
• Lugs on Both Sides: TA3K500 includes line- and load-side lugs, eliminating guesswork about the supplied lug arrangement.
• Cu/Al Conductor Range: The lugs accept 1/0 AWG–500 kcmil copper or aluminum conductors, according to the supplied specifications.

Technical Specifications

• Catalog Number: MD63B500L
  
• Article Number: US2\:MD63B500L
  
• Product Type: Molded Case Circuit Breaker
  
• Product Family: MD6, 25KAIC, 600VAC
  
• Frame: MD
  
• Amperes: 500A
  
• Poles: 3
  
• Voltage Rating: 600VAC
  
• A.I.C. Rating at 600V: 25kAIC
  
• A.I.C. Rating at 480V: 50kAIC
  
• Trip Unit: Thermal-Magnetic
  
• Temperature Rating: Standard 40°C breaker
  
• Lug Configuration: Line- and load-side lugs included
  
• Lug Type: TA3K500
  
• Wire Range: 1/0 AWG–500 kcmil
  
• Conductor Compatibility: Copper/Aluminum (Cu/Al)
  
• Width: 9 in.
  
• Height: 16 in.
  
• Depth: 6 in.
  
• Dimensions: 9"W x 16"H x 6"D
  
• Net Weight: 61.619 lbs.
  
• UPC: 783643011724
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The supplied product documentation states that the MD63B500L meets UL 489 and IEC 60947-2 standards. For replacement applications that require a specific standard, check these details along with the electrical ratings and equipment requirements.

For conductor connections, the breaker includes TA3K500 line- and load-side lugs with a stated 1/0 AWG–500 kcmil wire range for copper or aluminum conductors.

Where It Works Best

The MD63B500L 500 amp circuit breaker is best suited for compatible existing or legacy electrical equipment that requires an MD6/MD frame, 3-pole molded case breaker with a thermal-magnetic trip unit. The electrical application should match its 600VAC rating, including the applicable interrupting rating of 25kAIC at 600V or 50kAIC at 480V.

Connection details deserve just as much attention as amperage. The MD63B500L includes TA3K500 lugs on both the line and load sides, with a specified conductor range of 1/0 AWG through 500 kcmil Cu/Al. The available equipment space should also correspond with the breaker's 9"W x 16"H x 6"D dimensions.