MD63B600 - 600Amp Circuit Breaker

MD63B600 - 600Amp Circuit Breaker

When you're matching a 600 amp circuit breaker for existing equipment, the catalog number helps, but the electrical ratings, frame, lugs, and physical size determine whether you've found the right fit. The MD63B600 is a 600A, 3-pole MD6 molded case circuit breaker with a thermal-magnetic trip unit and a 600VAC rating. When the MD frame, 600A rating, three-pole configuration, voltage and interrupting ratings, thermal-magnetic trip, load-side lug arrangement, conductor range, and dimensions all match the application, the MD63B600 can be considered a form, fit, and functional replacement candidate. Its solid molded-case construction is built to last when selected, installed, and maintained correctly.

Key Features and Benefits

• 600A, 3-Pole Configuration: Clearly defined amperage and pole count make it easier to compare the MD63B600 with the breaker being replaced.
• Thermal-Magnetic Trip Unit: Uses the specified thermal-magnetic trip configuration for compatible MD-frame applications.
• 600VAC Rating: Rated for applications requiring a breaker with the supplied 600VAC voltage rating.
• MD6 / MD Frame: Frame and product-family identification provide another important reference point when evaluating replacement compatibility.
• Load-Side Lugs Included: This version comes with TA3K500 load-side lugs.
• 1/0 AWG–500 kcmil Wire Range: The supplied TA3K500 lugs accommodate the stated range for copper or aluminum conductors.

Technical Specifications

• Catalog Number: MD63B600
  
• Article Number: US2\:MD63B600
  
• Product Type: Molded Case Circuit Breaker
  
• Product Family: MD6, 25KAIC, 600VAC
  
• Frame: MD
  
• Amperes: 600A
  
• 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
  
• Breaking Capacity: Standard breaking capacity
  
• Included Lugs: Load-side lugs
  
• 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: 0.022 lb., as listed in the supplied product data
  
• UPC: 783643214460
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The supplied documentation states that the MD63B600 meets UL 489 and IEC 60947-2 standards. These specifications help confirm whether the replacement application requires particular circuit-breaker standards.

The included TA3K500 load-side lugs have a stated 1/0 AWG–500 kcmil conductor range and are identified for copper or aluminum (Cu/Al) conductors.

Where It Works Best

The MD63B600 600 amp circuit breaker is best considered for compatible existing or legacy electrical equipment requiring an MD-frame, 3-pole molded case circuit breaker with thermal-magnetic operation. Start with the 600A rating and 600VAC rating, then match the applicable interrupting capacity: 25kAIC at 600V and 50kAIC at 480V.

The connection configuration is particularly important with this catalog number. The MD63B600 is supplied with TA3K500 load-side lugs, rated for 1/0 AWG through 500 kcmil copper or aluminum conductors.