MD63B600L - 600Amp Circuit Breaker

MD63B600L - 600Amp Circuit Breaker

The MD63B600L is a 600-amp, 3-pole circuit breaker with a thermal-magnetic trip unit. Its "L" version includes TA3K500 lugs on both the line and load sides, making it ideal for replacement tasks. When you're replacing an older model, match the MD frame, amperage, pole count, voltage, interrupting ratings, trip configuration, lugs, conductor range, and physical dimensions. If everything checks out, the MD63B600L is a great replacement for compatible equipment.

Key Features and Benefits

• 600 Amp, 3-Pole Configuration: Clearly defined electrical ratings help narrow replacement selection to equipment calling for this specific amperage and pole count.
• Thermal-Magnetic Trip Unit: The MD63B600L uses the specified thermal-magnetic trip configuration found in this MD-frame breaker.
• 600VAC Rating: Suitable for compatible equipment requiring the supplied 600VAC breaker rating.
• Line and Load Lugs Included: Unlike configurations supplied with load-side lugs only, the MD63B600L includes TA3K500 lugs on both the line and load sides.
• Copper or Aluminum Conductors: The supplied TA3K500 lugs have a stated 1/0 AWG–500 kcmil Cu/Al wire range.
• Standard 40°C MD Frame: The supplied specifications identify this as a standard 40°C MD-frame breaker with standard breaking capacity.

Technical Specifications

• Catalog Number: MD63B600L
  
• Article Number: US2\:MD63B600L
  
• 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: Line- and 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: 61.619 lb.
  
• UPC: 783643011731
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The supplied product documentation states that the MD63B600L meets UL 489 and IEC 60947-2 standards. For electrical equipment where a particular standard is part of the replacement criteria, check these details along with the breaker ratings and configuration.

The breaker includes TA3K500 line- and load-side lugs with a stated conductor range of 1/0 AWG through 500 kcmil for copper or aluminum conductors.

Where It Works Best

The MD63B600L 600 amp circuit breaker is best considered for compatible existing or legacy electrical equipment that calls for a 3-pole MD-frame molded case circuit breaker with thermal-magnetic operation. Start with the basic electrical match: 600A, three poles, 600VAC, 25kAIC at 600V, and 50kAIC at 480V.

Then look closely at the connections. This particular MD63B600L configuration includes TA3K500 lugs on both the line and load sides, with a specified 1/0 AWG–500 kcmil Cu/Al conductor range. That detail helps distinguish it from otherwise similar breaker configurations that may have a different lug arrangement.