MJL36700 - 700 Amp Circuit Breaker

MJL36700 - 700 Amp Circuit Breaker

When you’re matching a 700 amp circuit breaker, the catalog number matters, but the real fit comes down to the full electrical and physical specifications. The MJL36700 is a 700A, 3-pole circuit breaker rated for 600VAC at 50/60Hz, equipped with an ET 1.0 basic electronic trip unit and supplied with lugs on both the line and load sides. For maintenance teams, electricians, and buyers working with existing equipment, these specifics make it easier to evaluate the MJL36700 as a form, fit, and functional replacement candidate without relying on amperage alone.

Key Features and Benefits

• 700 Amp, 3-Pole Configuration: Clearly defined electrical configuration makes it easier to compare the MJL36700 with the requirements of existing equipment.
• ET 1.0 Electronic Trip: Uses a basic electronic trip unit with a stated 300–800A long-time pickup adjustment range.
• Magnetic Tripping Current: Specified at 1,400–7,000A, an important trip characteristic to confirm when evaluating application requirements.
• Line and Load Lugs Included: Both sides include lugs, removing any ambiguity about the stated terminal configuration.
• Specified Conductor Range: The AL800M23K terminals accommodate 3 x 3/0 AWG through 3 x 500 kcmil aluminum/copper conductors.
• 80% Continuous Current Rating: The manufacturer specifies an 80% continuous current rating for this breaker.
• Push-to-Trip Function: An integral push-to-trip button provides a straightforward way to trip the breaker manually.

Technical Specifications

• Catalog Number: MJL36700
  
• Product Type: Circuit Breaker
  
• Device Application: Distribution
  
• Rated Current: 700A
  
• Number of Poles: 3
  
• Rated Operational Voltage: 600VAC, 50/60Hz, UL 489
  
• Network Frequency: 50/60Hz
  
• Breaking Capacity Code: J
  
• UL 489 AIR: 100kA @ 240VAC; 65kA @ 480VAC; 25kA @ 600VAC
  
• IEC 60947-2 Icu: 65kA @ 240VAC; 50kA @ 380/415VAC
  
• IEC 60947-2 Ics: 35kA @ 240VAC; 25kA @ 380/415VAC
  
• Trip Unit: ET 1.0
  
• Trip Unit Technology: Basic Electronic
  
• Long-Time Pickup Adjustment Range: 300–800A
  
• Magnetic Tripping Current: 1,400–7,000A
  
• Continuous Current Rating: 80%
  
• Rated Impulse Withstand Voltage (Uimp): 8kV, IEC 60947-2
  
• Rated Insulation Voltage (Ui): 750V, IEC 60947-2
  
• Electrical Connection: Lugs, Line and Load
  
• Circuit Breaker Application: HACR Rated
  
• Height: 12.86 in (326.64 mm)
  
• Width: 8.27 in (210.06 mm)
  
• Depth: 8.05 in (204.47 mm)
  
• Net Weight: 29 lb (13.2 kg)
  

Material Compliance and Certifications

The MJL36700 carries documented UL, CSA, and NOM product certifications and is CE marked. Manufacturer-listed standards include UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2. Additional supplied environmental specifications include an IP40 degree of protection and Pollution Degree 3 per IEC 60947-1. The breaker is also identified as HACR-rated.

Where It Works Best

The MJL36700 700 amp circuit breaker is best evaluated for compatible electrical distribution equipment requiring a 700A, 3-pole, 600VAC breaker with an ET 1.0 electronic trip unit and line-and-load lug connections. The included AL800M23K terminal configuration and stated aluminum/copper conductor range are especially useful when confirming whether an existing installation matches the breaker.