MJA36800 - 800 Amp Circuit Breaker

MJA36800 - 800 Amp Circuit Breaker

The MJA36800 is an 800 amp, 3-pole circuit breaker with an ET 1.0 basic electronic trip unit, I-Line line-side connection, and mechanical lugs on the load side. Those details are worth checking together when you're matching a breaker for your existing electrical distribution equipment; amperage alone doesn't tell the whole story. For buyers maintaining existing or legacy equipment, the MJA36800 offers a specific combination of current rating, trip technology, connection configuration, interrupting capacity, and dimensions that can be compared directly with the requirements of the equipment in service.

Key Features and Benefits

• 800 Amp, 3-Pole Configuration: Clearly defined electrical characteristics help simplify comparison with the breaker being replaced and the requirements of the distribution 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 1,600–8,000A.
• I-Line Configuration: The breaker provides an I-Line connection on the line side, with mechanical lugs on the load side.
• 80% Continuous Current Rating: The breaker has a manufacturer-specified 80% continuous current rating and ABC phase connection.
• Conductor Compatibility: The stated conductor range is 3 x 3/0 AWG through 3 x 500 kcmil aluminum/copper.
• Push-to-Trip Design: An integral push-to-trip button lets you manually trip the circuit breaker.

Technical Specifications

• Catalog Number: MJA36800
  
• Product Type: Circuit Breaker
  
• Device Application: Distribution
  
• Rated Current: 800A
  
• 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: 1,600–8,000A
  
• Continuous Current Rating: 80%
  
• Phase Connection: ABC
  
• Rated Impulse Withstand Voltage (Uimp): 8kV
  
• Line-Side Electrical Connection: I-Line Connection
  
• Load-Side Electrical Connection: Lugs
  
• 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 MJA36800 circuit breaker has documented UL, CSA, and NOM product certifications and is CE marked. Listed standards include UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2. The supplied product specifications also identify an IP40 degree of protection, Pollution Degree 3 per IEC 60947-1, and an HACR-rated application designation.

Where It Works Best

The MJA36800 800 amp circuit breaker is best evaluated for compatible electrical distribution equipment requiring an 800A, 3-pole, 600VAC breaker with an I-Line configuration and ET 1.0 electronic trip unit. Its I-Line line-side connection and mechanical load-side lugs are especially important when checking the physical and electrical configuration of existing equipment.