MJL36800 - 800 Amp Circuit Breaker

MJL36800 - 800 Amp Circuit Breaker

Meet the competent MJL36800 molded-case circuit breaker from Schneider Electric’s PowerPact M (M-Frame) line — a heavy-duty protection solution engineered to keep commercial and industrial electrical systems safe, efficient, and dependable. With a full 800-amp current rating, 3-pole design, 600 VAC voltage rating, and 25 kA interrupting capacity, this unit confidently handles demanding workloads. The built-in ET 1.0 electronic trip unit delivers precise, adjustable protection, and the unit-mount format with line-side and load-side lugs ensures streamlined installation and maintenance. Whether you’re specifying new infrastructure or retrofitting existing distribution panels, the MJL36800 gives you high-capacity performance with flexible protection and industry-grade standards of safety and compliance.

Key Features and Benefits

• High capacity and performance: Rated at 800 A and 25 kA interrupting capacity at 600 VAC, the MJL36800 is designed for heavy-duty service and provides robust fault-clearing capability in challenging electrical environments.
• Advanced protection features: The ET 1.0 electronic trip unit offers adjustable long-time, short-time, and instantaneous trip settings, enabling tailored protection for your loads and better monitoring for system management.
• Versatile and dependable: Built for 3-pole, 600 VAC service, with unit-mount lugs on both line and load sides to simplify wiring and installation. Compatible with 3/0 AWG to 500 kcmil aluminum or copper conductors.
• Installation-friendly design: Common mounting holes and handle locations permit streamlined replacement of existing breakers or upgrades in panels with minimal downtime.
• Reduced downtime and improved safety: By delivering a dependable fault-interruption capacity and electronic trip flexibility, this breaker helps keep critical systems online and reduces the risk of major fault damage.

Technical Specifications

• Current Rating: 800 Amperes
• Poles: 3-pole
• Voltage Rating: 600 V AC 50/60 Hz
• Interrupting Capacity:
  • Code “J” – 25 kA at 600 V AC (also 65 kA at 480 V and 100 kA at 240 V) per manufacturer data.
• Trip Unit: ET 1.0 electronic basic trip unit with adjustable long-time pickup 300…800 A; magnetic trip 1,600…8,000 A.
• Construction: Unit-mount format with lugs on both line and load sides for easy wiring.
• Dimensions:
  • Height: 12.86 in (326.6 mm)
  • Width: 8.27 in (210.1 mm)
  • Depth: 8.05 in (204.5 mm)
  • Weight: 29 lb (13.15 kg)
• Ambient Operation Range: –13 °F to +158 °F (-25 °C to +70 °C) at ≤ 2,000 m altitude without derating.

Material Compliance and Certifications

• Certifications: Certified to UL 489, CSA C22.2 No.5, and IEC 60947-2 standards.
• Environmental credentials: Green Premium product designation, compliant with EU RoHS, REACH, PVC-free, and mercury-free.
• Insulation voltage rating (Ui): 750 V per IEC 60947-2.

Where It Works Best

• This breaker is an excellent choice for commercial buildings, industrial plants, manufacturing lines, data centers, or any installation where heavy current loads and high fault-interrupting capability are required. It fits new installations or retrofits of existing systems, especially where space is constrained but upgrade capability is needed. Suppose you’re distributing power to critical loads such as motors, HVAC units, large lighting banks, or upstream feeders and need an 800 A, 600 V solution with modern trip unit functionality. In that case, the MJL36800 is engineered for just that.