The Square D MJA36800 PowerPact molded case circuit breaker is a high-performance industrial protection device engineered for commercial and industrial electrical distribution systems. Designed with a PowerPact M frame style and I-Line configuration, this breaker features an advanced electronic trip unit that provides precise overload and short-circuit protection for high-capacity applications. Its rugged molded case construction, high interrupting ratings, and plug-in mounting design ensure dependable operation, secure installation, and long-term durability in demanding power distribution environments.

Product Specifications

• Brand: Square D
• Model: MJA36800
• Series: PowerPact M
• Product Type: Molded Case Circuit Breaker
• Breaker Type: Electronic
• Trip Unit: Electronic Trip Unit
• Frame Style: M Frame
• Mounting Type: Plug In / I-Line Frame
• Amperage Rating: 800 Ampere
• Number of Poles: 3 Pole
• Maximum Voltage Rating: 600V
• Standard Lug Type: Load End
• Operating Temperature Reference: 40°C
• Warranty: One Year

Technical Specifications

• Electronic trip unit for accurate overload and short-circuit protection
• Molded case construction designed for industrial-grade durability
• I-Line frame configuration for efficient installation and maintenance
• High interrupting capacity for enhanced electrical safety
• Plug-in mounting design for secure system integration
• Suitable for commercial and industrial distribution systems
• Reliable interruption performance under demanding load conditions
• Advanced trip settings for improved protection flexibility

Voltage and Ratings

• Rated Current: 800A
• Rated Maximum Voltage: 600V
• Interrupting Capacity: 100kA @ 240 VAC
• Interrupting Capacity: 65kA @ 480 VAC
• Interrupting Capacity: 25kA @ 600 VAC
• Trip Setting Range: 1600–8000
• Frequency Rating: 50/60Hz

Product Data

• Manufacturer: Square D
• Product Category: Molded Case Circuit Breaker
• Product Series: PowerPact M
• Connection Type: Plug In
• Frame Type: M
• Pole Configuration: 3 Pole
• Lug Configuration: Load End Terminals Standard
• Mounting Configuration: I-Line Frame
• Condition Support: Certified Reconditioned and New Surplus
• Included Warranty Coverage: Shipping, repairs, parts, and labor for recertification
• Application: Commercial and Industrial Electrical Distribution Systems

Important Note

The product image shown represents a base model and is intended for identification purposes only. Accessories purchased together with the breaker can be installed at no additional cost according to customer configuration requirements when installation instructions are provided during checkout. Installation, operation, and maintenance must be performed by qualified electrical personnel in accordance with applicable electrical standards and manufacturer guidelines. Warranty coverage excludes damage caused by misuse, improper installation, or normal wear and tear.

Returns are easy

You may return items within 30 days of delivery for a refund.

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My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.