Square D MAR36800 800A 600 V Circuit Breaker

Meet the Square D MAR36800 800A 600V Circuit Breaker — a purpose-built protection device designed to keep large electrical systems safe, reliable, and running smoothly. This molded case circuit breaker (MCCB) is built for demanding industrial environments, delivering secure interruption and clear protection for high-current feeders.

With an 800-amp current rating and a 600-volt maximum rating, the MAR36800 is engineered for main service disconnects and heavy-duty distribution panels where reliable fault protection matters most. As part of Square D's trusted protection lineup, it integrates seamlessly with other Square D components to ensure consistent trip characteristics and straightforward maintenance across your facility.

Key specifications

• Part Number: MAR36800
• Current rating: 800 A
• Voltage rating: 600 V
• Type: Molded Case Circuit Breaker (MCCB) from Square D
• Application: protection for large feeders and main service disconnects in industrial panels

Why this MAR36800 matters

• High-current protection in a compact MCCB form factor, reducing panel footprint while maintaining robust safety margins.
• Rugged construction and reliable thermal-magnetic trip mechanism designed to handle repeated fault events without nuisance tripping.
• Consistent performance within Square D distribution ecosystems, making replacement and upgrades predictable and straightforward.
• Clear labeling and standard, service-friendly terminals to simplify installation, inspection, and maintenance tasks.

Ideal applications and use cases

• Main service protection in industrial facilities, warehouses, and manufacturing lines that require high-current disconnect capable of 800 A at 600 V.
• Feeder protection for large motors, pumps, or heavy machinery where dependable interruption is critical to prevent equipment damage and downtime.
• Retrofitting or expanding existing Square D panels that rely on compatible MAR-series MCCBs for consistent performance.

Practical guidance for selection and use

• Ensure compatibility with your Square D panel and mounting configuration to maximize protection reliability and ease of replacement.
• Pair with appropriate accessories and follow the manufacturer’s installation guidelines to maintain electrical safety and code compliance.
• Consider the expected fault current, distribution architecture, and maintenance plan to determine how the 800 A, 600 V MAR36800 fits into your protection scheme.

Choose the Square D MAR36800 800A 600V Circuit Breaker when you need durable, high-capacity protection that aligns with Square D’s proven reliability. It’s a strategic, long-term asset for safeguarding heavy electrical distributions and maintaining uptime across demanding environments.