MHL36900 - 900 Amp Circuit Breaker

MHL36900 - 900 Amp Circuit Breaker

Protect your high-power systems with confidence using the Schneider Electric/Square D MHL36900 molded-case breaker. Designed for heavy industrial and commercial installations, this three-pole unit delivers dependable protection against overloads and short circuits, while fitting neatly into demanding panel layouts. Whether you’re retrofitting an existing setup or building from scratch, the MHL36900 gives you peace of mind that your electrical distribution remains safe and reliable under load.

Key Features and Benefits

• High capacity support: Rated for 900 A at 600 V AC, this breaker handles substantial current loads, making it ideal for demanding environments.
• Feed-through design: Terminals on both line and load sides allow easier downstream connections and system expansion.
• Thermal-magnetic protection: Integrates long-time and instantaneous trip functions to accurately respond to both prolonged overloads and sudden fault currents.
• High interrupting rating: Capable of interrupting fault currents up to 65 kA at 480 V AC (and 25 kA at 600 V), ensuring the breaker can safely clear significant faults.
• Space-efficient form: The molded case design keeps the footprint moderate (e.g. ~14 in × 9 in × 4.53 in) while still delivering full industrial performance.
• Easy maintenance & upgrades: Standard lug configurations simplify connection, and the feed-through layout supports flexible wiring changes over time.

Technical Specifications

• Voltage Rating: 600 V AC
• Current Rating: 900 A
• Poles: 3 (three-phase)
• Interrupting Capacity:
  • 65 kA @ 480 V AC
  • 25 kA @ 600 V
• Mounting Style: Fixed, feed-through capable
• Trip Unit Type: Thermal-magnetic, non-interchangeable
• Frequency: 50 / 60 Hz
• Operating Temperature Range: –20 °C to +70 °C
• Dimensions (approx.): 14.0 in × 9.0 in × 4.53 in

Material Compliance and Certifications

• Green Premium / Eco-friendly labeling: Part of Schneider’s low-impact product line, designed with sustainability among its priorities.
• UL & CSA certified: Meets UL 489 and CSA C22.2 No. 5 standards for molded case breakers, ensuring safe operation under North American regulatory regimes.
• RoHS compliance: Manufactured to reduce usage of hazardous substances, aligning with modern environmental regulations.
• Proposition 65 compliance: Disclosure for California’s chemical safety initiative is maintained.

Where It Works Best

• The MHL36900 is built to shine in high-demand environments:
• In commercial or industrial power distribution panels, acting as main or subfeed protection
• For large motors, heavy machinery, or process equipment requiring solid overcurrent protection
• In energy infrastructure, as a key protective device in plants, manufacturing floors, or data center feeders
• Wherever you need a durable, high-current breaker that balances performance and compactness
• This model is ideal when you need a dependable, high-capacity circuit breaker that will stand up to heavy use without compromising safety or flexibility.