MH36300 - 300 Amp Circuit Breaker

MH36300 - 300 Amp Circuit Breaker

Ensure your installation is protected with the MH36300 circuit breaker, part of Schneider Electric’s PowerPacT M lineup. This three-pole, 300 A breaker is built for demanding electrical environments, offering dependable overload and short-circuit protection. Its electronic trip design delivers accuracy and peace of mind, while the built-in push-to-trip control gives you manual override when needed. Whether you’re upgrading a panel or designing a new distribution system, the MH36300 gives you performance and reliability without complexity.

Key Features and Benefits

• High fault clearing ability: Rated for 25 kA at 600 VAC (and up to 65 kA at 480 VAC and 240 VAC), this breaker is capable of handling large fault currents safely.
• Advanced electronic trip unit (ET 1.0): Offers more precise protection than conventional thermal-magnetic designs, helping to avoid nuisance trips and equipment damage.
• Manual intervention option: The integrated push-to-trip button enables manual tripping for testing or maintenance without pulling the handle.
• Simple busbar connection: Designed for easy integration into systems via unit mount busbar termination, reducing installation time.
• Compact footprint, consistent form factor: Maintains uniform size, handle location, and mounting as other PowerPacT M and P units, making replacements or upgrades easier.
  

Technical Specifications

• Rated Current: 300 A
  
• Poles: 3
  
• Voltage Rating: 600 VAC
  
• Interrupting / Breaking Capacity:
  • 25 kA @ 600 VAC
  • 65 kA @ 480 VAC
  • 65 kA @ 240 VAC
• Trip Unit Type: Electronic, ET 1.0
  
• Continuous Rating: 80 %
  
• Mounting Mode: Unit mount / busbar
  
• Dimensions:
  • Height: 12.86 in
  • Width: 8.27 in
  • Depth: 8.05 in
• Net Weight: 29 lb (≈ 13.15 kg)
  

Material Compliance and Certifications

• Industry Standards: The MH36300 meets rigorous global safety and environmental standards. It is UL, CSA, NOM, and IEC 60947-2 certified, and carries the CE mark.
• Protection and Insulation: It meets insulation and protection requirements with an IP40 rating and is suitable for environments classified as pollution degree 3 under IEC 60947-1.
  

Where It Works Best

• This breaker is ideal for industrial and commercial power distribution systems where consistent, accurate protection is essential. Use it in main or sub-distribution panels, motor control centers, or in systems that require selective coordination and high fault capacity. Because its dimensions and mounting match other PowerPacT lines, it’s also a good choice for upgrading older systems with minimal mechanical changes.