MH36400 - 400 Amp Circuit Breaker

MH36400 - 400 Amp Circuit Breaker

Meet your go-to solution for heavy-duty electrical protection: the MH36400 molded-case circuit breaker. Designed to deliver dependable performance in commercial or industrial systems, it safeguards your circuits from overloads, short circuits, and unexpected faults—so your operations stay safe and uninterrupted. With a 3-pole, 400A rating and a high interrupting capability, this breaker is built for serious applications.

Key Features & Benefits

• High fault-clearing power: With an interrupting rating of 25 kA at 600 VAC (and up to 65 kA at 480 VAC and 240 VAC), the MH36400 can handle severe fault currents with confidence.
• Precise electronic protection: The integrated ET 1.0 trip unit delivers accurate time-current characteristics, helping prevent nuisance trips while maintaining safety.
• Manual override option: A push-to-trip button lets you manually test or trip the unit for maintenance or verification without depending solely on automatic triggers.
• Simple busbar interface: This model uses a unit-mount busbar connection for easier installation and better compatibility in distribution setups.
• 80% continuous loading: Rated for continuous operation at 80% of its 400A capacity, which gives designers flexibility in load planning.

Technical Specifications

• Rated Current: 400 A
• Poles: 3
• Voltage Rating: 600 VAC
• Interrupting Capacity:
  • 25 kA @ 600 VAC
  • 65 kA @ 480 VAC & 240 VAC
• Trip Unit Type: Electronic (ET 1.0)
• Mounting: Unit-mount, busbar type
• Dimensions (H × W × D): 12.86 in × 8.27 in × 8.05 in
• Net Weight: ≈ 29 lbs (13.2 kg)
• Continuous Rating: 80% of nominal current

Material Compliance & Certifications

• This circuit breaker complies with a full suite of international safety and performance standards, including UL, CSA, NOM, and IEC 60947-2.
• It’s CE-marked and rated IP40 for enclosure protection, making it suitable for installations within environments meeting pollution degree 3 (per IEC 60947-1).

Where It Works Best

• The MH36400 is ideal in commercial and industrial electrical distribution systems—especially where high fault currents are possible. Use it as a feeder breaker, in main distribution panels, or as part of critical power circuits.
• Because it meets isolation requirements per IEC 60947-2, it’s a smart choice in power panels, switchgear, or control centers. Its compatibility with busbar mounting also makes retrofits or expansions easier.