The Square D MH36400 400A 3 Pole Thermal Magnetic MCCB – I-Line Plug In – 600V is a durable molded case circuit breaker designed for dependable circuit protection in industrial and commercial electrical distribution systems. Built with an MH (I-Line) frame style and thermal magnetic non-interchangeable trip unit, this breaker provides reliable overload and short-circuit protection for medium and high-capacity electrical loads. Its I-Line plug-in configuration allows fast installation and secure integration into switchboards and panelboards for long-term operational reliability.

Product Specifications

• Brand: Square D
• Model: MH36400
• Rated Current: 400 Ampere
• Number of Poles: 3 Pole
• Breaker Type: Thermal Magnetic Molded Case Circuit Breaker (MCCB)
• Mount Type: I-Line Plug In
• Frame Type: MH (I-Line) Frame
• Maximum Voltage: 600 VAC
• Trip Unit Type: Thermal Magnetic Non-Interchangeable
• Standard Lug Type: Load End
• Application: Industrial and Commercial Power Distribution

Technical Specifications

• Interrupting Capacity:
  • 65 kA @ 240 VAC
  • 65 kA @ 480 VAC
  • 25 kA @ 600 VAC
  • 14 kA @ 250 VDC
• Trip Setting Range: 2000 – 4000
• Operating Temperature Reference: 40°C
• Protection Type: Overload and Short Circuit Protection
• Connection Type: Plug In
• Terminal Configuration: Load End Terminals Standard
• Thermal Magnetic Protection Mechanism
• Heavy-Duty Industrial Construction

Voltage and Ratings

• Rated Operational Voltage: Up to 600 VAC
• DC Voltage Rating: 250 VDC
• Current Rating: 400A
• Pole Configuration: 3 Pole
• Interrupting Rating at 240 VAC: 65 kA
• Interrupting Rating at 480 VAC: 65 kA
• Interrupting Rating at 600 VAC: 25 kA
• Interrupting Rating at 250 VDC: 14 kA
• Frequency: 50/60 Hz
• Temperature Calibration: 40°C

Product Data

• Manufacturer: Square D
• Product Condition: New / Certified Reconditioned (Depending on Availability)
• Warranty: 1 Year In-House Warranty
• Connection Style: I-Line Plug In
• Frame Style: MH (I-Line) Frame
• Suitable For: Switchboards, Panelboards, and Industrial Distribution Systems
• Accessory Installation: Available at No Additional Cost with Breaker Purchase
• Packaging: Standard Industrial Packaging
• Country of Origin: USA

Important Note

Product images are provided for identification purposes only and may not represent the exact configured unit. Accessories purchased together with the breaker can be professionally installed according to your required configuration at no additional cost. Installation, operation, and maintenance should only be performed by qualified electrical professionals in accordance with applicable electrical codes and safety regulations. Warranty coverage includes repairs, replacement parts, labor, and standard shipping required for recertification, excluding damage caused by misuse, improper installation, or normal operational wear and tear.