The Square D MH36450 molded case circuit breaker is a high-performance thermal magnetic protection device designed for commercial and industrial power distribution systems. Built with the reliable I-Line frame style construction, this breaker delivers dependable overload and short-circuit protection for demanding electrical applications. Featuring a non-interchangeable trip unit and durable molded case housing, the MH36450 ensures long-term operational safety, efficient circuit interruption, and stable electrical performance. Its plug-in mounting configuration simplifies installation while maintaining secure connectivity within distribution panels and switchboards.

Product Specifications

• Brand: Square D
• Model: MH36450
• Frame Style: MH (I-Line)
• Product Type: Molded Case Circuit Breaker
• Breaker Type: Thermal Magnetic
• Trip Unit: Non-Interchangeable
• Amperage Rating: 450 Ampere
• Number of Poles: 3 Pole
• Mounting Type: Plug In
• Maximum Voltage Rating: 600V
• Standard Lug Type: Load End
• Operating Temperature Reference: 40°C
• Warranty: One Year

Technical Specifications

• Thermal magnetic trip mechanism for overload and short-circuit protection
• Non-interchangeable trip unit design for fixed protection settings
• Heavy-duty molded case construction for industrial applications
• Reliable high interrupting capacity performance
• Plug-in connection for simplified installation and maintenance
• Designed for I-Line distribution systems
• Suitable for commercial and industrial power distribution networks
• Durable internal components engineered for extended service life

Voltage and Ratings

• Rated Current: 450A
• Rated Maximum Voltage: 600V
• Interrupting Capacity: 65kA @ 240 VAC
• Interrupting Capacity: 65kA @ 480 VAC
• Interrupting Capacity: 25kA @ 600 VAC
• Interrupting Capacity: 14kA @ 250 VDC
• Trip Setting Range: 2250–4500
• Frequency Rating: 50/60Hz

Product Data

• Manufacturer: Square D
• Product Category: Molded Case Circuit Breaker
• Series: I-Line / M Frame
• Connection Type: Plug In
• Frame Type: M
• Pole Configuration: 3 Pole
• Lug Configuration: Load End Terminals Standard
• Condition Support: Certified Reconditioned and New Surplus
• Included Warranty Coverage: Shipping, repairs, parts, and labor for recertification
• Application: Commercial and Industrial Electrical Distribution Systems

Important Note

The product image shown represents a base model and is intended for identification purposes only. Accessories ordered together with the breaker can be professionally installed according to the required configuration at no additional cost when installation details are provided during checkout. Installation and servicing should only be performed by qualified electrical personnel following applicable electrical codes and manufacturer recommendations. Warranty coverage excludes damage caused by misuse, improper installation, or normal wear and tear.

Returns are easy

You may return items within 30 days of delivery for a refund.

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My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.