Square D MHL36350 - 350 A, 3-Pole Circuit Breaker | AmpState

Square D MHL36350 is a 350A, 3-pole molded case circuit breaker engineered to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Designed for demanding environments, it provides the robustness you need for residential, commercial, and light industrial applications.

• Compact molded case design helps maximize panel space and simplifies bus bar arrangement, making installations neater and easier to service.
• Thermal-magnetic trip unit combines overload protection (thermal) with instantaneous short-circuit protection (magnetic) for stable, repeatable performance across temperature variations and load conditions.
• 3-pole configuration supports balanced three-phase systems, ideal for larger feeders and motor-driven loads.
• OEM-compatible integration is designed to work with matching Square D loadcenters and panelboards, ensuring proper fit, electrical coordination, and straightforward maintenance.
• High-current capability with a 350A rating makes it well-suited for main feeders and substantial branch circuits in a range of facilities.

Technical snapshot

• Manufacturer: Square D
• Part Number: MHL36350
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 350A
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Who benefits from this breaker

• Facility owners upgrading panelboards or loadcenters that require robust protection for high-current circuits
• Electrical contractors installing or refurbishing commercial spaces, light industrial facilities, or multi-residential buildings
• Systems that run three-phase equipment or large motor loads where reliable instantaneous trip is crucial

Practical usage and setup tips

• Verify that your panelboard or loadcenter is designed to accept a 350A, 3-pole molded case breaker of the MHL family to ensure proper fit and electrical coordination.
• Plan for space efficiency: the compact molded case design helps you optimize bus layouts and maintain clear labeling for easier service later on.
• Consider ambient conditions and wiring requirements typical for residential, commercial, or light industrial environments to maintain consistent protector performance.
• Replace like-for-like: when upgrading or replacing an existing MHL36350, maintain the exact part number to preserve compatibility with OEM enclosures and upstream protective devices.

Built to deliver dependable, coordinated protection in Square D systems, the Square D MHL36350 – 350A, 3-Pole Molded Case Circuit Breaker is a focused solution for serious electrical protection where space efficiency, precise trip performance, and seamless panel integration matter most. If you’re equipping panelboards or loadcenters for substantial branch circuits or high-current feeders, this breaker provides clear, practical advantages you’ll notice in installation ease and long-term reliability.