Square D MJA36350 - 350 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D MJA36350 from AmpState — a heavy-hitting 350 A, 600 V, 3-Pole Plug-In Molded Case Circuit Breaker designed to safeguard panelboards and loadcenters with dependable, repeatable protection. Built for fast, field-friendly installation and easy maintenance, this device keeps your electrical systems running smoothly in demanding environments.

Why this breaker stands out

• Fast plug-in connection for quick installation and painless replacement, minimizing downtime during upgrades or service work.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining precise overload sensing with rapid magnetic tripping for short circuits, even as ambient conditions shift.
• OEM-compatible design is engineered to fit seamlessly with matching Square D load centers and panelboards, ensuring secure mounting and predictable electrical performance.
• High-capacity protection rated at 350 A and 600 V, making it suitable for heavy-duty branch circuits in residential-adjacent settings, commercial spaces, and light industrial applications.

Key applications and use cases

• Protection of large-diameter branch circuits in commercial offices, retail environments, and light industrial facilities.
• Upgrading or retrofitting panelboards where a robust, plug-in solution reduces installation time and disruption.
• Panelboard and loadcenter protection where consistent trip performance across temperature ranges is essential.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: MJA36350
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 350 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Designed for reliability in panelboards and loadcenters, the MJA36350 helps you maintain continuous service with precise protection against overloads and short circuits. Its plug-in form factor simplifies replacements and minimizes wiring complexity, while the thermal-magnetic trip mechanism provides predictable performance across a range of operating conditions. If you’re outfitting commercial, light industrial, or mixed-use spaces with high-current needs, this breaker offers a durable, industry-standard solution that aligns with Square D’s trusted protection philosophy.