Square D | MJA36350 | Circuit Breaker | 350A | 3-Pole | 600V | Bolt-On

The Square D MJA36350 Circuit Breaker delivers dependable, high‑current protection for demanding 3‑phase electrical systems. With a 350A rating, 3 poles, and a 600V capacity, this bolt‑on breaker is purpose‑built for maintenance, retrofit, and replacement projects where exact specifications matter.

Product highlights that matter in the field:

• 350 A rating provides robust protection for main feeders and heavy motor circuits.
• 3‑pole design safeguards three‑phase loads with balanced protection across all conductors.
• 600V electrical rating makes it suitable for many industrial distribution applications and motor systems.
• Bolt‑On mounting offers a secure, vibration‑resistant installation and simplifies field replacement in compatible enclosures.
• Exact compatibility reference is the part number MJA36350—verify fit and ratings against your panel before ordering to ensure a seamless swap.

Ideal use cases include upgrading service panels and motor control centers that require higher current protection, replacing aging breakers in Square D panels, or retrofitting existing setups to accommodate larger loads without changing the entire enclosure.

Why choose this breaker over alternatives? It’s built to integrate cleanly with Square D systems, delivering reliable trip performance and consistent contact quality across heavy-duty applications. The bolt‑on design minimizes installation complexity in retrofit projects, helping technicians complete service during scheduled downtime with fewer field complications.

Quick compatibility reminder: Confirm fit and ratings before ordering. The best reference for compatibility is the exact part number MJA36350, which ensures you’re selecting a breaker that aligns with your enclosure, bus arrangement, and electrical rating.

Technical at a glance

• Amperage: 350A
• Poles: 3‑Pole
• Voltage: 600V
• Mounting: Bolt‑On