Square D MJ-5286 - 249VAC, Circuit Breaker

Engineered for reliability in demanding electrical systems, the Square D MJ-5286 - 249VAC, Circuit Breaker delivers precise overcurrent protection exactly where you need it. This breaker is designed to guard panelboards, switchboards, control panels, and OEM equipment, helping keep critical facilities running smoothly.

Why the MJ-5286 stands out

With a 249VAC voltage rating, this breaker is purpose-built for standard distribution and motor control environments. Its robust construction supports safe operation in industrial and commercial settings, pairing a dependable trip mechanism with durable components that isolate faults quickly to protect downstream equipment and minimize downtime.

Key applications

• Industrial distribution panels where reliable protection is essential for uptime
• Motor control centers requiring swift, dependable overcurrent interruption
• Control panels in commercial facilities that demand consistent protection and safe operation
• OEM equipment assemblies needing a proven, compatible protection component

What this means for your operation

Choosing the Square D MJ-5286 translates to fewer unexpected outages, longer equipment life, and a safer electrical landscape. It integrates seamlessly into existing 249VAC systems, delivering steady performance in daily operations, maintenance cycles, and retrofit projects.

Ideal for professionals

Facilities engineers, electrical contractors, and OEM integrators who design, install, or service distribution networks and motor control systems will appreciate the reliability and compatibility of this breaker in 249VAC environments.

Installation and maintenance tips

• Verify that your system voltage aligns with the 249VAC rating before installation
• Install in compatible Square D enclosures within panelboards, switchboards, or control panels
• Incorporate into preventive maintenance checks to confirm proper seating and operation