Square D MO4 - 15A, 4-Pole, Circuit Breaker

The Square D MO4 15A four-pole circuit breaker is built for demanding electrical environments where safety, reliability, and precise protection matter. This unit delivers dependable overcurrent protection for panelboards, switchboards, and control panels, making it a trusted choice for industrial, commercial, and OEM applications.

• Four-pole protection for comprehensive safety—The four-pole configuration ensures all conductors in multi-wire or three-phase circuits can be disconnected simultaneously, reducing fault risk and simplifying maintenance in motor control centers.
• Optimized 15-amp rating—Calibrated to protect common control, sensing, and small-motor loads while minimizing nuisance trips in busy electrical environments.
• Versatile deployment—Engineered for integration into panelboards, switchboards, and control panels across industrial facilities and equipment OEMs, where space and reliability are critical.
• Solid Square D lineage—Backed by decades of field-tested performance, designed to meet strict safety and reliability standards for critical distribution panels.

Why this MO4 matters in your system

In distributed electrical setups, dependable overcurrent protection is non-negotiable. The MO4 15A guards feeders and motor circuits against short circuits and overloads, helping minimize downtime and protect costly equipment. Its four-pole design is particularly valuable in multi-wire and 3-phase applications where complete conductor isolation improves safety during faults and service work.

Ideal use cases

Use in new installations or replacements within:

• Panelboards and switchboards for commercial or light-industrial gear
• Motor control centers needing reliable protection for three-phase motors and associated control circuits
• OEM equipment where a compact, four-pole breaker aligns with your electrical architecture

Specifications at a glance

Current rating: 15 A
Poles: 4-Pole
Breaker type: Circuit Breaker