Square D QOU390 - 90A, Circuit Breaker

Meet the Square D QOU390 90A Circuit Breaker—a purpose-built protective device designed to shield electrical systems from overloads and faults. With a 90-amp rating, this breaker provides decisive interruption when protection is needed, helping to maintain safe operation across your distribution network.

Key specifications at a glance

• Current rating: 90 A
• Breaker type: Circuit Breaker

Where it shines

Specifically suitable for panelboards, switchboards, control panels, and OEM equipment, the QOU390 delivers reliable overcurrent protection in environments where dependable performance matters most. It’s an ideal choice for industrial facilities, commercial installations, and OEM applications that require safe operation in distribution panels and motor control centers.

Why this matters

In demanding settings, protecting wiring and equipment from short circuits and overloads is critical to minimizing downtime and extending the life of motors and drives. The Square D QOU390 provides sturdy, straightforward protection that supports sustained, safe operation in your electrical infrastructure.

Practical use cases

• Industrial facilities with heavy motor loads needing robust 90A protection for feeders and branch circuits
• Commercial buildings requiring reliable protection within panelboards and switchboards
• OEM equipment enclosures where a dependable 90A circuit breaker is part of the control architecture

Making the right choice

Choose the Square D QOU390 when you need a proven 90A circuit breaker that aligns with your distribution strategy and OEM configurations. Its clear protection profile supports safety, reliability, and straightforward maintenance in both new installations and retrofits.