Square D QOB315GFI - 15 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOB315GFI is a dependable 15A, 240V, 3-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and loadcenters with unwavering reliability. Built for residential, commercial, and light industrial environments, this device delivers precise, repeatable protection while standing up to vibration and demanding duty cycles.

• Secure bolt-on mounting: A rigid connection to the bus minimizes movement and enhances reliability in vibration-prone installations, reducing the risk of loose connections over time.
• Thermal-magnetic trip unit: Combines precise thermal overcurrent protection with fast magnetic short-circuit protection for stable, predictable trip performance.
• OEM-compatible design: Specifically engineered to be compatible with matching OEM loadcenter and panelboard systems, ensuring straightforward integration and consistent protection across the panel.
• Versatile, three-phase protection: 3-pole configuration at 240V suits 3-phase panelboards and equipment feeders, making it ideal for commercial and light-industrial applications.

Why choose the Square D QOB315GFI for your panel?

The QOB315GFI isn’t just a breaker—it’s a protected pathway for your electrical system. Its bolt-on mounting provides a robust, vibration-resistant connection that holds up under real-world conditions, such as equipment loads, HVAC systems, and lighting circuits. The thermal-magnetic trip unit delivers dependable protection against nuisance trips while quickly clearing shorts, helping to minimize downtime and protect valuable downstream devices.

Key technical snapshot:

• Manufacturer: Square D
• Part number: QOB315GFI
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 15 A
• Voltage rating: 240 V
• Poles: 3
• Mounting style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters

Ideal use cases and practical considerations

Use the Square D QOB315GFI when you need reliable protection for 3-phase feeders or equipment in commercial settings, light industrial environments, or multi‑unit residential installations. It’s an excellent choice for:

• Upgrading aging panels where secure, vibration-resistant connections are critical
• Protecting motors, compressors, and other three-phase equipment in small-to-mid size facilities
• Replacing failed breakers in OEM-compatible loadcenters and panelboards without compatibility concerns
• New installations requiring a compact, bolt-on molded case solution with predictable trip characteristics

With its combination of secure mounting, precise protection, and OEM compatibility, the QOB315GFI offers a clear path to safer electrical systems and smoother maintenance cycles. If you’re sourcing a trusted, 3-pole 240V bolt-on breaker that aligns with Square D panel ecosystems and delivers repeatable protection, this device from AmpState is engineered to perform when it matters most.