Square D QOB115 - 15 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

When you need reliable protection for a single branch circuit, the Square D QOB115 delivers precise, dependable performance in a compact, bolt-on package. This 15A, 120V, 1-pole molded case circuit breaker is designed for use in panelboards and load centers, making it an ideal choice for both new installations and panel upgrades in residential, commercial, and light industrial settings.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing movement that can affect electrical performance over time.
• Thermal-magnetic trip unit ensures stable, repeatable protection by responding promptly to overcurrent conditions and short circuits, helping protect wiring and connected equipment.
• 1-pole, 15A, 120V design is perfect for individual branch circuits such as lighting runs or receptacle circuits, delivering targeted protection where you need it most.
• OEM-compatible compatibility works with matching Square D load centers and panelboards, enabling straightforward replacements and consistent electrical characteristics across the system.
• Molded-case construction offers a durable, compact solution that fits neatly into standard electrical panels without unnecessary bulk.

Why this model stands out

The QOB115 is more than a breaker—it's a reliable gatekeeper for your electrical system. The bolt-on mounting reduces the chance of loose connections in environments with vibration or frequent panel servicing, while the thermal-magnetic trip unit provides a balanced response to both sustained overloads and sudden short circuits. This combination keeps circuits protected without nuisance trips, giving you peace of mind in installations where dependable protection matters most.

Ideal applications and use cases

• Residential subpanels and main panels needing a trustworthy 15A, 1-pole solution for lighting or receptacle circuits.
• Commercial spaces with small equipment loads that require precise overcurrent protection in standard panelboards.
• Low- to mid-range industrial installations where reliable, compact breakers are part of a larger electrical distribution strategy.
• Panel upgrades or replacements where compatibility with existing Square D OEM load centers is desired for seamless integration.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: QOB115
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 15A
• Voltage Rating: 120V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for installation and longevity

• Ensure the breaker is used in a compatible Square D OEM panelboard or load center to maintain consistent electrical characteristics and fit.
• Follow standard safety procedures when servicing panels: disconnect the main, verify absence of voltage, and use appropriate personal protective equipment.
• During replacement, secure the breaker firmly with the bolt-on mounting to maintain a solid electrical connection and reduce the risk of vibration-related issues.