Square D QOB315 - 15 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D QOB315, a 15A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built for durability and precise protection, it’s a trusted choice for residential, commercial, and light industrial applications.

Why the QOB315 stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, maintaining a reliable electrical path even in dynamic environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance, responding accurately to both overloads and short-circuit conditions across varying temperatures.
• OEM-compatible design ensures seamless compatibility with matching load centers and panelboards, simplifying replacement and expansion projects.
• Versatile for multiple sectors suitable for residential, commercial, and light industrial settings where robust protection and dependable operation matter.

Technical at a glance

• Manufacturer: Square D
• Part Number: QOB315
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 15A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases and installation scenarios

• Upgrading panels in existing homes where a solid 3-pole, 240V protection device is required without reconfiguring bus bars.
• Installing in commercial electrical rooms and light industrial panels where vibration resistance and reliable trip performance are critical.
• Stocking replacement breakers in panelboards that use bolt-on MCCB units, ensuring quick, compatible replacements with minimal downtime.

Choosing the Square D QOB315 means opting for a purpose-built solution that prioritizes secure mounting, precise protection, and compatibility with OEM equipment. Whether you’re facing routine maintenance, panel expansion, or new construction, this 3-pole bolt-on breaker delivers the reliability you need to keep circuits safe and systems running smoothly.