Square D QOB2501021 - 50 A, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D QOB2501021, a 50A, 2-pole bolt-on molded case circuit breaker designed for dependable branch circuit protection in panelboards and load centers. Engineered to perform across residential, commercial, and light industrial applications, this breaker combines robust construction with precise protection, making it a reliable choice for your electrical infrastructure.

• Secure bolt-on mounting delivers a rigid, vibration-resistant bus connection for long-lasting electrical integrity.
• Thermal-magnetic trip unit provides stable, repeatable protection by addressing both overload conditions and short-circuit events, reducing nuisance trips and keeping circuits safer.
• OEM-compatible design ensures seamless compatibility with matching Square D OEM load centers and panelboards, simplifying replacement and upgrades.
• 50A, 2-pole configuration suits typical 240V branch circuits, ideal for mid-to-large loads in various settings.
• Molded case construction combines durability with predictable trip characteristics, supporting reliable performance over time.

Why this breaker is a smart choice

The QOB2501021 is purpose-built for everyday protection where reliability matters. Its bolt-on mounting minimizes movement and wear in vibration-prone environments, while the thermal-magnetic trip unit delivers fast, consistent responses to overloads and faults. By pairing with matching OEM equipment, it helps maintain electrical system coordination and protection curves that technicians rely on for safe operation and easier maintenance.

Ideal use cases

• Residential service panels upgrading or expanding 240V branch circuits (e.g., dedicated HVAC feeders, electric water heaters, large outlets).
• Commercial panelboards supporting equipment like rooftop units, cooling systems, or high-draw industrial lighting circuits.
• Light industrial installations that require dependable overcurrent and short-circuit protection with a robust bolt-on mount.

Technical details at a glance

• Manufacturer: Square D
• Part Number: QOB2501021
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50A
• Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Protect your panelboard and load center with a trusted Square D solution that delivers durable construction, precise protection, and straightforward integration. Add the QOB2501021 to your cart to ensure steady, reliable performance across the circuits that power your home or business.