Square D QOB2100 - 100 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D QOB2100—a dependable 100 A, 240 V, 2-pole bolt-on molded case circuit breaker designed to protect your electrical system where it matters most. Built to endure the demands of modern panelboards and load centers, this unit delivers steadfast branch circuit overcurrent and short-circuit protection with precise, repeatable performance.

Why the Square D QOB2100 stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, reducing movement and ensuring consistent electrical contact over time.
• Thermal-magnetic trip unit delivers stable, repeatable protection for both overloads and short circuits, helping minimize nuisance trips while safeguarding connected equipment.
• OEM compatibility is engineered to pair seamlessly with matching Square D load centers and panelboards, simplifying replacement and upgrades without compromising performance.
• Versatile application suited for residential, commercial, and light industrial environments, offering reliable protection across a range of panel configurations.

Product at a glance

• Manufacturer: Square D
• Part Number: QOB2100
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Voltage Rating: 240 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

Whether you’re upgrading an aging panel, designing a new installation, or expanding a commercial load center, the QOB2100 provides the protection you rely on. Ideal for circuits where secure mounting and robust protection are essential—think service entrances in homes, lighting and receptacle branches in small offices, or feeder circuits in light industrial spaces.

What problems it solves

• Prevents damage from overloaded circuits and arc-fault events by promptly interrupting fault currents.
• Eliminates loose connections and vibration-related wear through a sturdy bolt-on mount, promoting long-term reliability.
• Streamlines replacement and compatibility with OEM panelboards, reducing installation headaches and downtime.

Installation and compatibility tips

Plan installations around compatible Square D panelboards and load centers to ensure optimal fit and protection. The bolt-on design is straightforward for technicians familiar with molded case breakers, offering a secure, professional-grade connection that stands up to vibration and routine operation in mixed-use environments.

With the Square D QOB2100, you get a reliable, purpose-built solution for protecting branch circuits in a variety of settings. Its combination of secure mounting, precise thermal-magnetic protection, and OEM compatibility makes it a practical choice for ensuring electrical safety and system resilience.