Square D | QBA221501 | Circuit Breaker | 150A | 2-Pole | 240V

Meet the Square D QBA221501 Circuit Breaker — a purpose-built, direct-replacement device for 150A, 2-pole, 240V circuits in Square D panels. Designed for maintenance, retrofit, and replacement work, this breaker delivers a reliable path to restoring protection without a full panel overhaul.

With the part number QBA221501 as your best compatibility reference, this breaker drops into the same footprint and wiring terminals as your existing unit, making upgrades quick and straightforward. Always confirm fit and ratings against your panel catalog before ordering to ensure a seamless swap.

Key specifications

• Amperage: 150A
• Poles: 2-Pole
• Voltage: 240V

Why this matters

• Targeted protection for high-demand circuits: 150A capacity safeguards wiring and connected equipment from overloads on 240V systems.
• Two legs, one safe disconnect: The 2-pole design ensures both hot legs trip together, enhancing safety on 240V installations.
• Efficient retrofit: Built for the Square D QBA family, offering a straightforward swap that minimizes downtime and panel rework.
• Clear compatibility reference: Rely on the QBA221501 part number to verify compatibility across compatible Square D panels and load centers.

Ideal use cases

• Replacing a failed or aging 150A, 240V breaker in existing Square D panels
• Retrofits where a 150A, 2-pole protection is needed for new equipment or added load
• Maintenance projects that require preserving the original protection scheme and panel architecture

Installation and safety tips

Power down the panel and follow local electrical codes during installation. Verify panel compatibility using the QBA221501 reference, as different Square D panels may use different breaker families. If uncertainty arises, consult the panel documentation or a qualified electrician to ensure a proper, safe fit.