Square D | QOB2901021 | Circuit Breaker | 90A | 2-Pole | 240V

Meet the Square D QOB2901021 circuit breaker—the OEM-grade solution designed to deliver dependable overcurrent protection in 240V panels. This 90A, 2-pole unit provides robust, coordinated protection for both hot legs, helping keep your electrical system safe and compliant during demanding operations or upgrades.

• Amperage: 90A
• Poles: 2-Pole
• Voltage: 240V
• Part number: QOB2901021 (best reference for compatibility)

Why this breaker stands out

Choosing an OEM Square D breaker like the QOB2901021 ensures precise fit, correct trip characteristics, and reliable electrical coordination with your existing panel. Designed for both maintenance and retrofit projects, this unit helps you maintain proper protection without compromising panel integrity or safety margins.

What problems it solves

When panels are aging or load requirements shift, simply swapping in a compatible 90A 2-pole 240V breaker minimizes downtime and maintains critical circuit protection. The QOB2901021 is ideal for replacing worn or tripped breakers in systems that require a precise 90-amp, two-pole solution, ensuring consistent performance across both conductors and preserving proper disconnection in fault conditions.

Ideal use scenarios

• Maintenance and retrofit projects where exact specifications are required
• Replacement in Square D panels that accommodate the QOB series
• Upgrading or restoring 240V circuits that demand 90A protection with two poles

Important compatibility notes

Before ordering, confirm the fit and ratings for your panel. The part number QOB2901021 is the most reliable reference to ensure compatibility with your Square D electrical system and to maintain proper electrical protection

Practical tips for installation and use

Handle with the power off and follow standard safety protocols. When replacing a breaker, verify that the new unit interrupts at the same or higher current level as the original, and ensure the panel labeling reflects the updated rating. If you’re unsure about panel compatibility, rely on the part number QOB2901021 as your guiding reference to match the correct bus design and mounting style.