Square D QOB350EPD Circuit Breaker, 50A, 3-Pole, 240V

Square D QOB350EPD is built for demanding industrial electrical service, maintenance, and replacement projects where dependable three‑phase protection matters most. Designed to match the On Circuit Breaker Rating QOB family, this 50 A, 3‑pole, 240 V breaker delivers precise protection for your three‑phase systems while fitting seamlessly into compatible Square D panels.

• Exact fit for QOB series—part of the Square D QOB On Circuit Breaker lineup. Verify compatibility by part number to ensure reliable performance in your application.
• Powerful 50 A, 3‑pole design—protects three‑phase feeders and motors, helping prevent electrical faults from escalating into costly downtime.
• 240 V operation—suitable for standard three‑phase electrical distributions in industrial environments, from manufacturing lines to large equipment banks.
• Ideal for replacements and upgrades—a practical choice when refurbishing older panels or expanding capacity in an existing installation.
• Durable, field‑tested reliability—engineered to withstand the rigors of industrial use and provide consistent tripping performance when faults occur.
• Support when you need it—need help matching a part number or confirming compatibility? Message us and we’ll assist you to ensure the right fit for your application.

What this means for you

Whether you’re stocking a maintenance kit, upgrading a panel, or replacing a worn breaker, the QOB350EPD offers a trusted solution that aligns with Square D’s engineering standards. Its 3‑pole, 240 V configuration is ideal for protecting three‑phase circuits, including motor loads, feeders, and other critical systems in industrial settings. By sticking with the QOB series you gain consistent performance characteristics, simplifying future maintenance and part sourcing.

Usage scenarios and practical considerations

Use this breaker when you need reliable protection for a 3‑phase circuit operating at 240 V with a 50 A maximum load. It’s well-suited for:

• Industrial motor feeders and drive circuits
• Three‑phase distribution panels in manufacturing and processing facilities
• Replacement of aging or failed breakers in QOB‑compatible panels
• Maintenance outages where precise, predictable tripping behavior matters

Remember to confirm fit by part number (QOB350EPD) and assess your application requirements, including panel compatibility and fault‑current characteristics. If you’re unsure, reach out for guidance—accurate part matching saves time, reduces risk, and keeps your equipment protected.