Siemens | QJ3B22500S01 | Circuit Breaker | 225A | 3-Pole | 240V

Siemens QJ3B22500S01 Circuit Breaker delivers dependable overcurrent protection for 3‑phase electric systems operating at 240V. Built for maintenance, retrofit, and replacement projects, this 225A, 3‑pole unit is designed to drop into compatible Siemens panels with precision, helping you protect critical loads — from motors to conveyors — with confidence.

• Part number: QJ3B22500S01
• Amperage: 225 A
• Poles: 3‑Pole
• Voltage rating: 240 V

Why this breaker stands out — specifically engineered to align with Siemens’ QJ3B family, it offers a familiar form factor and mounting pattern that simplifies retrofits and replacements. Its 3‑pole design provides balanced protection across a 3‑phase circuit, helping to prevent under/over‑current conditions from impacting connected equipment and processes.

Ideal use cases

• Retrofit or replace worn breakers in commercial or industrial panels that require 225A, 3‑pole, 240V protection
• Maintenance outages where panel compatibility and rapid re‑commissioning are critical
• Protection for 3‑phase loads in manufacturing lines, HVAC systems, and large equipment rooms

Compatibility and practical notes — the part number is the most reliable reference for matching this unit to your setup. Before ordering, confirm fit and ratings on your panel label and ensure it aligns with the Siemens QJ3B series specifications to avoid compatibility issues.

If you’re upgrading an existing system or replacing a failing breaker, the Siemens QJ3B22500S01 provides clear, straightforward protection for 240V 3‑phase circuits. Consider this unit for installations where reliability, quick installation, and precise compatibility with Siemens panel configurations are paramount.

Pro tips for installers — shut down power to the panel, follow all safety procedures, and use proper torque on terminations. Keep a copy of the panel’s labeling and the project’s electrical drawings handy to verify the exact model compatibility during replacement or retrofitting work.