Siemens QJ2B200 200A 2-Pole 240 V Circuit Breaker Potential Transformer

Siemens QJ2B200 200A 2-Pole 240 V Circuit Breaker — Part Number QJ2B200 — delivers reliable overcurrent protection for demanding electrical systems. Built for Siemens panels and the broader QJ-series ecosystem, this 2-pole unit disconnects both hot lines at 240 V to protect wiring, motors, and sensitive downstream equipment.

Key Specifications

• Part Number: QJ2B200
• Current rating: 200 A
• Poles: 2
• Voltage rating: 240 V
• Type: Circuit Breaker (2-Pole)
• Compatibility: Siemens QJ-series panels and equipment

Why this Siemens Breaker Stands Out

When protection matters, the QJ2B200 delivers a precise, reliable response to overcurrent events within two hot legs of a 240 V circuit. Its 2-pole design ensures simultaneous disconnection of both conductors, enhancing personal safety and preventing potential backfeed scenarios. Designed for seamless integration with Siemens’ QJ family, it simplifies upgrades and replacements in existing systems, reducing downtime and field troubleshooting.

Ideal Use Cases

• Main protection for 240 V distribution circuits in commercial or light industrial panels
• Feed protection for subpanels or critical loads connected to 240 V networks
• Motor and equipment circuits where switching both legs simultaneously is essential for safety
• Panel retrofits or new installations that rely on Siemens’ QJ-series protection strategy

Installation and Compatibility Tips

• Verify panel compatibility with QJ-series breakers and ensure the QJ2B200 is permitted in your specific enclosure.
• Follow the manufacturer’s installation instructions for mounting, clearance, and electrical connections to maintain optimal performance and safety.
• Use the appropriate torque and inspection practices recommended for Siemens protective devices to ensure secure terminations.
• Keep spare QJ2B200 on hand for rapid replacement in critical service environments to minimize downtime.

Engineered for dependable, squarely targeted protection, the Siemens QJ2B200 200A 2-Pole 240 V Circuit Breaker is a clear choice for professionals who demand precise fault interruption, straightforward integration, and long-term reliability in Siemens-powered electrical systems.