Siemens QR2N12 250A 240 V Circuit Breaker

Protect high-demand 240 V circuits with precision using the Siemens QR2N12 250A 240 V Circuit Breaker. Engineered for reliability in commercial and light-industrial panels, this QR2N12 device delivers robust protection for large feeders and critical equipment, helping prevent damage from overloads and fault events.

Key specifications

• Current rating: 250 A
• Voltage rating: 240 V
• Part number: QR2N12
• Series: Siemens QR-type circuit breaker

What makes the QR2N12 unique

• Direct compatibility with Siemens panels that accept QR-type breakers, enabling smooth installation and dependable performance within your existing electrical infrastructure.
• High-capacity protection for large feeders and substantial loads, making it well-suited for commercial electrical rooms, industrial equipment, and powerful 240 V distributions.
• A purpose-built solution from Siemens’ QR family, designed to deliver consistent interruption of fault currents and clear, actionable protection for critical circuits.

Ideal use cases

• Feeder protection for large HVAC systems, motors, and cooling equipment on 240 V circuits.
• Protection for distribution panels and service enclosures in commercial facilities and light industrial settings.
• Backup and auxiliary circuits where reliable, high-current interrupt capability is essential.

Why you’ll value it in your system

The QR2N12 offers a targeted solution when your application demands substantial current protection at 240 V. By safeguarding conductors and downstream equipment from overloads, it helps reduce the risk of electrical faults, minimizes downtime, and supports safer, more maintainable power distribution. Its Siemens pedigree provides confidence in compatibility, availability of spare parts, and consistency with other QR-series components.

Tips for installation and compatibility

Verify that your panel accepts QR-type breakers and replace only with the same type and rating to maintain system integrity. Always follow appropriate safety procedures, disconnect power before servicing, and consult the panel’s documentation to ensure proper fitment and wiring practices for 250 A, 240 V applications.