Siemens | QJ3B150 | Circuit Breaker | 150A | 3-Pole | 240V | Bolt-On

Meet the Siemens QJ3B150—a bolt-on circuit breaker engineered for dependable protection in 240V, three‑phase systems. With a 150A rating and a 3‑pole configuration, this unit is built to guard your distribution feeders while delivering straightforward maintenance, retrofit, and replacement capabilities in compatible Siemens panels.

Key specifications

• Amperage: 150A
• Poles: 3-Pole
• Voltage: 240V
• Mounting: Bolt-On
• Best reference for compatibility: QJ3B150

Why this Siemens QJ3B150 stands out

• Bolt‑on mounting provides a secure, reliable connection that simplifies installation and reduces panel alteration during retrofit or maintenance.
• 3‑pole design protects all three phases in 240V three‑phase circuits, delivering balanced protection across the system.
• Manufactured by Siemens, offering OEM integrity and compatibility with panels designed to accept the QJ3B150 form factor.
• Specifically suited for replacement and retrofit projects where exact spec matching is critical to system safety and performance.

Ideal use cases

• Replacing a failed or aging 150A, 3‑pole breaker in commercial or light industrial 240V three‑phase panels.
• Retrofits and service upgrades where maintaining the exact Siemens form factor minimizes panel downtime.
• Spare parts planning for ongoing maintenance in facilities that rely on Siemens protection equipment.

Compatibility and ordering guidance

Before you order, confirm the fit and ratings for your specific panel. The part number is the most reliable reference for compatibility, so use QJ3B150 as the primary cross-check against your panel model and distribution setup. This ensures you get the exact breaker required for safe, compliant operation in your 240V, three‑phase system.