Siemens QJ23B150 150A 3P 240V Circuit Breaker, Bolt-On | AmpState

Engineered for dependable circuit protection in commercial and industrial electrical systems, the Siemens QJ23B150 is a 3-pole, 150A, 240V bolt-on circuit breaker designed to safeguard panelboards, load centers, and distributed electrical equipment. Built to match the original QJ series fit, it ensures reliable replacement compatibility and alignment with the original BOM.

• Amperage: 150 A
• Poles: 3
• Voltage: 240 V
• Type: Bolt-On Circuit Breaker
• Part Number: QJ23B150
• Application: Panelboards, Load Centers, and Electrical Distribution

Why this Siemens breaker is a smart choice

Designed for everyday electrical protection, this bolt-on breaker delivers consistent, dependable performance in environments where reliability matters. The 3-pole configuration protects three live conductors simultaneously, making it suitable for three-phase systems and broader distribution networks. Its 150A rating provides substantial current handling for standard commercial and light-industrial loads, while the 240V specification matches common power distribution standards.

Ideal use cases

• Replacement projects where the original part number is QJ23B150 and BOM alignment is critical
• Stocking spares to minimize downtime during panel servicing or distribution upgrades
• Maintenance at facilities with Siemens panelboards, load centers, and electrical distributions
• New installations that require a secure, bolt-on protection device compatible with existing Siemens gear

Compatibility and installation insight

The QJ23B150 is purpose-built for Siemens panelboards and load centers that use the QJ-series bolt-on protection devices. A bolt-on design provides solid, mechanically secure mounting in compatible enclosures, contributing to stable operation under normal electrical faults. When matching parts, consider the original part number (QJ23B150) to ensure a seamless fit within an established BOM and distribution scheme.

Support from AmpState

Available from AmpState, the Siemens QJ23B150 is backed by support to help you confirm fit and compatibility. Need help matching a part number or confirming compatibility? Message us and we’ll help you verify the fit for your panel or distribution setup.