Siemens | QJ23B150A02 | Circuit Breaker | 150A | 3-Pole | 240V | Bolt-On

Meet the Siemens QJ23B150A02 circuit breaker — a dependable, three-pole, 150-amp protection device designed for 240-volt systems. With a bolt-on mounting design, this breaker delivers solid, secure installation and durable performance in demanding electrical environments, making it a smart choice for maintenance, retrofit, and replacement projects.

Key specifications at a glance:

• Amperage: 150 A
• Poles: 3-Pole
• Voltage: 240 V
• Mounting: Bolt-On
• Part Number: QJ23B150A02
• Series: Siemens QJ bolt-on circuit breaker family

This breaker is ideal for a range of applications that require robust overcurrent protection and reliable performance. Use it in industrial panels, commercial electrical rooms, and retrofit projects where a 3-pole, 150A breaker is needed to safeguard feeders, motors, and critical distribution circuits. The bolt-on design not only speeds up field installation but also enhances mounting stability in environments with vibration or frequent access.

Why choose the QJ23B150A02 for your upgrade or replacement needs?

• Precise protection: Thermal-magnetic trip technology delivers fast, predictable response to overloads and short circuits, helping minimize equipment damage and downtime.
• Fast, secure installation: Bolt-On mounting simplifies installation and provides a rigid connection that remains reliable under heavy use.
• Durable, industrial-ready build: Designed to withstand the rigors of busy electrical rooms, with materials and construction built for longevity.
• Clear compatibility reference: The part number QJ23B150A02 is the most reliable reference when matching this breaker to Siemens panels that accept QJ bolt-on devices.

Practical tips for a smooth install: verify that your panel accepts bolt-on QJ devices, confirm the exact ratings align with downstream coordination, and review the panel labeling to ensure proper fit. If you’re replacing an older unit, ensure the trip curve aligns with the original to maintain protective coordination across the circuit. Always disconnect power and follow safety protocols during replacement.

In summary, the Siemens QJ23B150A02 is a purpose-built solution for durable, precise, and efficient overcurrent protection in 240V, 3-pole systems. It’s an excellent choice for professionals handling maintenance, retrofit, or replacement projects where exact specs and reliable performance matter.