Siemens QJ23B150H - 150 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens QJ23B150H is a robust 150A, 240V, 3-pole bolt-on molded case circuit breaker engineered to protect your electrical system with precision. Designed for dependable branch circuit overcurrent and short-circuit protection, it fits seamlessly into panelboards and loadcenters, delivering reliable performance when it matters most.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical contact even in environments with movement or equipment vibration.
• Thermal-magnetic trip unit combines a thermal element for overload protection with a magnetic element for rapid short-circuit response, delivering stable, repeatable protection characteristics across varying loads.
• OEM-compatible design is engineered to work with matching Siemens OEM loadcenters and panelboards, reducing installation fuss and ensuring a reliable fit and predictable performance.
• Versatile application suitable for residential, commercial, and light industrial installations, from busier service panels to equipment rooms requiring dependable protection for three-phase circuits.
• Durable molded case construction built to endure daily operation and provide long-term protection for your electrical infrastructure.

Key specifications

• Manufacturer: Siemens
• Part number: QJ23B150H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150 A
• Voltage rating: 240 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and whom it’s for

• Upgrading or replacing a failing 3-pole protection device in Siemens panelboards or loadcenters, ensuring seamless compatibility and reliable protection.
• Protecting three-phase distribution feeders in light commercial spaces, warehouses, or small industrial rooms where stable trip performance matters.
• Installing as main or feeder protection in residential or commercial electrical panels that require a 150A rating and solid, bolt-on mounting.

Practical tips for installation and care

• Verify that the panelboard or loadcenter is designed for a 3-pole, 150A bolt-on breaker to ensure proper fit and electrical performance.
• Follow standard electrical safety practices: power down the equipment, confirm de-energization, and consult the panel’s documentation for torque recommendations on bolt-on connections.
• Use the thermal-magnetic protection characteristics to coordinate with upstream protective devices and downstream feeders for predictable protection curves.
• Store and handle the breaker carefully to avoid damage to the molded case or bus connections, preserving performance over the breaker’s service life.

With the Siemens QJ23B150H, you’re choosing a time-tested solution that blends precise protection with straightforward replaceability. It’s a thoughtful choice for any project requiring reliable 150A, 240V, 3-pole protection in a bolt-on format—delivered with the durability and compatibility you expect from Siemens.