Siemens | HQJ23B150HL | Circuit Breaker | 150A | 3-Pole | 240V | Bolt-On

Meet the Siemens HQJ23B150HL circuit breaker—an industrial-grade solution engineered for dependable overload protection in commercial and light industrial panels. With a 150A rating, 3-pole configuration, and 240V operation, it’s built to handle demanding electrical environments while keeping critical equipment safeguarded.

Key specifications at a glance

• Amperage: 150 A
• Poles: 3-Pole
• Voltage: 240 V
• Mounting: Bolt-On
• Part reference: HQJ23B150HL

Why this breaker stands out

The HQJ23B150HL is designed for quick, secure installation with bolt-on mounting, meaning faster serviceability in panels that require solid, space-saving connections. Its 3-pole design ensures simultaneous disconnection of all live conductors, enhancing safety and trip coordination for larger circuits. Constructed to meet stringent Siemens standards, this breaker provides reliable protection for heavy-load circuits such as motors, compressors, HVAC equipment, and other high-demand infrastructure components.

Ideal use cases and applications

• Retrofit or replacement in existing Siemens panels or compatible bolt-on configurations.
• Protection for 150 A circuits feeding large equipment and motor drives in commercial settings.
• Panel upgrade projects where a robust 3-pole, 240V disconnect is required to maintain system integrity.
• Maintenance scenarios where downtime needs to be minimized thanks to straightforward bolt-on installation.

Installation and compatibility guidance

Before ordering, confirm that the panel you’re working with supports bolt-on 3-pole, 240V protection and that the form factor aligns with the HQJ series. The part number HQJ23B150HL is the most reliable reference for compatibility, so cross-check it against your panel’s labeling and any OEM documentation. When installing, follow standard electrical safety practices: ensure power is fully isolated, torque connections to the manufacturer’s specifications, and verify that the trip unit coordinates correctly with adjacent overcurrent devices.

Practical considerations and maintenance tips

• Keep spare HQJ23B150HL units on hand for rapid replacements during planned maintenance or emergency outages.
• Periodically inspect mounting hardware and terminal connections for tightness and signs of corrosion or wear.
• Use only in environments within its rated voltage and current specifications to prevent nuisance trips and ensure longevity.
• Document the exact part number during service to streamline future replacements and panel audits.

Why choose Siemens HQJ23B150HL for your panels

Designed for reliability under heavy loads, the HQJ23B150HL combines Siemens’ proven protection technology with a bolt-on, space-efficient footprint. It delivers predictable trip performance, straightforward installation, and a clear path for future retrofits or panel upgrades—so you can keep critical processes online with confidence.