Siemens | HQJ23B175H01S11 | Circuit Breaker | 175A | 3-Pole | 240V

Meet the Siemens HQJ23B175H01S11 Circuit Breaker — a robust three-pole protection device designed for demanding commercial and industrial electrical systems. With a 175-amp rating and 240-volt operation, it provides dependable safeguarding for large three-phase loads, helping to prevent damage from overloads and electrical faults while keeping your distribution system energized when conditions are normal.

Key compatibility and fit — this unit is identified by part number HQJ23B175H01S11, and is tailored for maintenance, retrofit, and replacement needs where exact spec alignment matters. Before purchasing, confirm the panel’s compatibility with the HQJ series and verify that the install ratings match your service requirements. The part number is the most reliable reference for ensuring a correct fit.

• Amperage: 175A
• Poles: 3-Pole
• Voltage rating: 240V
• Series/ref: HQJ family (HQJ23B175H01S11)

This 3-pole, 240V breaker is ideal for protecting large three-phase circuits in commercial spaces, industrial equipment rooms, and service panels that feed substantial loads like motors, compressors, and other heavy-duty machinery. By interrupting current flow during abnormal conditions, it helps minimize wiring damage, reduces downstream equipment risk, and supports safer, more reliable power distribution.

Why choose this Siemens breaker? It’s purpose-built for compatibility with Siemens panels that support the HQJ lineup, offering a precise fit that streamlines retrofits and replacements. Its 175A capacity is well-suited for feeders and main-lacings in systems where a higher current rating is required, delivering strong protection without compromising system continuity in normal operation.

Practical use cases include upgrading a panel to accommodate increased load from upgraded machinery, replacing a failing breaker in an existing Siemens installation, or retrofitting a three-phase distribution run to better manage peak demand. It’s especially relevant for facilities that rely on stable, three-phase power delivery and need a reliable, field-identified component for ongoing maintenance schedules.

If you’re configuring or maintaining a Siemens-based protection scheme, this HQJ23B175H01S11 unit provides a precise, dependable fit for 3-pole, 240V circuits up to 175A. Align the part number with your panel labeling and service plan, and you’ll have a straightforward path to safe, consistent electrical protection.