Siemens | HQJ23B175HL | Circuit Breaker | 175A | 3-Pole | 240V | Bolt-On

Siemens HQJ23B175HL circuit breaker is a rugged, bolt-on solution designed for demanding electrical environments. With a 175A rating across three poles at 240V, this unit delivers reliable overload and short‑circuit protection for 3‑phase power systems. It’s ideal for maintenance, retrofit, and replacement projects where exact specifications and a solid, secure fit matter.

Core specifications

• Amperage: 175 A
• Poles: 3-Pole
• Voltage: 240 V
• Mounting: Bolt-On
• Part number: HQJ23B175HL

Why this breaker stands out

• Precise fit for compatible panels: The HQJ23B175HL is specified for installations requiring a 3-pole, 240V bolt-on breaker, ensuring correct bus-bar engagement and trip characteristics when used in the right Siemens-supported panel.
• Secure bolt-on mounting: Bolt-on design provides a robust, vibration-resistant connection that stays put in harsh environments, reducing the risk of loose contacts over time.
• Balanced 3‑phase protection: With three poles handling 240V, this unit protects all phases of your three‑phase circuit, helping to prevent uneven loading and potential equipment damage.
• High‑current capacity for demanding loads: 175A is well-suited for feeders, motors, HVAC equipment, and other sizable loads that require dependable, high‑level protection.
• Replacement and retrofit ready: When you need to restore original protection specifications in a legacy panel or during a panel upgrade, this breaker offers a familiar form factor and reliable Siemens performance.

Who this is for

• Electrical contractors performing panel upgrades or retrofit projects where 3‑phase, 240V protection at 175A is required.
• Facility managers maintaining manufacturing lines, processing equipment, or large motors that demand solid, consistent protection.
• OEMs integrating reliable bolt-on breakers into custom control enclosures or built‑to‑order panels.

Installation and compatibility tips

• Verify fit and ratings first: Before purchasing, confirm that your panel accepts bolt-on breakers with the 175A / 3‑pole / 240V specifications, using HQJ23B175HL as the reference part number.
• Mounting considerations: Ensure you have the correct mounting hardware and enclosure space for a bolt-on unit, and follow the panel’s torque and mounting guidelines to maintain a solid electrical connection.
• Panel compatibility reminder: Use this unit in panels designed for Siemens HQJ‑style bolt‑on breakers and rated for 240V, 175A applications to avoid mismatches.

With the Siemens HQJ23B175HL circuit breaker, you gain dependable, three‑phase protection tailored to high‑current 240V systems—supporting safer operation, reduced downtime, and easier retrofit or replacement in industrial and commercial environments.