Siemens HQR23B150L 150A 3-Pole 240 V Circuit Breaker

Meet the Siemens HQR23B150L—a robust, three-pole circuit breaker engineered to protect demanding 3‑phase electrical systems. With a 150 A current rating and 240 V operating voltage, this unit is built to handle substantial loads while delivering reliable, clear-cut tripping when faults occur. Designed to integrate seamlessly into Siemens panels, it’s the practical choice for upgrade or new installations that demand dependable phase protection.

Key specifications

• Current rating: 150 A
• Poles: 3 (three‑phase protection)
• Voltage rating: 240 V AC
• Part number: HQR23B150L

Why this breaker stands out

• Three-pole design ensures balanced protection across all three phases, safeguarding three‑phase motors and equipment from asymmetric faults.
• High-current capability (150 A) makes it suitable for feeders and branch circuits in commercial and light industrial environments.
• 240 V operation aligns with common three‑phase power systems found in many facilities, providing reliable protection where it’s needed most.
• Siemens engineering means predictable performance, straightforward maintenance, and compatibility with existing HQR‑series panels and components.

Ideal use cases

• Main feeder protection in 3‑phase distribution boards for small to mid‑size commercial and light industrial installations.
• Protection for 3‑phase equipment and motors in HVAC, manufacturing, and processing facilities operating at 240 V.
• Replacement or upgrade in existing Siemens HQR-based installations to restore reliable circuit protection.

Installation and compatibility tips

• Verify your panel is designed to accept HQR‑series breakers and supports a 150 A, 3‑pole, 240 V device.
• Match line and load connections to the panel’s specified orientation and termination requirements.
• Follow standard wiring practices and refer to the panel’s torque specs and termination guidelines to ensure secure, code-compliant connections.
• Label the circuit clearly and perform a functional test after installation to confirm proper tripping behavior under fault conditions.

For reliable three‑phase protection with a trusted name, the Siemens HQR23B150L delivers consistent performance in a compact, drop‑in form factor. Part Number: HQR23B150L.