Siemens HQR22B125L - 125 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens HQR22B125L is a robust 125 A, 240 V, 2-pole bolt-on molded case circuit breaker designed to safeguard your electrical panelboard or loadcenter from overcurrent and short-circuit faults. Built for dependable, long-term performance in residential, commercial, and light industrial environments, it delivers reliable protection where it matters most—the branch circuitry that powers your daily operations.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing connection fatigue and ensuring consistent protection even in environments with equipment vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection by accurately responding to both sustained overcurrents and short-term surges, helping to prevent nuisance trips while guarding wiring and devices.
• OEM-compatible design is engineered to fit matching Siemens loadcenters and panelboards, simplifying replacement and maintenance without sacrificing performance or safety.
• Versatile application range from home electrical panels to commercial suites and light industrial spaces, providing dependable branch circuit protection across diverse settings.
• 125 A, 240 V, 2-pole configuration offers ample rating for high-demand circuits while maintaining compact, field-installable form factor.

Use cases and practical deployment

Ideal for replacing aging or damaged breakers in existing Siemens panelboards, the HQR22B125L ensures quick, secure upgrades that restore full protection. In residential settings, it guards feeders and branch circuits against overloads caused by high-draw appliances or multiplier loads. In commercial applications, it supports subpanels and distribution circuits where steady protection and reliable trip behavior are essential. In light industrial environments, it withstands routine vibrations and electrical noise while maintaining precise trip characteristics.

Technical snapshot

• Manufacturer: Siemens
• Part number: HQR22B125L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 125 A
• Voltage rating: 240 V
• Number of poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

What you gain with Siemens HQR22B125L

With this breaker, you’re investing in predictable protection behavior, easier serviceability, and a seamless fit within compatible Siemens systems. Its rigid bolt-on mounting and reliable thermal-magnetic trip mechanism reduce downtime and maintenance headaches, helping you keep critical circuits protected with confidence. Whether upgrading a panelboard, expanding a loadcenter, or replacing a failed unit, the HQR22B125L delivers consistent performance you can trust.