Siemens HQR22B125HL 125A 240V 2-Pole Bolt-On Circuit Breaker

Siemens HQR22B125HL is a rugged 125 A, 240 V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch‑circuit overcurrent and short‑circuit protection in panelboards and loadcenters. Built for demanding electrical environments, it pairs a secure bolt‑on mounting with precise protection performance to keep your circuits safe and trustworthy.

• Secure bolt‑on mounting: Provides a rigid, vibration‑resistant bus connection to maintain reliable operation in panels that experience movement or vibration.
• Thermal‑magnetic trip unit: Delivers stable, repeatable protection by responding appropriately to sustained overloads and sudden short‑circuit events, helping to prevent nuisance trips while safeguarding conductors and devices.
• 2‑pole, 125 A, 240 V: Ideal for protecting 240 V circuits and dual‑line feeders, with the simplicity of a single device handling both legs for a clean, coordinated disconnect.
• OEM‑level compatibility: Designed to be fully compatible with matching Siemens OEM loadcenters and panelboards, ensuring proper fit, coordination, and electrical performance.
• Versatile applications: Suitable for residential, commercial, and light industrial applications where reliable branch‑circuit protection and compact, robust hardware are essential.

Technical snapshot

• Manufacturer: Siemens
• Part Number: HQR22B125HL
• 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

Use cases and practical applications

Use the Siemens HQR22B125HL to protect large 240 V branch circuits in residential or commercial panelboards. It’s well suited for feeders to subpanels, heavy electrical loads like air conditioning systems, water heaters, or other high‑current equipment where a reliable, code‑compliant disconnect is required. Its bolt‑on design makes it a robust choice for panels subject to vibration or movement, reducing the risk of loose connections over time.

In upgrade or replacement scenarios, this breaker provides a straightforward path to restore proper protection within Siemens‑matched panel systems. By aligning with OEM panelboard specifications, it helps maintain consistent trip characteristics and electrical coordination across your distribution board.

Why this Siemens breaker stands out

Unlike generic replacements, the HQR22B125HL is engineered to integrate seamlessly with Siemens panelboards, delivering a trusted balance of strength, protection, and compatibility. Its thermal‑magnetic trip unit offers dependable response under varying load conditions, while the 2‑pole configuration ensures both conductors trip together for complete circuit isolation. For engineers, electricians, and facility managers looking for a reliable, long‑term protection solution, this breaker provides clarity, consistency, and performance in one compact unit.