Siemens HQR22B125 125A 240V 2-Pole Bolt-On Circuit Breaker

The Siemens HQR22B125 is a rugged, 125A, 240V, 2-pole bolt-on molded-case circuit breaker designed to protect your electrical distribution system with precision and reliability. Built for dependable branch-circuit overcurrent and short-circuit protection, it’s a trusted choice for panelboards and loadcenters across residential, commercial, and light industrial settings.

Why this breaker stands out

• Bolt-on mounting for a secure connection: The bolt-on design creates a rigid, vibration-resistant bus connection, minimizing loosening risks in environments with movement or vibration.
• Thermal-magnetic trip unit: A dual-action protection system that provides stable overload protection with a fast magnetic response to short circuits, helping to prevent damage to wiring and equipment.
• OEM-compatible versatility: Engineered to pair seamlessly with matching Siemens loadcenters and panelboards, ensuring straightforward installation and dependable performance.
• Broad applicability: Ideal for residential panels, commercial distribution boxes, and light industrial applications where reliable branch-circuit protection is essential.

Technical details at a glance

• Manufacturer: Siemens
• Part Number: HQR22B125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

How it helps you in real-world scenarios

Replacing a worn or undersized breaker in a Siemens panelboard? The HQR22B125 is purpose-built for compatibility and performance in OEM environments, reducing downtime and ensuring consistent protection. Installing new or upgrading a circuit that demands robust protection for high-load branches becomes straightforward with a breaker designed for secure mounting and reliable trip behavior.

Who benefits most

• Property owners and facility managers maintaining residential or small to mid-sized commercial spaces
• Electrical contractors seeking a dependable, drop-in solution for Siemens panelboards and compatible OEM panels
• Maintenance teams in light industrial settings that require stable protection for critical distribution circuits

Practical guidance and tips

When selecting this breaker, confirm that your panelboard is rated for 125A and supports a bolt-on, 2-pole configuration. For installation, follow the panel manufacturer’s torque specifications to ensure a solid bus connection. Keep in mind that the thermal-magnetic trip unit provides reliable protection under a range of operating temperatures, making it suitable for environments where electrical loads vary throughout the day.

Bottom line

The Siemens HQR22B125 delivers precise, durable protection for branch circuits in panelboards and loadcenters. With secure bolt-on mounting, a dependable thermal-magnetic trip, and OEM-compatible design, it’s a strategic choice for reliable electrical distribution in homes, commercial spaces, and light industrial facilities where protection and peace of mind matter.