{"product_id":"siemens-hqr23b125l-125a-240v-3-pole-bolt-on-circuit-breaker","title":"Siemens HQR23B125L - 125 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003eSiemens HQR23B125L - 125 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState Designed for dependable branch circuit protection in panelboards and loadcenters, the Siemens HQR23B125L is a rugged 3-pole molded case breaker built to handle demanding electrical environments. With a 125 A rating at 240 V, this bolt-on unit delivers precise, reliable protection for three-phase circuits in residential, commercial, and light industrial applications. Why this breaker matters\n- Secure bolt-on mounting: A rigid, vibration-resistant bus connection minimizes loosening and improves continuity in installations exposed to vibration, temperature cycling, or heavy equipment operation.\n- Stable thermal-magnetic protection: The integrated thermal-magnetic trip unit responds consistently to overloads and short circuits, reducing nuisance trips while delivering fast clearing when faults occur.\n- OEM-compatible reliability: Specifically engineered to work with matching Siemens loadcenters and panelboards, ensuring proper fit, coordination, and long-term performance.\n- Versatile three-pole design: Ideal for three-phase feeders and branch circuits, enabling safe distribution in commercial spaces and light industrial environments.\n- Practical 125 A, 240 V rating: Provides robust protection for circuits and equipment sized for medium-load applications, while maintaining compatibility with standard Siemens panel infrastructure. Who benefits\n- Electricians and facility managers replacing aging or failed breakers in Siemens panelboards.\n- Contractors upgrading service panels in small commercial installations or multi-unit residential buildings.\n- Maintenance teams seeking dependable, long-life protection for light industrial equipment and machinery with three-phase power. What problems it solves\n- Prevents costly damage from overcurrent and short circuits by providing predictable, repeatable trip characteristics.\n- Maintains connection integrity in environments with vibration or frequent equipment start\/stop cycles.\n- Ensures seamless integration with existing Siemens panel ecosystems, avoiding cross-brand compatibility issues. How it compares to alternatives (without naming competitors)\n- Bolt-on vs. plug-on: The bolt-on design offers a more secure, vibration-resistant bus connection, reducing the risk of intermittent contacts that can occur with looser, plug-on styles.\n- Molded case durability: The molded-case construction is designed to stand up to routine electrical work, temperature swings, and mechanical stress, providing reliable performance over time compared to simpler enclosures. Specific use cases and scenarios\n- Upgrading a three-phase feeder in a commercial loadcenter to handle increased load while preserving the original Siemens control scheme.\n- Replacing a worn-out 3-pole breaker in a residential-turned-commercial space that requires reliable 125 A protection for a shared electrical system.\n- Protecting motor starters, HVAC controls, or lighting gear in light industrial settings where robust, vibration-tolerant connections are essential. Specifications at a glance\n- Manufacturer: Siemens\n- Part Number: HQR23B125L\n- Type: Thermal-magnetic molded case circuit breaker\n- Amperage Rating: 125 A\n- Voltage Rating: 240 V\n- Number of Poles: 3\n- Mounting Style: Bolt-on\n- Application: Branch circuit overcurrent and short-circuit protection AmpState presents the Siemens HQR23B125L as a purpose-built solution for dependable, long-lasting circuit protection. If you’re seeking a compatible, high-performance 3-pole bolt-on breaker that integrates seamlessly with Siemens panel systems, this unit delivers the dependable protection your electrical system requires.\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349813907618,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_58090b00-fee2-44fc-9685-e4a6ff409a50.png?v=1764157584","url":"https:\/\/www.ampstate.com\/products\/siemens-hqr23b125l-125a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}