{"product_id":"siemens-b145-45a-120v-1-pole-bolt-on-circuit-breaker","title":"Siemens B145 - 45 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003eThe Siemens B145 is a dependable 1-pole, 45A bolt-on molded case circuit breaker designed to protect your electrical distribution with precision. Built for reliable branch-circuit overcurrent and short-circuit protection, it’s the right choice for panelboards and load centers where solid performance and secure connections matter. Key benefits that set the B145 apart\n- Secure bolt-on mounting: locks onto the bus connection for a rigid, vibration-resistant fit that maintains consistent electrical contact and reduces the risk of loose connections over time.\n- Thermal-magnetic protection: combines thermal overload sensing with magnetic short-circuit fast-tripping, delivering stable, repeatable protection under diverse load conditions.\n- Direct compatibility: engineered to pair with matching Siemens OEM load centers and panelboards, ensuring a clean, code-compliant installation.\n- Versatile applications: ideal for residential, commercial, and light industrial environments where dependable protection for branch circuits is essential.\n- Straightforward replacement: part of the Siemens B-series, providing a straightforward option for upgrading or replacing aging or non-functioning breakers in existing Siemens systems. Why choose the Siemens B145 for your electrical system\nIf you’re upgrading a panelboard or load center that requires a trustworthy, bolt-on, single-pole solution, the B145 delivers. Its 45A rating is well-suited for branch circuits that demand solid protection without overreacting to normal inrush or transient spikes. The 120V rating aligns with standard low-voltage residential and light commercial circuits, making it a practical, compatible choice for many installations. Specifications at a glance\n- Manufacturer: Siemens\n- Part Number: B145\n- Type: Thermal-magnetic molded case circuit breaker\n- Amperage Rating: 45A\n- Voltage Rating: 120V\n- Number of Poles: 1\n- Mounting Style: Bolt-on\n- Application: Branch circuit overcurrent and short-circuit protection Who this is for\n- Homeowners and electricians replacing a faulty or aging breaker within Siemens panelboards and load centers\n- Projects requiring a secure, vibration-resistant connection to minimize arcing and connection looseness\n- Settings where dependable magnetic trip response is needed for quick fault isolation With the Siemens B145, you gain a reliable, purpose-built solution that protects wiring, reduces downtime, and keeps your electrical system running smoothly.\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349746503842,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-b145-45-a-120-v-1-pole-bolt-on-circuit-breaker-ampstate-373.webp?v=1788720126","url":"https:\/\/www.ampstate.com\/products\/siemens-b145-45a-120v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}