{"product_id":"siemens-bq3b09000s01-90a-240v-3-pole-bolt-on-circuit-breaker","title":"Siemens BQ3B09000S01 - 90 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens BQ3B09000S01—a 90A, 240V, 3-pole bolt-on molded case circuit breaker engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to withstand the rigors of real-world electrical systems, it stays secure and reliable under vibration and routine maintenance cycles.\u003c\/p\u003e \u003ch3\u003eWhat sets it apart\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical performance even in demanding installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection across varying load conditions, responding quickly to short circuits while minimizing nuisance trips on normal motor inrush.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole, 90A at 240V\u003c\/strong\u003e design is ideal for 3-phase distribution and feeders, delivering precise protection for commercial and light industrial circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e works seamlessly with matching Siemens OEM load centers and panelboards, simplifying replacement and upgrades without sacrificing performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suited for residential, commercial, and light industrial environments, from emergency feeders to motor-driven equipment protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading existing Siemens panelboards or load centers to enhance branch-circuit protection for 3-phase feeders.\u003c\/li\u003e \u003cli\u003eProtecting feeders that power motors, HVAC equipment, compressors, pumps, and other three-phase loads in light industrial settings.\u003c\/li\u003e \u003cli\u003eNew installations requiring a robust 3-pole breaker with reliable thermal-magnetic protection and secure mounting.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number\u003c\/strong\u003e: BQ3B09000S01\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating\u003c\/strong\u003e: 90 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles\u003c\/strong\u003e: 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting Style\u003c\/strong\u003e: Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplications\u003c\/strong\u003e: Branch circuit overcurrent and short-circuit protection in panelboards and load centers\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance for best results\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eEnsure the unit is paired with compatible Siemens OEM panelboards or load centers to maintain listing and performance integrity.\u003c\/li\u003e \u003cli\u003eUtilize the secure bolt-on mounting to achieve a rigid connection and minimize vibration-related wear over time.\u003c\/li\u003e \u003cli\u003eConsider the 90A rating when sizing feeders and downstream conductors to optimize protection without unnecessary interruptions.\u003c\/li\u003e \u003cli\u003eIn environments with frequent inrush or motor start-ups, the thermal-magnetic trip helps balance protection with operational reliability, reducing nuisance trips.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349766852770,"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_020abd59-399b-4511-b435-c2f1e88f785d.png?v=1764156214","url":"https:\/\/www.ampstate.com\/products\/siemens-bq3b09000s01-90a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}