{"product_id":"siemens-e42b030-circuit-breaker","title":"Siemens | E42B030 | Circuit Breaker | 30A | 2-Pole | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens E42B030 30A 2-Pole Bolt-On Circuit Breaker is built to deliver reliable overcurrent protection in maintenance, retrofit, and replacement projects where precise compatibility matters. This bolt-on breaker is designed to fit Siemens panels and enclosures that require a two-pole, 30-amp unit with a secure bolt-on mounting.\u003c\/p\u003e \u003cp\u003eKey specifications:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 30A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e E42B030\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eNotes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eUnlike plug-in counterparts, this bolt-on design offers a solid mechanical attachment that stays secured under demanding electrical panel conditions. The 2-pole layout ensures simultaneous disconnection of both live conductors, which is essential for 240V circuits and equipment that require full isolation.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and service of existing Siemens bolt-on panels that specify 30A, 2-pole protection.\u003c\/li\u003e \u003cli\u003eRetrofit projects where matching the exact part reference E42B030 is critical to maintain panel labeling and trip characteristics.\u003c\/li\u003e \u003cli\u003eReplacement of worn or damaged breakers in systems that demand a precise, OEM-compatible bolt-on solution.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation tips and best practices\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePower down the panel and verify zero voltage on the line before installation.\u003c\/li\u003e \u003cli\u003eEnsure the bolt-on mounting is clean and free of debris to maximize contact integrity.\u003c\/li\u003e \u003cli\u003eUse the manufacturer's torque specifications to secure the mounting hardware (avoid over-tightening).\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat you can expect\u003c\/h3\u003e\n\u003cp\u003eWith this Siemens E42B030 breaker, you gain dependable protection for circuits demanding a 30-amp capacity and two-pole isolation. Designed for retrofit and replacement workflows, it helps minimize downtime and ensures the panel continues to meet safety and code requirements with an authentic Siemens replacement part.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46424777982114,"sku":"E42B030","price":310.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-e42b030-circuit-breaker-30a-2-pole-bolt-799.webp?v=1789413382","url":"https:\/\/www.ampstate.com\/products\/siemens-e42b030-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}