{"product_id":"siemens-j3b090","title":"Siemens J3B090 90A 3-Pole 240 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens J3B090 is a rugged, dependable protection solution for 3‑phase systems. This \u003cstrong\u003e90 A\u003c\/strong\u003e, \u003cstrong\u003e3‑pole\u003c\/strong\u003e circuit breaker delivers reliable overcurrent protection at \u003cstrong\u003e240 V\u003c\/strong\u003e, helping safeguard motors, feeders, and other critical equipment in commercial and light industrial environments. With the part number \u003cstrong\u003eJ3B090\u003c\/strong\u003e, you’re choosing a trusted Siemens component designed to integrate smoothly into compatible panels and protection schemes.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 90 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePole configuration:\u003c\/strong\u003e 3-pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand\/part:\u003c\/strong\u003e Siemens J3B090 circuit breaker\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this 3‑pole breaker matters\u003c\/h3\u003e\n\u003cp\u003eIn three‑phase distributions, a 3‑pole breaker cuts all active conductors together when an overcurrent or fault occurs. That synchronized shutoff minimizes damage, reduces downtime, and protects valuable machinery such as compressors, pumps, and conveyors. Siemens’ engineering behind the J3B090 translates to predictable trip behavior, dependable performance, and a compact form factor that fits neatly into standard Siemens panels.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMotor circuits for HVAC units, pumps, and industrial fan systems that run on 3‑phase 240 V\u003c\/li\u003e \u003cli\u003eFeeder protection for small‑ to mid‑sized distribution panels in workshops, data centers, or service rooms\u003c\/li\u003e \u003cli\u003eReplacement or retrofit in Siemens panels that require a J‑series 3‑pole breaker\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat sets it apart\u003c\/h3\u003e\n\u003cp\u003eBeyond specs, the J3B090 represents Siemens’ commitment to consistent protection performance and long‑term reliability. Its design supports stable interrupting capability under typical load profiles, improving system resilience and simplifying maintenance planning for installers and facility managers alike.\u003c\/p\u003e \u003ch3\u003eInstallation and maintenance notes\u003c\/h3\u003e\n\u003cp\u003eFollow local electrical codes and Siemens installation guidelines. Confirm that your panel accepts J‑series breakers and that the voltage and current ratings align with your distribution needs. For precise torque specifications and mounting instructions, consult the official J3B guidance from Siemens.\u003c\/p\u003e \u003ch3\u003ePractical tips for maximum uptime\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUse as primary protection for 3‑phase feeders up to 90 A to safeguard motors and equipment\u003c\/li\u003e \u003cli\u003ePair with appropriate overload protection within your panel design to maintain coordinated protection\u003c\/li\u003e \u003cli\u003eMaintain a small inventory of common spare breakers (like the J3B090) to reduce downtime during field service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46423257612450,"sku":"J3B090","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/siemens-j3b090","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}