{"product_id":"industrial-tb390","title":"Industrial TB390 90A 3-Pole 240 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eThe Industrial TB390 90A 3-Pole 240 V Circuit Breaker is a purpose-built protection device designed for demanding three-phase power environments. With the part number TB390, this breaker delivers reliable overcurrent protection for critical industrial circuits while simplifying maintenance and replacements in established systems.\u003c\/p\u003e \u003cp\u003eWhy this TB390 matters in real-world setups: a balanced, three-pole design protects all phases equally in 240 V power distribution, helping prevent motor stalls, damaged feeders, and unexpected downtime. The 90 A current rating is suited for mid-size industrial circuits, offering precise protection without unnecessary nuisance trips. This combination makes it a practical choice for machine controls, drives, conveyors, pumps, and other three-phase equipment that rely on stable, 240 V power.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eCurrent rating: 90 A\u003c\/li\u003e \u003cli\u003ePoles: 3 (three-pole)\u003c\/li\u003e \u003cli\u003eVoltage rating: 240 V\u003c\/li\u003e \u003cli\u003ePart number: TB390\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eUnique value and practical benefits\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eFocused protection for three-phase circuits: by guarding all three legs, it helps maintain balanced loading and consistent performance across your equipment.\u003c\/li\u003e \u003cli\u003ePart-number precision: TB390 enables straightforward replacement and compatibility with existing panels and field-installed switches, reducing downtime during upgrades or maintenance.\u003c\/li\u003e \u003cli\u003eIndustrial reliability: designed for continuous operation in demanding environments, providing dependable interruption protection where downtime is costly.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eThree-phase distribution panels in manufacturing floors, packaging lines, or assembly cells\u003c\/li\u003e \u003cli\u003eMotor feeders and drives powered by 240 V three-phase supplies\u003c\/li\u003e \u003cli\u003eMid-size equipment circuits where 90 A protection is appropriate and space-saving, three-pole protection is required\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and care tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eVerify panel compatibility and ensure the bus configuration matches a three-pole 240 V protection device before installation.\u003c\/li\u003e \u003cli\u003eWire conductors and terminals to the appropriate gauge for a 90 A circuit, tightening per the panel or breaker manufacturer’s torque specifications.\u003c\/li\u003e \u003cli\u003eFollow standard lockout\/tagout procedures during replacement or maintenance to keep personnel safe.\u003c\/li\u003e \u003cli\u003eKeep a record of the part number (TB390) for future replacements or upgrades to maintain consistency across the electrical system.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eFor teams maintaining industrial reliability, the TB390 90A 3-Pole 240 V Circuit Breaker offers focused, phase-balanced protection with a clear part-numbered path for replacement. It’s a practical, durable choice for mid-size three-phase circuits where stable 240 V output and dependable fault isolation matter most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Industrial","offers":[{"title":"Default Title","offer_id":46423281139874,"sku":"TB390","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\/industrial-tb390","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}