{"product_id":"square-d-hja36125sa-125a-600v-3-pole-plug-in-circuit-breaker","title":"Square D HJA36125SA - 125 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D HJA36125SA—a 125 A, 600 V, 3‑Pole plug‑in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short‑circuit protection in panelboards and load centers. Built for quick life‑cycle service, it pairs robust electrical protection with streamlined installation that keeps downtime to a minimum.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug‑in connection\u003c\/strong\u003e: simplifies installation and replacement, cutting labor time and reducing risk during panel maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal‑magnetic trip unit\u003c\/strong\u003e: dual protection that responds to overload (thermal) and short‑circuit (magnetic) events with stable, repeatable trip characteristics for predictable performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3‑pole, 600 V design\u003c\/strong\u003e: ideal for three‑phase distribution in commercial and light industrial environments, providing coordinated protection across all phases and the neutral where applicable.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM‑grade compatibility\u003c\/strong\u003e: engineered to fit Square D OEM load centers and panelboards, ensuring reliable operation and straightforward retrofits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRugged molded‑case construction\u003c\/strong\u003e: built to withstand the demands of everyday electrical service in a variety of settings—from busy service panels to control rooms.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart Number: HJA36125SA\u003c\/li\u003e \u003cli\u003eType: Thermal‑magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 125 A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 600 V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 3\u003c\/li\u003e \u003cli\u003eMounting Style: Plug‑in\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short‑circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases and scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eProtect 3‑phase branch circuits in commercial panelboards and light industrial load centers up to 600 V.\u003c\/li\u003e \u003cli\u003eUpgrade or replace aging breakers in Square D panels with a plug‑in solution that minimizes panel downtime.\u003c\/li\u003e \u003cli\u003eInstall in new electrical rooms where reliable short‑circuit protection and simple serviceability are priorities.\u003c\/li\u003e \u003cli\u003ePart of a maintenance kit for facilities with frequent panel servicing, where quick plug‑in replacement reduces contractor time on site.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical installation and care tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eConfirm panel compatibility: use only in Square D OEM panels designed for plug‑in molded case breakers to ensure safe, reliable operation.\u003c\/li\u003e \u003cli\u003ePower down and follow standard safety practices before replacing or installing the breaker.\u003c\/li\u003e \u003cli\u003eKeep a spare HJA36125SA on hand for planned maintenance or rapid replacements to minimize downtime.\u003c\/li\u003e \u003cli\u003eHandle with care to avoid damage to the molded case and trip mechanism; keep the terminals clean and free of debris for optimal connection quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355291930786,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_317af401-1370-4710-8630-4e95e8f70fbf.png?v=1764690984","url":"https:\/\/www.ampstate.com\/products\/square-d-hja36125sa-125a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}