{"product_id":"square-d-ejb14030-30a-277v-1-pole-bolt-on-circuit-breaker","title":"Square D EJB14030 - 30 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eDesigned by Square D for dependable branch circuit protection, the EJB14030 is a 30A, 277V, 1-pole bolt-on molded case circuit breaker built to safeguard panelboards and load centers. Its rugged bolt-on mounting delivers a rigid, vibration-resistant connection, ensuring reliable performance in demanding electrical environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting:\u003c\/strong\u003e creates a solid bus connection that stays tight and steady through years of operation, reducing resistance changes from vibration or thermal cycling.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e combines a thermal element for gradual overload protection with a magnetic trigger for fast response to short circuits, delivering stable and repeatable protection profiles.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility:\u003c\/strong\u003e engineered to pair with matching Square D load centers and panelboards, simplifying installation, replacements, and future panel upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e277V single-pole design:\u003c\/strong\u003e ideal for commercial and light industrial applications, including lighting feeders and other 277V branch circuits where consistent protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart Number: EJB14030\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 30A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 277V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 1\u003c\/li\u003e \u003cli\u003eMounting Style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWho benefits from this breaker? facilities and installers working with 277V electrical feeds in commercial settings, offices, retail spaces, and light industrial environments where reliable, repeatable protection is critical. If you’re upgrading a panelboard or replacing a damaged breaker in a Square D installation, the EJB14030 provides OEM-aligned performance and a straightforward bolt-on installation.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003ePractical impact\u003c\/strong\u003e:\n- You get a secure, vibration-resistant connection that maintains consistent electrical contact over time.\n- The dual-stage protection of the thermal-magnetic trip unit minimizes nuisance trips while delivering rapid fault interruption when needed.\n- Real-world compatibility reduces integration risk and supports smooth maintenance and future panel expansions.\u003c\/p\u003e \u003cp\u003eTip: Always confirm panelboard compatibility and adhere to local electrical codes. Engage a licensed electrician for installation and testing to ensure safe, compliant operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355206439074,"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_9f02e38c-121b-4103-b304-d8728ab0758c.png?v=1764690349","url":"https:\/\/www.ampstate.com\/products\/square-d-ejb14030-30a-277v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}