{"product_id":"square-d-nsb-fa24040ab-molded-case-circuit-breaker","title":"Square D NSB FA24040AB Molded Case Circuit Breaker","description":"\u003cdiv\u003e\u003cp\u003eThe Square D FA24040AB is a two-pole, 40 A molded‑case circuit breaker from the FA frame family, rated for 480\/277 V and configured for 2P\/1PH service with I‑Line plug‑in mounting for quick replacement in compatible Square D panels. It uses a thermal‑magnetic trip mechanism to provide overload and short‑circuit protection, and carries an 18 kA interrupting rating at 480 V to handle fault currents typical in commercial and light industrial distribution. The unit is rated for a 40 °C ambient environment and is designed for protecting feeders and branch circuits in 480Y\/277 V systems, such as lighting, motor loads, and general equipment circuits within FA‑series panelboards and enclosures. As a legacy FA MCCB, it integrates with other FA components and Square D labeling, offering dependable overcurrent protection in mid‑range applications where reliable protection and straightforward replacement are required. \u003c\/p\u003e\u003c\/div\u003e","brand":"Square","offers":[{"title":"New","offer_id":46259011485930,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-012.png?v=1788727428","url":"https:\/\/gtghardware.com\/products\/square-d-nsb-fa24040ab-molded-case-circuit-breaker","provider":"GTG Hardware","version":"1.0","type":"link"}