The Westinghouse KA3300 is a three‑pole, 300 A molded‑case circuit breaker rated for 600 V AC, delivering reliable overcurrent and short‑circuit protection for high‑capacity three‑phase power circuits. Designed for panel‑mounted installations in switchgear, panelboards, motor control centers, and industrial electrical panels, it serves commercial and industrial electrical distribution systems. It uses a thermal‑magnetic trip mechanism to provide fast interruption for overloads and faults. Common replacements include Eaton KA3300, Cutler‑Hammer KA3300, and Square D KA36300.
