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Schneider’s A9F08420 is a 40A, type 1, 3-pole, molded-case circuit breaker. This particular model is part of the company’s Zenith XT range and is rated for up to 480/277V AC. It features trip curves, a thermal-magnetic trip mechanism, and a UL/cUL listing. The breaker also has a long-term and short-term ratings of 100kA. Additionally, the A9F08420 complies with all relevant safety standards, making it a reliable, high-performance breaker.