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The 3120-N321-P7T1-W15FY4-5A is a 2-pole thermal circuit breaker from E-T-A. It utilizes a thermal switch mechanism for overcurrent protection in electrical circuits. This component is designed for use in circuit protection applications where reliable interruption of current is required. As a thermal breaker, it responds to heat generated by excessive current, providing resettable protection. The 2-pole configuration allows simultaneous disconnection of both live conductors.