Siemens Contactor relay, screw, size S00, 2NO + 2NC, 42VDCProduct Overview The 3RH2122 1BD40 is a contactor relay featuring 2 NO + 2 NC contacts, 42 V DC operation, screw terminal connections, and frame size S00. This auxiliary contactor from the SIRIUS 3RH2 series is designed for switching control signals in control circuits, offering reliable performance in industrial automation applications with lower voltage DC systems. Key Features Contact Configuration: 2 normally open (NO) contacts and 2 normally
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