Weidmueller TRS 120VACRC 1COAU C1D2

The TRS 120VACRC 1COAU C1D2 is likely an industrial relay with a 120V AC operating voltage, and "RC" may indicate it has a built-in resistor-capacitor (RC) network for surge protection or noise suppression. It features a single changeover (1CO) contact, allowing it to switch between normally open and normally closed positions. The "AU" designation could refer to a specific feature or material type, while "C1D2" indicates the relay is certified for use in hazardous environments (Class 1, Division 2), where flammable gases or vapors might be present. For more precise details, it's best to consult the manufacturer's datasheet.