1SCA022353R4970

ABB OA1G10 – Part No. 1SCA022353R4970 is a single Normally Open (1NO) auxiliary contact used for remote indication, electrical interlocking, PLC feedback, signaling, control logic, and switch-position monitoring. ABB specifies OA1G10 as an early-break contact in several OTM applications, meaning the auxiliary contact changes state before the main power contacts during switching. This is useful in transfer-switch and interlocking circuits where control logic must react before the main switching sequence is completed.