ABB 1SAR212100R0251 is a R1541 Sigma interface relay used to convert a low-power control signal into higher-current switching for loads up to 6A. With a 1W coil, it provides reliable actuation while isolating the control circuit from the load circuit, a common requirement in industrial automation and machine control panels. The part number identifies ABB’s R1541 family and specifies the Sigma interface relay configuration for this 6A, 1W variant.
