The 3RT2926-3AB31 is a latching block manufactured by Siemens. It is part of the 3RT20 series and has a size of S0, with screw terminals for connections. It is designed for use in control circuits with currents up to 3A. The latching feature allows it to remain in its current state without the need for continuous power. It features integrated LED-status displays, short-circuit and overload protection, and has a compact size for easy installation.