Siemens 3RF2120-2AA02 Solid State Relay 24VDC

Siemens 3RF2120-2AA02 is a single-phase solid-state relay from the SIRIUS 3RF2 family that switches AC loads across a 24–230 VAC range with a 20 A continuous current rating, controlled by a 24 V DC input signal. The compact module is 22.5 mm wide and uses spring-type terminals for straightforward wiring, designed for installation in standard control panels and compatible with the 3RF2 mounting footprint. This SSR delivers quiet, fast switching for 1-phase automation tasks, providing isolation between the 24 V control circuit and the high-voltage AC load. Built for industrial environments, the device carries an IP20 enclosure rating and is part of Siemens’ modular approach to bridging low-voltage control logic to higher-voltage AC loads in compact automation architectures. Ideal for compact control applications where a reliable, maintenance-friendly solid-state alternative to mechanical relays is desired, this model offers a straightforward path to efficient, contactless switching of AC loads in automation panels.