Siemens 3RF2150-1AA06 Safety Relay Module

Siemens SIRIUS 3RF2150-1AA06 is a 1‑pole semiconductor relay (solid‑state relay) from the 3RF2 family designed for high‑current AC switching. It supports a load current of up to 50 A with a load voltage range of 48 to 600 V AC, while the coil input is 24 V DC, enabling control from standard DC logic circuits. The device presents a single normally open (1NO) contact form and uses screw terminals for wiring, with a modular width of 22.5 mm to fit compact control panels. It employs zero‑cross (zero‑point) switching to minimize electrical transients when energizing or de‑energizing loads. This relay is typically used in automation and machine control applications to switch substantial AC loads—such as motors or heaters—under a 24 V DC control signal, offering reliable, solid‑state isolation and fast switching without mechanical wear.