Siemens 3TK2825-1BB40 Sirius Soft Starter Module

Siemens 3TK2825-1BB40 Sirius Safety Relay with Relay Release Circuits (RC) is a 24 V DC safety relay intended for monitored start and safeguarding circuits in industrial automation. The 45 mm‑wide device uses screw terminals for easy wiring and provides RC contacts consisting of three instantaneous normally open contacts, with no RC‑delayed NO contacts, plus two normally closed contacts to support safety interlocks and Autostart/Monitored Start operation. As a Basic device in the SIRIUS family, it carries a maximum SIL rating of 3 and a PL rating of E, delivering reliable safety signaling for emergency‑stop, guarding, and protective door circuits. The enclosure is IP20, designed for indoor cabinet installation, and its operating temperature range is −25 to +60 °C (storage −40 to +80 °C), with a maximum installation altitude of 2,000 meters above sea level.