Siemens Industry, Inc. 3RU2116-1DB0 Overload Relay

The Siemens Sirius 3RU2116-1DB0 overload relay is a 3‑pole thermal overload device (Size S00) for motor protection, adjustable from 2.2 to 3.2 A and rated Class 10. It mounts on Siemens Sirius 3RT contactors and is designed to protect small motors by interrupting the main circuit when the current exceeds the set value. The relay features screw terminals for both the main circuit and the auxiliary circuit and supports Manual, Automatic, or Reset operation. It is compatible with 3RT series contactors such as 3RT2015, 3RT2016, 3RT2017, and 3RT2018, and has a compact footprint around 87 x 45 mm. The unit weighs 0.157 kg and includes one normally closed and one normally open auxiliary contact in its configuration. This overload relay is part of the Siemens Sirius 3RU2 family, providing reliable motor protection with a 2.2–3.2 A setting range and Class 10 thermal trip characteristics for demanding industrial environments.