Siemens 3RU2116-1AB1 Heavy Duty Industrial Relay

Siemens 3RU2116-1AB1 is a SIRIUS thermal overload relay (S00 size) designed to protect small motors in standalone motor-protection circuits. It provides overload protection in the 1.1–1.6 A range and is rated for up to 690 V AC, enabling use with three-phase motors up to about 0.55 kW (0.75 hp). This stand-alone relay uses screw terminals for both the main circuit and the auxiliary circuit, and it supports reset configurations that can be set to manual or automatic depending on the control scheme. As part of the Siemens 3RU2 family, it is intended for separate mounting and is compatible with Siemens motor protection assemblies and contactors to guard windings from thermal overload. It features a Class 10 tripping characteristic, providing reliable protection by interrupting current promptly when overheating occurs, and its compact S00 footprint helps save panel space in distributed motor-control layouts.