The Siemens 3RB1015-1NB0 is an electronic overload relay in the SIRIUS family, rated for a current range of 0.4...1.6 A. The relay uses screw terminals and is designed for direct mounting onto a contactor, saving DIN-rail space in the panel. Reset is manual only — no auto-reset option, so it stays tripped until an operator clears the fault.
Deployment Context
This relay snaps onto a contactor in the SIRIUS S00 frame, keeping the motor starter compact inside a control panel. The manual-reset-only configuration is typical for applications where an automatic restart after a trip would be a safety concern — conveyors, fans, or pumps that must not re-energize without a deliberate operator action.