Siemens OLR0100CC0 Overload Relay

OLR0100CC0 is a Siemens Allis-Chalmers overload relay used in motor-control circuits to protect small motors from overload conditions. It is configured for a current setting range of 0.63 to 1.0 A, enabling precise protection thresholds within compatible contactor assemblies in legacy Siemens Allis-Chalmers drives. This part number is associated with Siemens Allis-Chalmers equipment and remains part of the historical protection lineup for older installations where fixed-range overload relays were standard. The model is listed as discontinued by the manufacturer, which means new units are scarce and buyers typically source from secondary distributors or surplus channels. As a direct replacement for aging equipment, OLR0100CC0 helps maintain the original protection scheme in legacy Siemens Allis-Chalmers starters; buyers should verify that their motor’s full-load current falls within the 0.63–1 A range before purchasing to ensure proper protection and coordination with the accompanying contactor.