Siemens 3RB1246-1EG01 Overload Relay, 25-100 A, Discontinued

The 3RB1246-1EG01: The 25-100 A current range is the thermal overload setting — it protects the motor by tripping on sustained overcurrent within that window. The class 5-30 adjustment means the trip time curve can be set to match motor start-up characteristics (Class 5 is fast, Class 30 is slow for high-inertia loads). The 110-120 VAC control voltage is what the reset coil sees; verify your control transformer matches. Size S2/S3 tells you the physical footprint and terminal layout — it's designed for individual mounting, not a contactor stack, so plan DIN rail space accordingly.