The 3RB1246-1EM00: The 25-100 A range covers a wide band of motor FLA, but the class 5-30 trip setting is what governs the actual overload protection curve. Class 5 is fast-acting for motors with short locked-rotor withstand times (e.g., submersible pumps); class 30 is slow for high-inertia loads like centrifuges or fans that take longer to accelerate. The individual-mount form factor means it does not require a separate base or adapter — it clips directly onto the contactor or a DIN rail. The AC 220-240 V control voltage is standard across European panel designs, but verify that your control transformer and coil match this voltage exactly.
Deployment Context
This relay is sized for S2/S3 contactor frames, so it integrates into a motor starter assembly in a control panel. The screw-terminal auxiliary circuit is straightforward for panel wiring. Ground-fault signaling is an additional diagnostic output — useful for monitoring leakage in wet or corrosive environments, but it is not a full ground-fault protection device (that requires a separate GFCI or RCD).