Reversing motor starter with AS-Interface bus communication
The 3RK4320-3BQ54-1BA3: The bimetal motor protection is set to CLASS 10 trip characteristic, providing overload protection for standard motor starting profiles without nuisance tripping.
AC-3 motor switching and thermal limits
At AC-3 duty (cage motor starting/switching) the rated operational current is 0.8 A at 400 V — this is the load current the starter handles during motor start and run, not a resistive-heating rating. The operating frequency is rated at 80 cycles per hour minimum, which governs the thermal recovery between starts; exceeding this rate without derating risks bimetal drift and premature trip. Ambient temperature range of -25 to +50 °C defines the enclosure environment — above 50 °C the bimetal trip curve shifts and the starter must be derated per the manufacturer's curve.
Panel integration and mounting flexibility
The enclosure measures 205 mm deep, 245 mm wide, and 215 mm high, with IP54 protection suitable for control cabinets in industrial environments where dust and splash ingress is expected. The unit includes a motor brake output (400 V AC) and short-circuit protection via circuit-breakers, reducing external component count in the panel.
Lifecycle and sourcing posture
Substance prohibition compliance is dated 05/01/2012, confirming RoHS/REACH adherence per the manufacturer's declaration.