Reversing starter with bimetal motor protection
The Siemens 3RK4353-3LR58-1BA0 is a SIRIUS reversing motor starter designed for on-site MCU-controlled operation.
Rated current and trip class
At 400 V AC-3, the unit delivers 6.3 A continuous — this is the load current for a motor up to roughly 3 kW at 400 V. The CLASS 10 trip characteristic means the bimetal overload releases within 10 seconds at 600% of the set current, matching the thermal capacity of standard induction motors during a locked-rotor event. The operating voltage range spans 340 to 440 V AC, with a control supply rated 184–253 V at 50 Hz and 196–253 V at 60 Hz. The supply voltage type is AC throughout.
Enclosure and mounting flexibility
Rated IP55, the enclosure protects against dust ingress and low-pressure water jets — suitable for installation in industrial environments where washdown or airborne particulates are present. The unit measures 145 mm deep, 182 mm wide, and 220 mm high, fitting standard panel layouts with a vertical mounting surface.