Siemens 3RA21254AD260BB4 Combination Motor Starter

Siemens 3RA21254AD260BB4 Combination Motor Starter is a direct-on-line motor starter with integrated overload protection, designed for control via a 24 V DC coil and for motor loads in the 11–16 A range. This all-in-one device combines a motor starter protector and a contactor in a single enclosure, simplifying wiring and panel layout for small-to-medium motors used in automation equipment. The 24 V DC control coil enables easy interfacing with standard automation controllers, while the built-in overload protection guards the motor against overload and overheating during operation. The 3RA series is Siemens’ line of motor starters that provide switching and protection in one compact package, and this variant is identified by the 3RA21254AD260BB4 part number (with the AD260BB4 suffix). Its compact footprint and integrated design make it suitable for installation in control cabinets where reliable motor start-up and thermal protection are required.