What this output reactor does on a VFD line
The Siemens SIDAC 4EU2432-0ED00-4BA0 is a 3-phase AC output reactor (output choke) sized for variable-frequency drive applications. It sits between the drive output and the motor, limiting the rate of voltage rise (dV/dt) and reducing reflected-wave peaks on long cable runs — a common cause of motor insulation stress in PWM-driven systems. Rated for a maximum continuous current of 56 A and a switching frequency of 4.2 kHz, it handles the pulse train a modern IGBT drive produces. The 0.1 mH inductance (LN) and 12.7% impedance (UK) give it enough choke action to smooth the drive's output without dropping excessive voltage under load.
Thermal class and enclosure — where it goes
Thermal class H insulation (IEC 60085) means the winding can sustain a 180 °C hot-spot temperature — standard for reactor duty where the core runs warm from the switching harmonics. Rated ambient is 40 °C; derate above that per the thermal curve. The IP00 enclosure is open-frame, so this reactor belongs inside a ventilated cabinet or a dedicated drive cubicle — not in a washdown or dusty environment.