The Siemens SIRIUS 3RT6926-5AQ01 is a replacement magnet coil for size S0 contactors, designed to be swapped in when the original coil fails or the control voltage needs changing. It's a field-replaceable component, not a complete contactor — you keep the existing contactor base and swap only the coil assembly. Rated for 380 V AC control supply at 50 Hz, with a pickup/holding range of 0.8... 1.1 times the rated voltage at 50 Hz and 0.85... 1.1 at 60 Hz. Typical power loss is 9.8 V·A at AC, which is the steady-state holding power once the contactor is sealed in.
The 380 V AC rating at 50 Hz is the nominal control voltage. The coil will pick up reliably down to about 304 V (0.8 × 380 V) and hold in up to about 418 V (1.1 × 380 V) at 50 Hz. At 60 Hz the operating band shifts slightly: 0.85 to 1.1 times the 380 V rating.