It accepts AC control supply voltages from 127 to 240 V at 50 Hz or 240 to 127 V at 60 Hz, and DC from 150 to 250 V. The varistor absorbs the inductive kick when the coil de-energizes, protecting nearby PLC outputs and extending contactor life.
This suppressor clips directly onto the front of a SIRIUS S00 contactor or motor starter — no tools, no additional wiring space needed. The clip-on fastening method and any mounting position mean it fits into the same DIN-rail footprint as the contactor itself. At 9 mm deep, 28 mm wide, and 46 mm tall, it adds negligible depth to the assembly, which matters when panel depth is tight or when the contactor sits behind a door or cover.
The AC voltage range (127-240 V at 50 Hz, 240-127 V at 60 Hz) and DC range (150-250 V) define the coil voltage this suppressor is designed to clamp. If your contactor coil is 24 VDC or 110 VAC, this is the wrong part — look at the 3RT2916 family for lower-voltage variants. The varistor design means it handles repetitive surge energy without wearing out as quickly as an RC snubber on high-cycle applications, though it does have a finite energy rating (not listed here). The S00 size constraint is absolute: this suppressor physically mates only with S00-frame SIRIUS contactors and starters, not S0 or S2 frames.