Uses an RC circuit (resistor-capacitor snubber) rated for 24...48 V AC 50/60 Hz control circuits, with a maximum peak voltage of 3 Uc at up to 400 Hz. Complies with IEC 60947-5-1, the standard for control circuit devices and switching elements, so it's a drop-in for panels built to that spec.
Clip-on mounting to the front of the contactor — no DIN rail footprint consumed, no extra wiring space needed beyond the contactor itself. Measures 44 mm wide by 33 mm deep, IP20 finger-safe per IEC 60529. The TH protective treatment per IEC 60068 means it handles humid or mildly corrosive atmospheres typical in industrial control panels.
