It clips directly onto the contactor coil terminals (clip-on fastening, any mounting position), so no wiring or panel space is consumed beyond the contactor footprint itself. At 28 mm wide, 46 mm tall, and only 9 mm deep, it tucks into the same DIN-rail envelope as the contactor it protects. The diode design means it handles DC coil suppression only — the 150…250 V DC range covers standard 220 VDC control circuits common in European and North American industrial panels. The built-in LED gives a quick visual of coil status, which speeds fault isolation on a live panel without reaching for a meter.
The 150…250 V DC suppression voltage range is the coil voltage, not the load voltage — this part clamps the inductive kickback from a DC contactor coil when it de-energizes. If your control supply is 24 VDC, this suppressor won't conduct properly (the diode's reverse breakdown is too high); you need the 24 V variant in the same SIRIUS family. For any DC coil between 150 V and 250 V, this is the correct match. The S00 size designation means it mates mechanically with Siemens S00 contactors (3RT2xxx series) and S00 motor contactors. The clip-on mount engages the coil terminals directly — no additional bracket or wiring. The 9 mm depth keeps the assembly within the same 45 mm or 28 mm wide contactor body, so panel fill factor stays tight. Operating temperature range of -25…+60 °C and storage range of -40…+80 °C cover most indoor industrial environments without derating. The substance prohibitance date of 10/01/2009 indicates RoHS compliance per EU Directive 2002/95/EC.