It is the first laterally mountable design in the series, meaning it clips onto the side of the contactor without occupying additional DIN rail space — a detail that matters when you're packing contacts into a tight panel and every millimeter of rail width counts. At 10 mm wide, 64.8 mm tall, and 66 mm deep, it tucks into the same envelope as the contactor itself. The IP20 front protection is standard for enclosed panel gear — no washdown rating here, so keep it behind a gland plate or enclosure door.
It carries a mirror contact per IEC 60947-4-1 when used with 3RT2 contactors. That means the normally closed contact mechanically mirrors the main contactor's state — critical for safety circuits where you need positive indication that the power contacts have opened. That's a solid number for PLC input sensing. The leading and lagging contacts are both zero — meaning all contacts switch simultaneously, no overlap timing for sequenced signaling.
Terminals accept 2 x (0.5 to 2.5 mm²) solid or stranded, or 2 x (20 to 14 AWG). For finely stranded wire with ferrule, it's 2 x (0.5 to 1.5 mm²).
Substance prohibition date is 10/01/2009, which aligns with the original EU RoHS directive (2002/95/EC). The part is RoHS-compliant as shipped. No UL or CSA listing appears in the evidence, but the IEC 60947-4-1 mirror contact reference implies it is designed to that international standard. For a compliance pack, request the manufacturer's declaration from your sourcing contact.