The 5SM3346-6KL: Snap-on DIN rail (REG) mount, 4 width units (72 mm wide). Depth is 77 mm, installation depth 70 mm — fits standard 8-module enclosures with room for gland plates. Terminal accepts solid or stranded copper from 1.5 to 25 mm²; torque to 2.5–3 N·m. IP20 with connected conductors in an installed distribution board — not for wet or outdoor locations without an enclosure.
Ambient temperature range -25 to +45 °C operating, -40 to +75 °C storage. Mechanical service life 10,000 switching cycles typical. The part is silicon-free, which matters for potting or conformal-coating compatibility in sealed enclosures. Compliance documentation (RoHS, REACH, IEC/EN 61008) is standard with the SENTRON series; the manufacturer provides declarations on request.