The 3RH2140-1BW40's contact ratings are given per voltage, not a single blanket figure. The DC switching curve follows the arc-quenching limits of the contact gap — at higher DC voltages the arc sustains longer, so the current must be derated.
The S00 footprint — 57.5 mm high, 45 mm wide, 73 mm deep — fits standard 45 mm-wide contactor slots in panel layouts.
Coil power and environmental limits
The DC magnet coil draws 4 W both for closing and holding — no inrush peak beyond the steady-state draw, which simplifies the control transformer sizing.
Compliance and substance restrictions
The 3RH2140-1BW40 carries a RoHS compliance date of October 1, 2009 — it meets the EU RoHS directive for substances of concern. The product extension for auxiliary switching is enabled, meaning the contactor accepts add-on auxiliary switch blocks for expanded contact count.