Size S00 frame — 45 mm wide, 4 NO contacts
The 3RH7140-1AQ00 is a Size S00 contactor relay from the Siemens SIRUS line, meaning it occupies a 45 mm-wide DIN-rail footprint (72 mm deep, 57.5 mm tall) and carries four normally-open auxiliary contacts — the switching-element designation is 40 E. The front face carries an IP20 protection class — suitable for enclosed panel use where accidental finger contact is the only exposure; no washdown or outdoor rating.
Contact reliability is specified for PLC control at 17 V, 5 mA — the contacts are designed to switch dry logic-level signals without the oxide-film issues that plague standard power contacts at low voltage/current.
Coil data and insulation coordination
The AC magnet coil draws 27 VA apparent pick-up power and 5.4 VA holding power at a power factor of 0.8 (pick-up) and 0.27 (holding) — the holding power is roughly one-fifth the pick-up, so the coil runs cool after the armature seals. Operating frequency at DC-13 (solenoid load) is 1,000 operations per hour maximum — above that, the contact temperature rise limits the switching rate.