SIRIUS S0 power contactor for motor loads
It carries 3 NO main contacts rated for AC-3 duty at 11 kW on both 500 V and 690 V supplies, so it handles standard 400 V motors with headroom for higher-voltage installations.
The AC-3 motor-switching rating of 11 kW at both 500 V and 690 V means this contactor is sized for a typical 15 hp (11 kW) induction motor on a 400 V line, with enough margin to cover the same motor if the supply is 690 V. For resistive loads (AC-1), the contactor can handle up to the same 10 A continuous as its AC-12 auxiliary rating. Front-side protection is IP20, so finger-safe when installed, while the terminal area is IP00 (no protection), which is standard for panel-mount contactors where the enclosure provides the outer seal. The maximum operating altitude of 2 000 m matches standard low-voltage switchgear limits; above that, dielectric strength and air clearance derate apply.
For type 2 coordination (contactor remains usable after a fault), the fuse limit drops to 35 A gL/gG. These values matter when sizing upstream protection for a motor starter combination — the 35 A limit is the one to design around if you want to avoid replacing the contactor after a short circuit.
Main circuit terminals are screw-type, accepting 2x (1 to 2.5 mm²) stranded, 2x (2.5 to 6 mm²), or up to 2x 10 mm². AWG equivalents are 2x (16 to 12), 2x (14 to 10), or 1x 8. The auxiliary contact block uses 2x (0.25 to 2.5 mm²) solid or stranded.