The Siemens 3RA2335-8XB30-1AK6 is a SIRIUS reversing contactor assembly — a pre-wired pair of contactors with mechanical interlock for reversing motor direction. The mechanical interlock prevents both contactors from closing simultaneously — a requirement for any reversing starter.
That figure governs the maintenance interval: expect the contactor pair to outlast most conveyor or pump applications before replacement. The -25 °C floor is the limit for cold-start applications like outdoor compressor houses; below that, pre-heat the enclosure.
Minimum clearance: 10 mm upwards, forwards, downwards, and sideways; 0 mm backwards — can sit flush against the back panel. For a field-service swap, verify the existing contactor orientation matches before torqueing the rail clips.
Because it ships with two 3RT2035-1AK60 contactors, the assembly is a drop-in replacement for any panel originally specified with those individual contactors plus a reversing interlock kit. No rewiring of the main power circuit is needed if the existing contactor footprint matches the S2 frame.