The TeSys CV1BH1H1HM700J is a single-pole contactor from the TeSys B range, rated for 300 A operational current in AC-3 duty at 690 V AC. That AC-3 rating means it's sized for switching squirrel-cage motors — making and breaking the full load current during start and run. The AC-1 rating covers resistive loads like heating elements, where the switching arc is less severe. The auxiliary contact block includes one on-delay C/O contact and one NC pole. The on-delay gives you a timed signal for sequencing — useful for star-delta transitions or delayed start interlocks. The NC pole provides a normally-closed feedback path for the control logic.
Where it's used and how it integrates
This contactor is built for panel-mount applications — motor control centres, pump panels, conveyor starters. The single-pole format suits single-phase motor loads or DC switching where only one line needs breaking. The 300 A rating at 690 V AC means it handles high-current single-phase circuits without paralleling poles. Panel builders should account for the contactor's physical size and heat dissipation at full load; the TeSys B range uses a standard DIN-rail or screw-mount footprint.