3-pole contactors       Â
   6 to 630A (AC-3 category)         2.2 kW to 335 kW (AC3/400 V)    AC control    Embedded auxiliary contacts
4-pole contactors
   16 to 125A (AC1 category)    AC control
Benefits
   Designed to perform the essential motor starter and switching functions    Easy choice for simplicity and flexibility    Easy to install, easy to order, easy to understand
Applications 3-pole contactors: simple machines for:
   HVAC    Pumps    Telecom    GenSet    Textile    Packaging    Conveyer
4-pole contactors:
   Switching resistive loads    As contactors for Diesel Generator incomer    As incomer in a source changeover system requiring neutral isolation    Isolating power systems with unearthed or poorly earthed system    2 pole, AC-1 application (using 2 poles in parallel)    Changing the polarity of hoisting gear motors