Main Pole Number
2, 3 or 4. Labelled L1, L2, L3, L4 at the top, and T1, T2, T3, T4, at the bottom.
Auxiliary Contact Configuration
Separate to the main poles, these can be any combination in quantity of what's called 'Normally Open (NO)' and 'Normally Closed (NC)' contacts added to the front and/or side of the contactor.
Label Format: 2-digit number ending in 3 or 4 for Normally Open (NO), 2-digit number ending in 1 or 2 for Normally Closed (NC). Usually something like 13, 14 (for NO) or 21, 22 (for NC).
