Auxiliary contact blocks for front mounting. 4-pole. For use with all 100-C contactors. Quick and easy mounting without tools. Electronic-compatible contacts down to 17 V, 5 mA. Mechanically linked performance between NO and NC poles and to the main contactor poles (except for L-types). Models with equal function with several terminal numbering choices. 1L is late break NC/early make NO. Bifurcated version for switching down to 5 V, 3 mA also available. Maximum number of auxiliary contacts that may be mounted in AC and 24 VDC electronic coil contactors, maximum 4NO contacts on the front of the contactor, 2NO contacts on the side, 4NC front or side, 6 total and DC coil contactors, maximum 4NO contacts on the front of the contactor or maximum 2NO contacts on the side, 4NC front or side, 4 total.