Allen-Bradley 100-C12Z10 USNT Industrial Relay

Allen-Bradley 100-C12Z10 USNT is a DIN-rail-mountable IEC contactor in the 100-C family, rated for up to 12 A of load current and used to switch AC power in motor starters and general-purpose control circuits. The unit provides a single normally open auxiliary contact (1 NO) and zero normally closed contacts, enabling basic status signaling or interlocking in control logic. Offered in a single-pack configuration, this component originates from Switzerland and sits in Rockwell Automation's 100-C/104-C line, designed for installation in compact control panels. A closely related variant, 100-C12ZD10, shares the same IEC 12 A rating and 1 NO auxiliary contact, and Rockwell lists that model as discontinued with a recommended replacement 100-E12KD10, reflecting the product line's evolution while preserving the core electro-mechanical characteristics.