Schneider Electric ZBV-B3 Pushbutton Light Module

ZBV-B3 (also listed as ZBVB3) is a Harmony 22 mm pushbutton light module with a green integral LED designed to illuminate when used with Harmony XB4/XB5 22 mm pushbutton heads. It runs from 24 VAC or DC and uses screw-clamp terminals for straightforward wiring. Intended as a light block to accompany a 22 mm operator, it provides indicator illumination without a separate pilot lamp. In Schneider Electric catalogs for 24 V variants, the ZBVB3 is green, while white LED variants are cataloged as ZBVB1 for 24 V. This specific ZBV-B3 configuration was discontinued on January 9, 2023, and Schneider Electric indicates replacement with the ZBVB1 light block (white, 24 V AC/DC) for XB4/XB5 heads.