Square D (Schneider Electric) ZBVG15 Push Button Switch. Schneider Electric Harmony™ Light Block Series: ZBV 22 mm Dia LED Lamp 110 to 120 VAC Spring Clamp Terminal Front Mount White. Additional Description: SQD -ZBVG15 (T) 110-120V AC/DC LED WHITE WITH SPRING CLAMP. Catalog Description: Schneider Electric110-120V AC/DC LED WHITE WITH SPRING CLAMP110...120 V AC 50/60 Hz22mmHarmony XB5-Harmony XB4Spring Terminalintegral LEDprotected LEDwhitelight blocklight block.