This Square D AMP TWIN FUSIBLE PANELBOARD BRANCH SWITCH 600 VAC QMB361TW is a sensor/switch manufactured by Square D. It senses object presence, distance, or position (or switches an electrical circuit) and converts that into an output signal for machine control or monitoring. Key specifications noted on this listing include 600 VAC, 30 AMP. It is commonly in production lines requiring accurate detection or operator control.
