The 1ZCS16LM12309 is an illuminated pushbutton switch cap designed for MEC Navimec modules, featuring black soft touch paint with laser-engraved legend marking. This cap is part of the 5G switch family and is compatible with both through-hole (TH9) and surface-mount (SH9) mounting options. The switch operates at 50 mA/24 VDC with single-pole momentary action, delivering 10,000,000 operations lifetime and IP67 sealing for reliable performance in harsh environments. The cap supports bicolour LED options including red/green, red/yellow, and green/yellow configurations, with operating temperature ranges of -40°C to +160°C for the switch body and -30°C to +85°C for the LED. This component is ideal for industrial control panels, medical devices, and instrumentation applications requiring durable, illuminated user interface elements with customizable legends.