The L404 is an advanced LED-illuminated pushbutton from Leach International, developed for applications where reliability, visual feedback, and environmental resistance are crucial—for example, in aviation and defense. It is available in three versions: as an indicator, with momentary function, or with two stable positions. The product offers up to four display fields with different colors/engravings and several options for contacts, lenses, and sealing.

Features:
– Three versions: indicator, momentary function, or alternative function (two stable positions)
– Up to 4 display sectors with individual color and text
– 4PDT output contacts
– Engraving: classic, sunlight readable, or NVG compatible

Electrical characteristics:
– Up to 7 A at 115 VAC, 4 A at 28 VDC (resistive)
– Life: >50,000 electrical cycles
– Insulation resistance > 1000 MΩ at 500 VDC

Mechanical characteristics:
– Life: >100,000 mechanical cycles
– Operating force: 10 N (standard), 13.5 N (with seal)
– Mounting panel: up to 19 mm

Environmental resistance:
– Temperature: –55 °C to +85 °C
– Vibration: up to 15 g (10–2000 Hz)
– Shock: up to 75 g (6 ms)
– Moisture, dust, sand, salt according to MIL-PRF-22885G

Standard: MIL-S-22885, RTCA-DO-160E