3.2
Mean Time to Failure
The VIVISUN® Lighted Pushbutton Switch Mean Time to Failure for the 28 VDC or 5 VDC lighted pushbutton cap is in excess of 125,000 hours as calculated per MIL-HDBK-217F, Notice 2 for an AIF (Airborne Inhabited Fighter) environment at 60° C, and in excess of 250,000 hours for AIC (Aircraft Inhibited Cargo) at 40° C.
No Maintenance
The high reliability design enables the VIVISUN® Lighted Pushbutton Switch to operate virtually maintenance free for the life of the avionics platform.
Mechanical Life
100,000 cycles. Tested for 10,000 cycles at -40° C, 20,000 at +71° C and 70,000 cycles at +25° C.
Pushbutton Action
Momentary, Alternate or Indicator.
Operating Characteristics:
Actuation travel: 0.150” +/- 0.030”
Actuation force: 2 to 5 pounds.
A low tactile force (non MIL-PRF) option is also available (1.5 to 3 pounds).
Strength of Actuator
25 pounds static load.
Minimum Current for Luminance
The 28 VDC LED displays require approximately 1 milliamp of current per quadrant for Standard Square (3 mA for Large Rectangular) before producing a perceptible level of luminance so that the LEDs will not light inadvertently due to microamp currents. In emergency situations, 28 VDC Type S displays will produce a luminance in excess 50fL at 18 VDC.