MIL-PRF-22885/104C
REQUIREMENTS:
Design and construction: See figures 1 through 4.
Intended use: These pushbuttons are used in conjunction with switch or indicator housings in accordance with
MIL-PRF-22885/103 or multistation housings in accordance with MIL-S-24317/12. They accept four T-1 midget
flange base lamps with .15 mean spherical candle power. They are intended for use in illuminated switch/
indicators under high ambient light conditions. Displays with contrast ratios of .6 or higher in lighted condition and
.1 or lower in unlighted condition (see table I) are considered readable under direct sunlight conditions.
Classification:
Enclosure design: 1 (Unsealed).
Temperature characteristic: 1(-55°C to +85°C).
Vibration grade: 3(10 - 2,000 Hz, 15 g peak).
Color: See table I.
Display type:
S (Sunlight readable).
H (Hidden legend).
Material
Pushbutton housing: Aluminum alloy, black anodize finish.
Display screen and lamp module: Thermoplastic.
Weight: .158 ounce (4.5 grams) ±10 percent including lamps.
Shock: Method I.
Dielectric withstanding voltage:
1,000 V rms sea level.
450 V rms 70,000 feet.
EMI/RFI shielding: Positive grounding and shielding efficiency test applicable when specified, see table II. See
MIL-PRF-22885/103 for minimum shielding attenuation.
Illuminated color: See table II.
Luminance: See table II (values are for reference only).
Sunlight readability: Applicable, except units are tested for φ1 = 45° and φ2 = 0° only. (This procedure does not test
readability in direct reflected specular sunlight.) See table II for required contrast ratio.
Part number: M22885/1-4- (dash number, see table II).
Qualification and periodic inspection: Required as a part of MIL-PRF-22885/103 or MIL-S-24317/12 switch
assemblies.
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