MIL-PRF-22885/77E
TABLE IV. Electrical ratings - gold plated contacts.
28 V dc
28 V dc
Load
Sea level
50,000 feet
amperes
amperes
Resistive
1
1
Inductive
.5
.5
Low level life: Applicable to gold contact switches.
EMI/RFI shielding: Shielding efficiency test applicable, except the shielding attenuation shall be not
less than 47 dB at 100 MHz, 39 dB at 400 MHz and 33 dB at 1,000 MHz.
Luminance:
Display type W: See table V.
Display type S: Sunlight readability contrast requirements apply.
TABLE V Luminance for display type W.
Brightness 1/
Color
Color
(foot-lamberts,
code
minimum average)
Blue
B
8.0
Green
G
50.0
Red
R
30.0
White
W
180.0
Yellow
Y
300.0
1/ When illuminated by two MS25237-387 lamps of 0.30 ±0.02 mean
spherical candlepower at 28 volts dc, readings are for lens configuration
0. Luminance is without EMI screen. Brightness is reduced by
approximately 50% when EMI screen is specified.
Sunlight readability: Applicable to display type S switches, see table VII. Units shall be tested for
01 = 45° and 02 = 0° only. This procedure does not test readability under specularly reflective (glare)
condition. The average contrast ratio of each legend character to the background shall be 0.6 minimum
in the lighted legend condition. In the unlighted legend condition, the average contrast ratio of each
legend character to the background shall have an absolute value less than or equal to 0.1.
Qualification inspection: All part numbers will be approved for inclusion in the qualified products list
upon successful completion of testing specified in table VI. Table VI is based on use of qualified MIL-
PRF-8805/101 basic switches in the assembly.
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