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jrevens(at)comcast.net
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 Posted: Fri Oct 18, 2013 1:13 pm Post subject: Switch question |
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I purchased some very nice DC-rated Mil-spec Honeywell switches (#MS24523-23) to use as ignition switches with my Rotax powered Kitfox. In checking the spec sheet after the fact, I see that they have “silver cadmium oxide” contacts. Then there is a statement that “non-arcing loads (generally less than 12v & 0.5 amps) are not recommended” with silver cadmium oxide contacts. Can anyone tell me if using these style switches with the silver cadmium oxide points, for ignition (or master switches with the DPDT version), would be acceptable & prudent?
[b] John Evens [/b]
[quote][b]
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nuckolls.bob(at)aeroelect
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| Posted: Fri Oct 18, 2013 3:47 pm Post subject: Switch question |
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At 04:12 PM 10/18/2013, you wrote:
| Quote: | I purchased some very nice DC-rated Mil-spec Honeywell switches (#MS24523-23) to use as ignition switches with my Rotax powered Kitfox. In checking the spec sheet after the fact, I see that they have “silver cadmium oxide” contacts. Then there is a statement that “non-arcing loads (generally less than 12v & 0.5 amps) are not recommended” with silver cadmium oxide contacts. Can anyone tell me if using these style switches with the silver cadmium oxide points, for ignition (or master switches with the DPDT version), would be acceptable & prudent?
John Evens |
Yes, I don't understand that admonition in
in the spec sheet. Did you find that on the
'net? Very few applications for toggle switches
are free of arcing. The degree by which arcing
is generated can be all over the map but in your
airplane, the worst case loads that might exist . . .
paired with the exceedingly low duty cycle for
switches in light aircraft do not pose any
threat of premature failure due to overloading.
Can you sent me a copy of the spec sheet or
a link for downloading it?
Bob . . . [quote][b]
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