High quality Swiss designed & manufactured panel switch from Eao, these were in common used in "bygone days" before everything went "touch"
EAO - Panel Illuminated Switch
Made in Switzerland
TYPE: 31-425 .036 T
Solder terminals for hard wiring
Lamp and Switch terminations are entirely independent of each other i.e 4 terminals
Normally open - momentary make when pushed
Maximum 48V @ 50mA switching current
Lamp was a maximum 48V 1.2W but I suspect the lamp fitted is much closer to 12V operation, see below
Supplied with the mounting nut, front Red diffused lens and the white internal plastic insert for text
This particular switch came from the talk-back control panel so it still has "MIC ON" on the insert - easy to "re-word"
Silent switch operation
In excess of 5 million switch operations lifetime
DIMENSIONS:
Front bezel: 24mm x 18mm
Body diameter: 15mm (this is the minimum hole diameter required in the panel)
Body length: 34.75mm
TESTING:
4 solder terminations on the rear of the body, 2 for the incandescent (yes, incandescent!) lamp and 2 for the momentary switch
Indicated on the body that the "standard" lamp fitted was 48V 1.2W, I have measured the cold resistance of the lamp current installed at 50 Ohms exactly. I then took at look at the lamp with just 6V DC, photograph shows that in fact it does illuminate quite well even at 6V. That photo is taken in my office at night, not a great photograph and it is hard to see the MIC ON label but in reality, easy to read when illuminated.
Switch operation is clean and silent, resulting in an extremely low resistance.
COSMETIC CONDITION:
USED
CLEAN
NO damage at all to the switch in all respects
