Terminals (important)
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Typically 3 or 4 pins
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Common configurations:
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2-pin: simple ON/OFF (no lamp)
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3-pin: ON/OFF + indicator lamp (most likely this one)
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4-pin: DPST (switches live & neutral)
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For the illuminated type (3-pin):
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COM / Live input
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NO / Load output
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Neutral (for the lamp)
Common uses
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Power switch for:
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Air-cond accessories
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Water pumps
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Power supplies
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DIY control panels
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Indicator lights up when switch is ON
