Switch Question

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sub_zero_ac

Member - Posts: 2

Joined: January 26, 2004

Location: Canada

Posted: May 09, 2004 at 2:26 AM / IP Logged

If a toggle switch is rated at 3amps at 120volts, and used in a 12volt situation, will it have a higher amp limit, lover or will remain unchanged? Thanks.

Teken

Gold - Posts: 1,492

Joined: August 04, 2002

Location: Aruba

Posted: May 10, 2004 at 4:12 PM / IP Logged

Short answer: The current rating remains the same in the switch.

That is a pretty loaded question. Technically speaking the switches internal contacts are made with a specific diameter / surface area of metal to sustain a certain amount of current.

Regardless of the supply AC / DC, 3 amps is 3 amps. This does not address other AC factors such as inductance, reactance, etc.

Remember, all switches have a built in buffer of 20% to sustain peak current demands. The 3 amp rating is RMS or continous duty, with out contact arching.

Regards

EVIL Teken . . .

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Switch Question

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