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I want to switch a ballast with a relay. The target lamp is rated at 120 W, but the (electronic) ballast states a 55 A inrush current. Does this mean that as soon as the relay is closed, 55 A will be passing through the relay contact?

What kind of relay would I need for such a task and what ratings should it have? Is a normal 5 VDC relay rated at 250 VAC/10 A enough for this?

Here is the relay I want to use: Omron G5LE

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1 Answers1

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For an electronic ballast, the TV-x ratings are most applicable.

The G5LE falls just a hair short with a TV-3 rating (51A inrush maximum, 3A steady-state). G5LE-E has a TV-8 rating (117A inrush 8A steady-state) at 40°C.

Those ratings apply for both UL and CSA, note they apply to the N.O. contact only at up to 40°C only and you only get 25,000 operations life.

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More on ratings here

Spehro Pefhany
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