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I need some help for this consultant.<br />He has 120v 1 phase 1 hot, n & g.<br />Is the TVS230XR40S the correct unit?<br />The wiring diagram shows the correct diagram but calls it 230v.

The TVS230XR40S is NOT the correct unit. This unit is made for European single phase voltage, not US voltage. The clamping voltage for the 230V product is way to high to provide proper protection. At present Square D does not offer a 120V 2 wire + ground (Hot, Neutral + Ground) product except for our TVS120LC series. This product is a series product with a 20 amp limit. Its is not made to protect entire panels, just one dedicated load with an amperage draw less than 20 amps.

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