Siemens QSA2020SPD Whole House Surge Protection with Two 20-Amp Circuit Breakers for Use Only on Siemens Panels

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Provides whole house surge protection
Takes up the space of two standard single pole breakers, but also includes two single pole breakers.150 VAC, 40 mm metal oxide varistors
The SPD device protects the entire panel and all branch circuits from surges
Initial clamping level is 240 volts
Handy LED lights provide protection status notification


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