surge protection

View Details Square D SDSA4040 Surge Protect - 40kA, 480Y/277VAC, 3P4W, T4X  | Blackhawk Supply
$223.02 each
View Details Square D TVS4HWA10X SURGE PROTECTOR, 100KA, 277V  | Blackhawk Supply
$1,250.16 each
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