The HWA Series are surge suppressors and noise filters in a compact package. HWA surge protective devices are nipple mounted, parallel connected suppressors with different voltage configurations, including delta. TVS1HWA10X is single phase, three wire, 120/240VAC with an 100kA surge current. The surge suppressors use two pole spaces in a QO or Homeline load center, or NQ panelboard. The devices are NEMA 4X rated, allowing either indoor or outdoor installation. The devices comply with UL and CSA standards.