Siemens TPS3A03050 120/240 Type 1 Split Phase Surge Protective Device Lightning Arrester Replacement UL 1449 3rd Edition Listed, Type 1 Rated Surge Protective Device (SPD) having an In = 20 kA, formally known as TVSS Designed to connect and protect 120/240-Volt single or (split-phase) panels mounted either by chase nipple Per phase surge current = 50 kA having a corresponding 200 kA SCCR. Modes of protection are L-N and L-L UL 96A Lightning Protection Master Labeling compliant (at 20 kA) Standard Monitoring: LED Indicator: Dimensions: 3.25-Inch x 3.25-Inch x 3.3-Inch