SL1021A500R - 

Littelfuse SL1021A Series Gas diskharge Tube
Littelfuse SL1021A series GDT plasma arresters offer high levels of performance on fast rising transients such as those induced from lightning disturbances. The Littelfuse SL1021A series also features unltra low capacitance and optimized internal geometry, ensuring low insertion loss at high frequencies. Additionally, the SL1021A series is robust enough to withstand a 10000A pulse without destruction. Applications include broadband equipment, ADSL equipment, XDSL equipment, satellite and CATV equipment as well as general telecom equipment.