The CITEL BM series surge protection devices feature a 3-electrode miniature gas discharge tube and are completely UIT-T K12 compliant. They also feature a 5 mm diameter, spark over voltages from 90 to 500 V, with 5 kA/10 chocs discharge current, and can be ordered in BMC short-circuit version, BMS version with termination, or BM-CMS version.