3-Element Surge Arrester Miniature Gas Tubes BM Recommended Pads for BM-CMS 7.5 5 4 BM 2.5 1 Note: All dimensions are in millimeters. The Citel BM Gas Discharge Tubes use non- radioactive technology and have been designed to protect Telecom and Datacom equipment against lightning surges and electrical transients. The BM-CMS version is SMD compatible. Non-radioactive UL approved Soldering characteristics comply with CEI 68-2-20 standards. ISO 9002 certified Electrical Specifications BM BM - 90 BM - 150 BM - 230 BM - 350 BM - 500 Note: Other DC sparkover voltages can be offered upon request. Part Number Description: Bare gas tube SMD version Part No: BM BM-CMS Soldering Methods The BM-CMS series is designed in compliance with SMD technology like Vapor Phase and Infrared Tunnel. The terminal coating is Sn-Pb with a Nickel barrier. Recommendations of Soldering: - The assembly should be pre-heated to about 100o C to minimize the thermal shock. - The typical solder temperature is 215o C (max. 260oC) and the exposure time at this temperature should not exceed 20 seconds. - Considering the dimensions of the gas tube, the wave soldering method is not recommended.