TISP4xxxM3LM Overvoltage Protector Series

TISP4xxxM3LM Overview
This TISP® device series protects central office, access and customer premise equipment against overvoltages on the telecom line. The TISP4xxxM3LM is available in a wide range of voltages and has a medium current capability. These protectors have been specified mindful of the following standards and recommendations: GR-1089-CORE, FCC Part 68, UL1950, EN 60950, IEC 60950, ITU-T K.20, K.21 and K.45. The TISP4350M3LM meets the FCC Part 68 “B” ringer voltage requirement and survives the Type B impulse tests. These devices are housed in a through-hole DO-92 package (TO-92 package with cropped center leg).

Description
These devices are designed to limit overvoltages on the telephone line. Overvoltages are normally caused by a.c. power system or lightning flash disturbances which are induced or conducted on to the telephone line. A single device provides 2-point protection and is typically used for the protection of 2-wire telecommunication equipment (e.g. between the Ring and Tip wires for telephones and modems). Combinations of devices can be used for multi-point protection (e.g. 3-point protection between Ring, Tip and Ground).