Iskra Zascite

LZ-SMHDATA/SIGNAL LINES PROTECTIONIEC category / EN type: C1/C2/C3 (IEC 61643-21)Design: PCB assemblyMode of protection:Longitudinal, TransverseCoarse Protection: 3 terminal GDTAvailable voltages: 12, 24V DCFreq: 30MHzSurge Discharge Ratings: I n:10kA 8/20µs, I max: 20kA 8/20µsLoad current: 1ATerminal:Multi-strand to 1.5mm 2These efficient overvoltage barriers contain both coarse and fine protection stages and provide longitudinal and atransverse surge protection.The initial protection stage comprises a three-pole gas discharge tube and is designed to divert the primary surgeenergy. The subsequent fine protection stage is carried out using fast bi-directional silicon avalanche diodes. Careis taken in the design of this fine protection stage to avoid capacitive line loading and thereby ensuring a lowinsertion loss and wide operating frequency range.Series line impedances ensure energy co-ordination between the coarse and a fine protection stages at all levelsof the insident surge. To protect against the hazards of electric shock and fire which often results when powerfrequency contact occurrs between power and communication lines (often called mains incursion), a thermo-clipis included on the primary protection stage to divert the power frequency current to ground.Technical characteristicsTypeProtection constructionNumber of protected pairsNominal operating voltageMax. continuous operating voltageRated spark overvoltageUnUc(a/b-PG)(a-b)Rated operating current at 25oCI LNominal discharge current (8/20µs) I nMax. discharge current (8/20µs) ImaxResidual voltage at 5 kA (8/20µs)Response timet AThermal protectionInsulation resistance of the protection (a-b)Serial resistanceRTransverse capacitanceCLimit frequencyf GTerminal cross sectionOperating temperatureOrdering code12V12V DC15V DC17 - 21V17 - 21V1A10kA20kA< 48V< 1ns≥ 15MΩ1.6-1.8Ω50pF30MHzLZ-SMHPCB assembly1 (2 conductors)Thermo-clipMulti-strand to 1.5 mm 2- 40oC ... + 80oC24V24V DC28V DC31 - 37V31 - 37V1A10kA20kA< 70V< 1ns≥ 28MΩ1.6-1.8Ω50pF30MHz127 555 127 556Dimensional drawingsConnection diagram40.5GDTR2463320.5Legend:GDTRDBPGgas discharge tuberesistordiode blockprotective groundingINRPGDBOUT38www.iskrazascite.si