Iskra Zascite

SMH-TDRDATA/SIGNAL LINES PROTECTIONIEC category / EN type: C1/C2/C3 (IEC 61643-21)Design:Replaceable plug-in moduleNumber of protected pairs: 1 (2 lines)Coarse Protection:3 terminal GDTNom. Operating Voltage U n:110VDCMax. Operating Voltage U c:170VDCSeries Resistance: 9 - 11ΩFreq:< 16MHzSurge Discharge Ratings: I n: 10kA 8/20µs, I max: 20kA 8/20µsSeries load current:300mAEnclosure:DIN 43880 1TE, DIN rail mountTerminals:Multi-strand to 4 mm 2The SMH-TDR has been developed as a generic protector for use on data transmission circuits.Coarse protection is provided by a three terminal gas discharge tube.Internal thermal disconnectors are used to reduce the hazards of thermal runaway during fault conditions, or ifmains incursion onto the low voltage data circuit, occurs.To protect against the hazards of electric shock and fire which often results when power frequency contact occurrsbetween power and communication lines (often called mains incursion), a thermo-clip is included on the primaryprotection stage to divert the power frequency current to ground.If the module is unplugged out of the base, the connection lines remain enabled.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 time of overvoltage protection t AThermal protectionInsulation resistance of the protectionSerial resistance RTransverse capacitance CLimit frequency f GTerminal cross sectionOperating temperatureDegree of protectionHousing materialDimensions DIN 43880Mounting EN 60715Ordering code Base + Replaceable plug-in moduleReplaceable plug-in moduleSMH-TDR110VTwo parts: base + replaceable plug-in module1 (2 conductors)110V DC170V DC184V - 276V184V - 550V300mA10kA20kA< 500V< 100 nsThermo-clip≥ 1GΩ9 - 11Ω10 pF16 MHzMulti-strand to 4 mm 2-40oC … +80oCIP 20Thermoplastic; gray, extinguishing degree V-O2/3TEon a 35mm DIN rail708 150708 152Dimensional drawingsConnection diagram71,5GDTRTCR9012Legend:TCGDTRPGthermo-clipgas discharge tuberesistorprotective groundingPGaLINEa b b’ a’PGEQUIPb’a’www.iskrazascite.si29