Iskra Zascite

SMH-SH SeriesDATA/SIGNAL LINES PROTECTIONIEC category / EN type: C1/C2/C3 (IEC 61643-21)Design: Replaceable plug-in moduleMode of protection:Longitudinal, TransverseCoarse Protection: 3 terminal GDTAvailable voltages: 5, 12, 15, 24, 30, 48, 60V DC, 110VACFrequency range:30MhzSurge Discharge Ratings: I n: 10kA 8/20µs, I max: 20kA 8/20µsSeries load current:1AEnclosure:DIN 43880 2/3TE, DIN rail mountTerminals:Multi-strand to 4 mm 2The SMH-SH series of low voltage protective devices has been developed to protect against the effects of inducedvoltages onto data, signal and communication circuits.The circuit topology consists of a multi-stage protector providing both common (longitudinal) mode and differential(transverse) mode protection.Coarse protection is provided by a three terminal gas discharge tube while fine protection is provided using a highspeed silicon avalanche diodes or metal oxide varistor stage. Care is taken to ensure coordination between thesetwo stages without voltage or surge current blind spots occurring.Thermal protection is provided to reduce the hazards of thermal runaway should there be an inadvertent mainsincursion fault. Both common (longitudinal) mode and differential (transverse) mode protection is provided.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 overvoltageRated operating current at 25oCNominal discharge current (8/20µs)Max. discharge current (8/20µs)Residual voltage at 5 kA (8/20µs)UnUc(SH-PG)(a-b), (a, b-PG)I LI nImax(line-line)5V DC6V DC184 - 276V7 - 10V1A10kA20kA< 22VResponse time of overvoltage protection t A (a, b), (a, b-PG)Response time of overvoltage protection t A (SH-PG)< 1ns100nsInsulation resistance of the protection (a-b), (a, b-PG) ≥ 6KΩ(SH-PG)Serial resistance R1.6 - 2.0ΩTransverse capacitance C(a, b), (a, b-PG)(SH-PG)Limit frequency f GTerminal cross sectionOperating temperatureDegree of protectionHousing materialDimensions DIN 43880Mounting EN 60715Ordering code Base + Replaceable plug-in moduleReplaceable plug-in module5V50pF5pF30Mhz708 201708 21112V12V DC15V DC184 - 276V16 - 21V1A10kA20kA< 42V< 1ns100ns≥ 15M Ω1.6 - 2.0Ω50pF5pF30Mhz708 202708 212SMH-SH15V 24V 30V 48Vtwo parts: base + replaceable plug-in module1 (2 conductors)15V DC18V DC184 - 276V20 - 24V1A10kA20kA< 48V< 1ns100ns≥ 18MΩ708 203708 21324V DC28V DC184 - 276V30 - 36V1A10kA20kA< 70V< 1ns100ns≥ 28MΩΩ1.6 - 2.0Ω50pF5pF30Mhz30V DC33V DC184 - 276V35 - 43V1A10kA20kA< 80V< 1ns100ns≥ 33MΩ> 1G / 100V1.6 - 2.0Ω50pF5pF30MhzOn a 35mm DIN rail708 204 708 205708 214 708 21548V DC52V DC184 - 276V55 - 68V1A10kA20kA< 140V< 1ns100ns≥ 52MΩ1.6 - 2.0Ω1.6 - 2.0Ω50pF50pF5pF5pF30Mhz30MhzMulti-strand to 4 mm2- 40oC ... + 80oCIP 20Thermoplastic; gray, extinguishing degree V-O2/3TE708 206708 21660V60V DC64V DC184 - 276V67 - 85V1A10kA20kA< 160V< 1ns100ns≥ 64MΩ1.6 - 2.0Ω50pF5pF30Mhz708 207708 217110 V110V DC170V DC184 - 276V184 - 264V1A10kA20kA< 450V< 25ns100ns≥ 170MΩ1.6 - 2.0Ω50pF5pF30Mhz708 208708 218Dimensional drawingConnection diagram71.5GDTR9012Legend:TCGDTRDBPGthermo-clipgas discharge tuberesistordiode blockprotective groundingTCDBRaa’bGDTb’(PG)LINEEQUIPc a b c dd’ c’ b’ a’c’(PG’)SHd d’SH’PGPGwww.iskrazascite.si13