PMT3(310)25001

Gas Discharge Tube (GDT) Products PMT3(310) Series RoHS PMT3(310) Series Description Littelfuse three electrode PMT3(310) series GDTs are designed primarily to protect telecommunications equipment requiring simultaneous crowbar action of two signal lines. GDTs function as switches; dissipating a minimum amount of energy and can handle much higher currents than other types of transient voltage protection. Features Rugged ceramic-met al Available with or construction without leads Agency Approvals Low capacit ance (<1.5 Available with various pF) lead spacings AGENCY AGENCY FILE NUMBER Available with or Tested to REA PE-80 E128662 without fail-safe clip Applications 3 Electrode GDT Graphical Symbol Telephone interface Modems Telephone line cards Line test equipment a = TIP a b b = RING Repeaters e = GROUND (center electrode) e Electrical Characteristics Device Specifications Life Ratings Max Max Surge DC Breakdown DC DC AC AC Surge Insulation Capaci- Single Single Life (I-g) Part Number Volt age Volt age Current Current Current Resistance tance Surge Surge 10/1000 @50 0V/s 100 V/ 1kV/ 11 cycles @ 50Hz 1Sec. 8/20Sec (@1Mhz) 8/20 10/350 Sec 1 1 1 Sec. Sec. 50-60Hz x10 x10 1 1 1 Sec Sec x 40 0 Min Typ Max Min PMT3(310)075 60 75 90 50 0 650 10 10 (at 50V) PMT3(310)090 72 90 108 50 0 650 PMT3(310)150 120 150 180 50 0 60 0 1.5 pf 130Amps 20Amps 20kA 25kA 5kA 1kA PMT3(310)230 184 230 276 60 0 700 10 PMT3(310)250 20 0 250 300 60 0 700 10 (at 100V) PMT3(310)350 280 350 420 900 1000 PMT3(310)40 0 320 40 0 480 900 1000 PMT3(310)50 0 40 0 50 0 60 0 1100 1200 NOTES: 1. Tot al current through center electrode, tested in accordance with ITU-T Rec K.12 and REA PE 80 End of life DC: 50% of minimum initial DC breakdown volt age to 150% of maximum initial DC breakdown volt age limit. Impulse: less than 150% of initial impulse breakdown down limit. 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/13/15Gas Discharge Tube (GDT) Products PMT3(310) Series Product Characteristics Storage and Operational Dull Tin Plate 17.5 12.5 Microns -40 to +90C Materials Temperature with Ceramic Insulator Transverse Voltage (Delay Time) Littelfuse LF marking , Volt age and < 0.2Sec Product Marking Tested to ITU-T Rec. K.12 date code. Arc Voltage ~ 10 to 35 Volts Glow to arc ~ 1Amp transition current Holdover Voltage < 150mS Glow Voltage ~ 60-20 0 Volts Tested to ITU-T Rec. K.12 & REA PE 80 Soldering Parameters - Reflow Soldering (Surface Mount Devices) t Reflow Condition Pb Free assembly P T P Critical Zone Ramp-up TL to TP - Temperature Min (T ) 150C s(min) T L Pre Heat - Temperature Max (T ) 20 0C t s(max) L T S(max) - Time (Min to Max) (t ) 60 180 secs s Ramp-down Average ramp up rate (Liquidus Temp Preheat 3C/second max (T ) to peak T S(min) L t S T to T - Ramp-up Rate 5C/second max S(max) L - Temperature (T ) (Liquidus) 217C L 25 Reflow time to peak temperature - Temperature (t ) 60 150 seconds Time L (t 25C to peak) +0/-5 Peak Temperature (T ) 260 C P Time within 5C of actual peak 10 30 seconds Soldering Parameters - Hand Soldering Temperature (t ) p Ramp-down Rate 6C/second max Solder Iron Temperature: 350 C +/- 5C Time 25C to peak Temperature (T ) 8 minutes Max. P Heating Time: 5 seconds max. Do not exceed 260C Soldering Parameters - Wave Soldering (Thru-Hole Devices) 300 Recommended Process Parameters: 280 Wave Parameter Lead-Free Recommendation 260 240 Preheat: 220 (Depends on Flux Activation Temperature) (Typical Industr y Recommendation) 200 Temperature Minimum: 100 C 180 160 Temperature Maximum: 150 C 140 Preheat Time: 60-180 seconds 120 100 Solder Pot Temperature: 280 C Maximum 80 Solder Dwell Time: 2-5 seconds 60 40 20 0 Note: Surge Arrestors with a Failsafe mechanism should be Time (Seconds) individually examined after soldering Preheat Time Cooling Time Dwell Time 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/13/15 Temperature (C) - Measured on bottom side of board 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 Temperature