Gas Discharge Tube (GDT) Products SL1021A/B, SL1024A/B and PMT8 Series SL1021A/B, SL1024A/B and PMT8 Series Description GDT circuit protection devices dissipate electrical surge energy safely within a contained plasma gas. Commonly used to help protect sensitive telecom and networking equipment and lines, GDTs protect from damage that may result from lightning strikes and equipment switching operations. The Littelfuse GDT series described in this document are available in a variety of leaded and surface mount forms and offered with and without optional fail- safe clip. Please refer to the electrical specications, dimension and packaging options section of this document for additional information. Agency Approvals SL1021A/B and SL1024A/B Series: SL1021A/B and SL1024A/B series GDTs are designed AGENCY AGENCY FILE NUMBER to offer high levels of performance on fast rising transients in the range of 100V/S to 1KV/S, which E128662 are those most likely created by induced lightning disturbances. These devices feature ultra low capacitance (typically 3 Electrode GDT Graphical Symbol 1.5pF or less) and are extremely robust with SL102xA devices able to divert a 10,000 Amp pulse without destruction, and SL102xB sufx devices able to divert a b a = TIP a 20,000 Amp pulse without destruction. b = RING e = GROUND These series offer optimized internal geometry which (center electrode) provide low insertion loss at high frequencies, ideal for the protection of broadband and other high speed e transmission equipment. PMT8 Series: Features PMT8 GDT s are telecom grade devices designed to RoHS compliant 10KA (A sufx devices) / meet the recommendations in CCITT-K12 and Bellcore 20KA (B sufx devices) Low insertion loss GR-1361-CORE. The three electrode conguration surge capability tested is used in applications where simultaneous crowbar Excellent response to with 8/20s pulse as action of two signal lines is required. fast rising transients dened by IEC 61000-4-5 Ultra low capacitance Available with thermal Product Characteristics failsafe option (add F sufx to part number) Dull Tin Plate 17.5 12.5 Microns. Materials with ceramic insulator Applications LF mark, voltage& date code: Product Marking SL102xA - Red/White text SL1021 / SL1024: PMT8: SL102xB & PMT8 - Blue/White text Broadband equipment Telecom network Glow to arc ~ 1Amp interfaces transition current ADSL equipment Telephone line cards Glow Voltage ~60-200 Volts XDSL equipment Repeaters Satellite and CATV Storage and Operation -40 to +90C Temperature equipment Modems Splitters Line test equipment Transverse Voltage < 0.2Sec (Tested to ITU-T Rec. K.12) (Delay Time) General telecom Arc Voltage ~10 to 35 Volts equipment Holdover Voltage <150mS (Tested to ITU-T Rec. K.12) 2009 Littelfuse, Inc. 19 SL1021A/B, SL1024A/B and PMT8 Series Specications are subject to change without notice. Revised: November 10, 2009 Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specic applications.Gas Discharge Tube (GDT) Products SL1021A/B, SL1024A/B and PMT8 Series Electrical Characteristics Device Specications (at 25C) Life Ratings DC DC AC Surge Max Insulation DC Voltage Capaci- Max Single Surge Life Part Voltage Voltage Current Current Single Resistance 100V/Sec. tance Surge 10/1000 Number* 100 V/ 1kV/ 50Hz 8/20Sec Surge 1 1 ( 1Mhz) 10/350Sec Secx300 1 1 1 MIN TYP MAX MIN Sec. Sec. 1Sec.x10 x10 8/20Sec SL1021A090 SL1024A090 2 4kA SL1021B090 72 90 108 650 3 5kA SL1024B090 PMT 8 090 SL1021A145 SL1024A145 116 145 174 500 SL1021B145 SL1024B145 SL1021A150 600 SL1024A150 120 150 180 SL1021B150 SL1024B150 SL1021A200 150 200 250 SL1021A230 SL1024A230 SL1021B230 184 230 276 450 SL1024B230 PMT 8 230 650 SL1021A250 SL1024A250 SL1021B250 200 250 300 500 SL1024B250 PMT 8 250 SL1021A260 SL1024A260 210 260 310 550 700 SL1021B260 2 2 SL1024B260 10kA 15kA <1.5pF 10Amps 200Amps 3 3 20kA 25kA SL1021A300 SL1024A300 2 2.5kA 240 300 360 650 850 SL1021B300 3 5kA SL1024B300 SL1021A350 SL1024A350 SL1021B350 280 350 420 700 900 SL1024B350 PMT 8 350 SL1021A400 SL1024A400 SL1021B400 320 400 480 SL1024B400 PMT 8 400 850 950 SL1021A420 SL1024A420 345 420 500 SL1021B420 SL1024B420 SL1021A450 SL1024A450 360 450 540 900 1000 SL1021B450 SL1024B450 SL1021A500 SL1024A500 400 500 600 950 1100 SL1021B500 SL1024B500 SL1021A600 480 600 720 1000 1200 SL1024A600 NOTES: *Max capacitance is 1.5 pF, measured at 1 MHz. 1. Total current through centre electrode, tested in accordance with ITU-T Rec K.12 2. SL A series 3. SL B series & PMT 8 series 2009 Littelfuse, Inc. SL1021A/B, SL1024A/B and PMT8 Series 20 Specications are subject to change without notice. Revised: November 10, 2009 Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specic applications.