T PL IA N M CO *R oH S Features Applications ■ Size: 8 mm diameter, 10 mm length ■ Balanced and symmetrical TRIGARD® ■ Telecommunications electronics ■ Industrial electronics ■ Consumer electronics ■ ■ ■ ■ ■ design High surge current rating Stable breakdown throughout life Long life Fail-Short available RoHS compliant* 2028 Series Long Life Heavy-Duty 3-Electrode Gas Discharge Tube Characteristics Test Methods per ITU-T (CCITT) K.12 Class 3 and IEC 61643-311. Characteristic DC Sparkover ±20 % @ 100 V/s Impulse Sparkover 100 V/µs (Typical/99 %) 1000 V/µs (Typical/99 %) Model No. 2028-23 2028-25 2028-35 2028-42 250 V 350 V 420 V < 450 V/550 V < 650 V/750 V < 700 V/800 V < 850 V/950 V < 850 V/950 V < 1050 V/1150 V 230 V < 450 V/550 V < 650 V/750 V Impulse Transverse Delay ............................... 1000 V/µs..........................................................< 75 ns Insulation Resistance (IR) ............................... 100 V ................................................................> 1 GΩ Capacitance..................................................... 1 MHz ...............................................................< 2 pF Glow Voltage ................................................... 10 mA................................................................~ 70 V Arc Voltage ...................................................... 1 A .....................................................................~ 10 V DC Holdover Voltage 1 .................................... 135 V ................................................................< 150 ms Impulse Discharge Current 2 ........................... 30,000 A, 8/20 µs .............................................. 1 operation 20,000 A, 8/20 µs .............................................. 10 operations 5,000 A, 10/350 µs ............................................ 1 operation 200 A, 10/1000 µs ............................................. 300 operations 20 A, 10/1000 µs ............................................... 1500 operations Alternating Discharge Current ......................... 20 Arms, 1 second ............................................ 10 operations Operating Temperature............................................................................................................... -55 to +85 °C Climatic Category (IEC 60068-1)................................................................................................ 40 / 90 / 21 Notes: 1 Network applied. 2 The Rated Impulse Discharge Current for TRIGARD® Gas Discharge Tubes is the total current equally divided between each line to ground. • At delivery AQL 0.65 Level II, DIN ISO 2859. Bulk Packaging Specifications 2028-xx-ALF ................... 250 pcs. per tray 2028-xx-CLF ..................... 50 pcs. per tray 2028-xx-C2LF ................. 100 pcs. per tray 2028-xx-C2FLF............... 100 pcs. per tray How to Order 2028 - nn - x n F LF Model Number Designator Voltage (Divided by 10) 23 = 230 V 35 = 350 V 25 = 250 V 42 = 420 V Leads A = No Leads / Cassette Applications C = 1.0 mm Lead Shape (See Product Dimension Drawings) Fail-Short Option Blank = Standard Product F = With Fail-Short Mechanism RoHS Compliancy LF = RoHS Compliant Product Asia-Pacific: Tel: +886-2 2562-4117 Fax: +886-2 2562-4116 Europe: Tel: +41-41 768 5555 Fax: +41-41 768 5510 The Americas: Tel: +1-951 781-5500 Fax: +1-951 781-5700 www.bourns.com *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. 2028 Series Long Life Heavy-Duty 3-Electrode Gas Discharge Tube Product Dimensions 2028-xx-A 0.60 (.023) 2028-xx-C2 13.4 (.528) 10.0 ± 0.2 (.394 ± .008) 10.0 ± 0.3 (.394 ± .012) 7.4 ± 0.1 (.291 ± .004) 8.0 +0.2/-0.1 (.315 +.008/-.004) DIA. 8.0 ± 0.1 (.315 ± .004) 1.5 ± 0.2 (0.059 ± .008) 15.0 ± 0.5 (.591 ± .020) 1.0 (.039) DIA. 2028-xx-C 1.0 mm dia. lead wire 4.5 ± 1.5 (.177 ± .059) 4.4 ± 0.3 (.173 ± .001) 50.0 ± 0.3 (1.969 ± .012) 8.0 +0.2/-0.1 (.315 +.008/-.004) DIA. 10.0 ± 0.3 (.394 ± .012) 4.4 ± 0.3 (.173 ± .001) 2028-xx-C2F WITH FAIL-SHORT OPTION 13.4 (.528) 10.0 ± 0.3 (.394 ± .012) 1.0 DIA. (.039) 7.4 ± 0.1 (.291 ± .004) 8.0 +0.2/-0.1 (.315 +.008/-.004) DIA. 22.0 +0.5/-1.5 (.866 +.020/-.059) 16.5 +1/-0.7 (.650 +.039/-.028) 1.0 (.039) DIA. 4.4 ± 0.3 (.173 ± .001) 1.0 (.039) DIA. 4.4 ± 0.3 (.173 ± .001) DIMENSIONS: MM (INCHES) 4.4 ± 0.3 (.173 ± .001) 4.5 ± 1.5 (.177 ± .059) 4.4 ± 0.3 (.173 ± .001) REV. A 05/13 Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications.