338 www.littelfuse.com gas discharge tubes ordering information 1021 b sl voltage pin configuration failsafe optio f=plastic s=solder n c=core r=leaded greentube sl1021b series gas plasma arresters 3 electrode gdt a=tip b=ring e=ground (centre electrode) graphical symbol a b e high performance beta range ?8.0+ _0.2 9.5 max ?1.0+ _0.2 all dimensions in mm the sl1021b series offers high levels of performance on fast ris- ing transients in the domain of 100v/ s to 1kv/ s, which are those most likely from induced lightning disturbances. the sl1021b series also features ultra low capacitance (typically 1pf or less) and optimised internal geometry which provides low insertion loss at high frequencies, so are ideal for the protection of broadband equipment. these devices are extremely robust and are able to divert a 20,000amp pulse without destruction. features ? rohs compliant except ?s?suffix ? low insertion loss ? excellent response to fast rising transients. ? ultra low capacitance. ? 10ka surge capability tested with 8/20 s pulse as defined by iec 6100-4-5 ? 20,000 a single shot surge capability tested with 8/20 s pulse as defined by iec 6100-4-5 ? available with thermal failsafe option (add ??or ??suffix to part number) applications: ? broadband equipment. ? adsl equipment. ? xdsl equipment. ? satellite and catv equipment. ? general telecom equipment. mechanical specifications: weight: 0.63g (0.022 oz.) materials: electrode base: nickel iron alloy electrode plating: bright sn body: ceramic device marking: littelfuse ?f?marking, voltage and date code. blue. pb rohs sl1021a xxxc sl1021b xxxr sl1021b xxxrf sl1021b xxxrs
339 www.littelfuse.com 8 gas discharge tubes gas discharge tubes high performance beta range greentube sl1021b series gas plasma arresters littelfuse 3 terminal heavy duty arrester series totally non-radioactive, ul recognized (1) total current through center (ground) electrode, both line electrodes pulsed simultaneously; half value through respective line terminal to ground. (2) 100 amps, 10/1000 s pulse (3) 10 shots, a.c. 60 hz, 1sec. duration. (4) 10 shots, 8/20 s waveform (5) either end (line) electrode to centre (ground) electrode (6) applies to ??option devices mounted in a suitable connector with high pressure contacts. part number sl1021b145 sl1021b150 sl1021b200 sl1021b230 sl1021b250 sl1021b260 sl1021b300 sl1021b350 sl1021b400 sl1021b420 sl1021b450 sl1021b500 dc voltage @ 100v/sec (v) 145 150 200 230 250 260 350 350 400 420 450 500 dc breakover voltage min-max (v) 116-174 120-180 150-250 184-276 200-300 210-310 240-360 280-420 320-480 345-500 360-540 400-500 max dynamic breakover voltage @ 100v/ s 500 500 350 350 400 420 450 500 550 600 650 750 max alternating discharge current 1,3,6 (a) 20 20 20 20 20 20 20 20 20 20 20 20 max repetitive impulse discharge current (ka) 10 10 10 10 10 10 10 10 10 10 10 10 max alternating discharge current 5 (a) 10 10 10 10 10 10 10 10 10 10 10 10 max impulse discharge current (ka) 20 20 20 20 20 20 20 20 20 20 20 20 life test rating 2 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots max single impulse discharge current 10/350? 5,6 (ka) 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 voltage (v) time (ns) 0 200 400 600 800 1000 1200 max dynamic breakover voltage hold-over voltage on-state voltage voltage vs time characteristic 50 45 40 35 30 25 20 15 10 5 0 0 1 2 3 4 5 6 current (a) time (s) 1 line to ground both lines to ground time vs. current for failsafe pb rohs
340 www.littelfuse.com gas discharge tubes 0 0 25 50 75 100 125 150 175 200 225 250 50 100 150 200 250 300 350 400 450 500 time in seconds temperature ?c profile for reflow soldering solder t 1 max = 266 o c flow area t 1 = 239 o c 200 300 tm = 179 o c forced cooling preheating area 100 10 20 30 40 time (seconds) temperature (?c) profile for wave soldering notes: t 1 max = maximum tab tem p erature = 266 o c t 1 = flow tem p earture of solder = 239 o c tm = meltin g point of solder = 179 o c tamb = 25 o c maximum p ermissible rate of tem p erature chan g e = 7 o c / sec high performance beta range greentube sl1021b series gas plasma arresters pb rohs
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