characteristics sparctube ? switching spark gap st-0350 series initial values: static breakdown voltage @ 800 v/s 1 first ignition values .............................................................................................................. < 450 v following ignition values ...................................................................................................... 350 v 12 % electrical life: minimum number of switching cycles ....................................................................................... 2x10 5 peak current (approx.) ............................................................................................................... 500 a maximum switching frequency.................................................................................................. 200 hz breakdown characteristics @ 450 v limit first ignition values .............................................................................................................. 450 v delay time ............................................................................................................................ < 60 ms following ignition values ...................................................................................................... 350 v 15 % general data: breakdown time ......................................................................................................................... < 50 ns insulation resistance @100 vdc ............................................................................................... > 100 megohms share of early ignition values (< 298 v) .................................................................................... < 1 % capacitance ................................................................................................................................ < 1 pf operating temperature range 2 ................................................................................................ -40 c to +160 c storage temperature range ...................................................................................................... -65 c to +125 c weight (approx.) ......................................................................................................................... 2.3 g testing ........................................................................................................................................ 100 % robustness of terminations ....................................................................................................... iec 60068-2-21 3 notes: 1 at delivery aql 0.65 level ii, din iso 2859. 2 distribution of switchings: maximum 20 % above +125 c and 20 % below +20c. 3 test ua1 (tensile), ua2 (thrust), ub (bending) and uc (torsion). description bourns ? sparctube ? switching spark gap series is a range of switching spark gaps designed specifcally for voltage controlled switching of capacitive discharge circuits where a high energy, low loss, fast rate of switching is required. this series is ideally suited for applications where a capacitive discharge is utilized with a transformer to obtain pulses of very high voltage levels in the order of several thousand volts. features n formerly a product n fast switching rate n high energy, low loss capability n wide operating temperature range n long service life n high insulation resistance n rohs compliant* applications n igniters for architectural and automotive xenon discharge lamps n electronic igniters for gas heating and gas domestic appliances, e.g., cookers n ignition of ultra-high pressure gas discharge lamps for data and video projectors *rohs compliant lead free *rohs compliant versions available lead free versions are rohs compliant* *rohs directive 2002/95/ec jan. 27, 2003 including annex and rohs recast 2011/65/eu june 8, 2011. specifcations 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 specifc applications. basic application circuit load c r sparctube ? switching spark gap device asia-pacifc: tel: +886-2 2562-4117 email: asiacus@bourns.com europe: tel: +36 88 520 390 email: eurocus@bourns.com the americas: tel: +1-951 781-5500 email: americus@bourns.com www.bourns.com
60.0 - 82.0 (2.362 - 3.228) tinned leads metal electrode ceramic insulator 8.0 +0.1/-0.3 (.315 +.004/-.012) dia. 8.0 +0.1/-0.3 (.315 +.004/-.012) dia. 1.0 (.039) dia. 5.8 0.3 (.228 .012) 8.0 +0.1/-0.3 (.315 +.004/-.012) dia. metal electrode ceramic insulator 5.8 0.3 (.228 .012) 8.4 (.331) max. 8.6 (.339) max. 1.00 (.039) dia. 8.4 (.331) max. 5.8 0.3 (.228 .012) 2.52 0.20 (.099 .008) 0.25 +0.15/-0.05 (.010 +.006/-.002) 0.20 (.008) approx. 9.6 (.38) 8.6 (.34) 4.5 (.18) sparctube ? switching spark gap st-0350 series product dimensions st-0350-blx how to order st - 0350 - b x x - std series designator switching voltage 0350 = 350 v tolerance b = 12 % lead shape b = bent leads c = no leads* l = straight leads packaging b = bulk t = tape & reel* standard or modifed product indicator std = standard *leadless version available in bulk packaging only. test circuit typical part marking recommended pad layout st 0350 wwy ...... wwy = week and year of production c uo rl us dut uo ......... 450 v r ........... see note c ........... 470 nf l ............ 0.33 h dut ...... device under test us ......... breakdown voltages note: uo and r are set to provide suitable conditions for different measurements. dimensions: mm (inches) st-0350-bcx st-0350-bbx specifcations 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 specifc applications. 60.0 - 82.0 (2.362 - 3.228) tinned leads metal electrode ceramic insulator 8.0 +0.1/-0.3 (.315 +.004/-.012) dia. 8.0 +0.1/-0.3 (.315 +.004/-.012) dia. 1.0 (.039) dia. 5.8 0.3 (.228 .012) 8.0 +0.1/-0.3 (.315 +.004/-.012) dia. metal electrode ceramic insulator 5.8 0.3 (.228 .012) 8.4 (.331) max. 8.6 (.339) max. 1.00 (.039) dia. 8.4 (.331) max. 5.8 0.3 (.228 .012) 2.52 0.20 (.099 .008) 0.25 +0.15/-0.05 (.010 +.006/-.002) 0.20 (.008) approx. 9.6 (.38) 8.6 (.34) 4.5 (.18)
sparctube ? switching spark gap st-0350 series models st-0350-bbb, st-0350-blb and st-0350-bcb* ship standard bulk pack, 1,000 pcs./bag. the optional tape and reel packaging contains 1,000 pcs./reel for model st-0350-blt or 500 pcs./reel for model st-0350-bbt. * available in bulk packaging only. packaging specifcations 85.0 2.0 (3.346 .079) 356.0 2.0 (14.016 .079) dia. 14.0 +1.0/-0.0 (.551 +.039/-.00) dia. 6.2 1.0 (.244 .039) 90.0 2.0 (3.543 .079) 90.0 2.0 (3.543 .079) 10.0 1.0 (.394 .039) spacing 105.0 (4.134) a a b b c c section a-a section b-b section c-c 12.0 0.1 (.472 .004) 12.0 0.1 (.472 .004) 2.0 0.1 (.079 .004) 4.0 0.1 (.157 .004) 1.75 (.069) 0.50 0.05 (.020 .002) 8.5 +0.15/-0.05 (.335 +.006/-.002) 9.3 0.1 (.366 .004) 9.1 +0.2/-0.0 (.358 +.008/-.000) 7.50 (.295) 16.0 (.630) 8.2 +0.2/-0.0 (.323 +.008/-.000) 330 (12.992) 2.2 0.5 (.087 .020) 13.0 0.2 (.512 .008) 100 1.0 (3.937 .039) 16.5 0.1 (.650 .004) 20.2 1.0 (.795 .039) ??????? ?? ??? ?? st-0350-bbt st-0350-blt rev. 07/16 sparctube is a registered trademark of bourns, inc. in the u.s., the european community and peoples republic of china.
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