Features Applications Formerly a product Igniters for Xenon discharge lamps Fast switching rate Electronic igniters for gas heating and gas domestic appliances, e.g., cookers High energy, low loss capability Ignition of ultra-high pressure gas Wide operating temperature range discharge lamps for data and video Long service life projectors High insulation resistance RoHS compliant* Sparctube Switching Spark Gap ST-0470 Series Description Bourns Sparctube Switching Spark Gap Series is a range of switching spark gaps designed 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. Characteristics Initial Values: 1 Static Breakdown Voltage 800 V/s First Ignition Values ..............................................................................................................< 620 V Following Ignition Values ......................................................................................................470 V 12 % Electrical Life: 5 Minimum Number of Switching Cycles .......................................................................................2x10 Peak Current (Approx.)...............................................................................................................500 A Maximum Switching Frequency..................................................................................................200 Hz Breakdown Characteristics 620 V Limit First Ignition Values .............................................................................................................. 620 V Delay Time ............................................................................................................................< 60 ms Following Ignition Values ......................................................................................................470 V 15 % General Data: Breakdown Time .........................................................................................................................< 50 ns Insulation Resistance 100 Vdc ...............................................................................................> 100 megohms Share of Early Ignition Values (< 400 V) ....................................................................................< 1 % Capacitance................................................................................................................................< 1 pF 2 Operating Temperature Range ................................................................................................-40 C to +160 C Storage Temperature Range ......................................................................................................-65 C to +125 C Weight (Approx.) .........................................................................................................................2.3 g Testing ........................................................................................................................................100 % 3 Robustness of Terminations .......................................................................................................IEC 60068-2-21 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). Basic Application Circuit Sparctube Switching Spark Gap Device Tel: +886-2 2562-4117 R Email: asiacus bourns.com Europe: Tel: +36 88 520 390 Email: eurocus bourns.com The Americas: LOAD C Tel: +1-951 781-5500 Email: americus bourns.com www.bourns.com *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specications are subject to change without notice. Users should verify actual device performance in their specic applications. The products described herein and this document are subject to specic legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. *RoHS COMPLIANT Sparctube Switching Spark Gap ST-0470 Series Product Dimensions How to Order ST-0470-BLx ST - 0470 - B x x - STD 8.0 +0.1/-0.3 Series CERAMIC INSULATOR (.315 +.004/-.012) Designator DIA. METAL ELECTRODE Switching Voltage TINNED LEADS 0470 = 470 V Tolerance 1.0 B = 12 % (.039) Lead Shape 5.8 0.3 DIA. B = Bent Leads (.228 .012) C = No Leads* 60.0 - 82.0 L = Straight Leads (2.362 - 3.228) Packaging B = Bulk ST-0470-BCx T = Tape & Reel* Standard or Product Indicator 8.0 +0.1/-0.3 STD = Standard (.315 +.004/-.012) CERAMIC INSULATOR DIA. *Leadless version available in bulk packaging METAL ELECTRODE only. Typical Part Marking 5.8 0.3 ST 0470 wwy ...... wwy = Week and (.228 .012) year of production ST-0470-BBx Recommended Pad Layout 8.6 (.339) 9.6 MAX. 5.8 0.3 (.38) 8.0 +0.1/-0.3 (.228 .012) (.315 +.004/-.012) DIA. 8.4 8.6 (.331) (.34) 1.00 MAX. (.039) DIA. 4.5 2.52 0.20 0.25 +0.15/-0.05 0.20 (.18) (.099 .008) (.010 +.006/-.002) 8.4 (.008) APPROX. (.331) MAX. MM DIMENSIONS: (INCHES) Test Circuit RL Uo .........620 V R ...........See Note C ...........470 nF L ............0.5 H Uo C DUT Us DUT ......Device Under Test Us .........Breakdown Voltages NOTE: Uo and R are set to provide suitable conditions for different measurements. Specications are subject to change without notice. Users should verify actual device performance in their specic applications. The products described herein and this document are subject to specic legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.