PL
IA
NT
Features
■
Formerly a
■
Fast switching rate
■
High energy, low loss capability
■
Wide operating temperature range
■
Long service life
■
High insulation resistance
■
RoHS compliant*
Applications
product
■
Igniters for architectural and automotive
CO
M
Xenon discharge lamps
■
Electronic igniters for gas heating and gas
domestic appliances, e.g., cookers
■
Ignition of ultra-high pressure gas
discharge lamps for data and video
projectors
*R
oH
S
ST-0350 Series Sparctube
™
Switching Spark Gap
Description
Bourns
®
Sparctube
™
Series is a range of switching spark gaps designed specifically 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:
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 +20°C.
3
Test Ua1 (tensile), Ua2 (thrust), Ub (bending) and Uc (torsion).
Basic Application Circuit
Sparctube
™
Switching Spark Gap
R
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
C
LOAD
*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.
Customers should verify actual device performance in their specific applications.
ST-0350 Series Sparctube
™
Switching Spark Gap
Packaging Specifications
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.
ST-0350-BLT
ST-0350-BBT
2.2 ± 0.5
(.087 ± .020)
16.5 ± 0.1
(.650 ± .004)
20.2 ± 1.0
(.795 ± .039)
100 ± 1.0
(3.937 ± .039)
14.0 +1.0/-0.0
(.551 +.039/-.00)
DIA.
90.0 ± 2.0
(3.543 ± .079)
356.0 ± 2.0
(14.016 ± .079)
DIA.
90.0 ± 2.0
(3.543 ± .079)
105.0
(4.134)
2.0 ± 0.1
(.079 ± .004)
10.0 ± 1.0
(.394 ± .039)
SPACING
13.0 ± 0.2
(.512 ± .008)
330
(12.992)
4.0 ± 0.1
(.157 ± .004)
12.0 ± 0.1
(.472 ± .004)
12.0 ± 0.1
(.472 ± .004)
1.75
(.069)
C B
7.50
(.295)
16.0
(.630)
6.2 ± 1.0
(.244 ± .039)
85.0 ± 2.0
(3.346 ± .079)
9.1 +0.2/-0.0
(.358 +.008/-.000)
A
C B
8.2 +0.2/-0.0
(.323 +.008/-.000)
0.50 ± 0.05
(.020 ± .002)
A
DIMENSIONS:
MM
(INCHES)
8.5 +0.15/-0.05
(.335 +.006/-.002)
9.3 ± 0.1
(.366 ± .004)
SECTION A-A
SECTION C-C
SECTION B-B
REV. 10/12
“Sparctube” is a registered trademark of Bourns, Inc. in the European Community, with pending trademark registration applications in the U.S. and China.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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