ST 0350

PL
IA
N
T
Features
Applications
CO
M
■ Formerly a
product
*R
oH
S
■ Igniters for architectural and automotive
Xenon discharge lamps
■ Fast switching rate
■ High energy, low loss capability
■ Wide operating temperature range
■ Long service life
■ High insulation resistance
■ 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
■ RoHS compliant*
Sparctube™ Switching Spark Gap ST-0350 Series
Description
Bourns® Sparctube™ Switching Spark Gap 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 .......................................................................................2x105
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 Device
R
C
LOAD
Asia-Pacific:
Tel: +886-2 2562-4117
Fax: +886-2 2562-4116
EMEA:
Tel: +36 88 520 390
Fax: +36 88 520 211
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.
Sparctube™ Switching Spark Gap ST-0350 Series
Product Dimensions
How to Order
ST - 0350 - B x x - STD
ST-0350-BLx
8.0 +0.1/-0.3
(.315 +.004/-.012)
DIA.
CERAMIC INSULATOR
METAL ELECTRODE
Series
Designator
Switching Voltage
0350 = 350 V
TINNED LEADS
Tolerance
B = 12 %
1.0
(.039)
DIA.
5.8 ± 0.3
(.228 ± .012)
Lead Shape
B = Bent Leads
C = No Leads*
L = Straight Leads
60.0 - 82.0
(2.362 - 3.228)
Packaging
B = Bulk
T = Tape & Reel*
ST-0350-BCx
8.0 +0.1/-0.3
(.315 +.004/-.012)
DIA.
CERAMIC INSULATOR
Standard or Modified Product Indicator
STD = Standard
*Leadless version available in bulk packaging
only.
METAL ELECTRODE
Typical Part Marking
5.8 ± 0.3
(.228 ± .012)
ST 0350 wwy ...... “wwy” = Week and
year of production
ST-0350-BBx
5.8 ± 0.3
(.228 ± .012)
8.6
(.339)
MAX.
Recommended Pad Layout
8.0 +0.1/-0.3
(.315 +.004/-.012)
DIA.
9.6
(.38)
8.4
(.331)
MAX.
1.00
(.039)
DIA.
8.6
(.34)
2.52 ± 0.20
(.099 ± .008)
0.25 +0.15/-0.05
(.010 +.006/-.002)
0.20
(.008)
APPROX.
DIMENSIONS:
8.4
(.331)
MAX.
4.5
(.18)
MM
(INCHES)
Test Circuit
R
Uo
L
C
DUT
Us
Uo .........450 V
R ...........See Note
C ...........470 nF
L............0.33 µH
DUT ......Device Under Test
Us .........Breakdown Voltages
NOTE: Uo and R are set to provide suitable conditions for
different measurements.
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.
Sparctube™ Switching Spark Gap ST-0350 Series
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)
14.0 +1.0/-0.0
(.551 +.039/-.00)
DIA.
100 ± 1.0
(3.937 ± .039)
90.0 ± 2.0
(3.543 ± .079)
13.0 ± 0.2
(.512 ± .008)
90.0 ± 2.0
(3.543 ± .079)
356.0 ± 2.0
(14.016 ± .079)
DIA.
330
(12.992)
105.0
(4.134)
4.0 ± 0.1
(.157 ± .004)
2.0 ± 0.1
(.079 ± .004)
12.0 ± 0.1
(.472 ± .004)
12.0 ± 0.1
(.472 ± .004)
1.75
(.069)
C B
10.0 ± 1.0
(.394 ± .039)
SPACING
7.50
(.295)
6.2 ± 1.0
(.244 ± .039)
A
85.0 ± 2.0
(3.346 ± .079)
A
C B
9.1 +0.2/-0.0
(.358 +.008/-.000)
DIMENSIONS:
16.0
(.630)
8.2 +0.2/-0.0
(.323 +.008/-.000)
0.50 ± 0.05
(.020 ± .002)
MM
(INCHES)
SECTION C-C
SECTION B-B
8.5 +0.15/-0.05
(.335 +.006/-.002)
9.3 ± 0.1
(.366 ± .004)
REV. 01/16
“Sparctube” is a registered trademark of Bourns, Inc. in China and the European Community, with a trademark registration application pending in the U.S.
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.
SECTION A-A