Switching Spark Gap
UN2K8 Series
Description
The 2K8 series is a two-terminal, bi-directional, voltage triggered
switch, specifically for ignition circuits used in high pressure HID
lighting. The gas plasma trigger technology offers very fast switch
speeds with improved di/dt values compared to similar function
UN2K8-XXXSMD
silicon based devices.
Switching voltages are
fixed
depending on
UN2K8-XXXL
UN2K8-XXX
the part number selected.
Schematic Symbol
Agency Approvals
Features
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Non-Radioactive
RoHS Compliant
Fast breakdown-time
Very high switch speed when switch voltage achieved, High
di/dt allows for optimum performance of ignition transformers.
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Long service life
Materials
Product Characteristics
Leaded Device:
Nickel-plated with
Tinplated wires
Without wire and Surface Mount:
Dull Tin-plated
UNION XXXK
Product Marking
Max Load Current
XXX
K
50mA
≤50mS
>1GΩ
1.5pF
-40 to +90°C
-20 to +125°C
UN2K8-XXXL
Weight
UN2K8-XXX
UN2K8-XXXSMD
~1.5g
~1.35g
~1.5g
-Nominal voltage
- Switch Spark Gap
Applications
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HID Xenon discharge lamps ignite
Gas stoves
Detonating devices(EBW)
Transient Power
Other electronic ignition circuit
Breakdown Time
Insulation Resistance
at DC100 V
Capacitance
Storage Temperature
Operational
Temperature
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
1/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
Switching Spark Gap
UN2K8 Series
Dimensions
Unit: mm
Surface Mount Devices (UN2K8-XXXSMD)
Axial Leaded Devices (UN2K8-XXXL)
Without wire Devices (UN2K8-XXX)
Recommended pad outline
Electrical Specifications
UN2K8-230L
UN2K8-230
UN2K8-230SMD
Part Number
Nominal breakdown voltage
Initial values
2)
Static breakdown voltage
1)
First ignition value after 24
hours in darkness
Following ignition values
Electrical life
3)
Breakdown voltage
After life test first ignition value
after 24 hours in darkness
Following ignition values
Switching operations
Life test Circuit
Open Circuit Voltage
Loading Resistance
Discharge Capacitance
Inductance
Discharge Peak Current
Maximum switching frequency
UN2K8-300L
UN2K8-300
UN2K8-300SMD
UN2K8-350L-1
UN2K8-350-1
320V
UN2K8-350L
UN2K8-350
350V
UN2K8-350L-2
UN2K8-350-2
370V
UN2K8-400L
UN2K8-400
400V
UN2K8-350SMD-1 UN2K8-350SMD
UN2K8-350SMD-2 UN2K8-400SMD
230V
300V
≤260V
195~240V
≤340V
260~310V
≤360V
275~330V
≤400V
300~365V
≤420V
325~385V
≤450V
340~420V
≤270V
195~265V
200000 Ignitions
≤360V
260~330V
200000 Ignitions
≤380V
275~350V
200000 Ignitions
≤430V
300~385V
200000 Ignitions
≤450V
325~405V
200000 Ignitions
≤480V
340~440V
200000 Ignitions
V
0
R
C
L
I
P
230V
AC
15KΩ
2.2μF
10μH
~300A
100Hz
350V
10KΩ
680nF
0.5μH
~500A
100Hz
400V
10KΩ
680nF
0.5μH
~500A
100Hz
450V
10KΩ
680nF
0.5μH
~500A
100Hz
450V
10KΩ
680nF
0.5μH
~500A
100Hz
500V
10KΩ
680nF
0.5μH
~500A
100Hz
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
2/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
Switching Spark Gap
UN2K8 Series
Electrical Specifications (Continue)
UN2K8-450L
UN2K8-450
UN2K8-450SMD
Part Number
Nominal breakdown voltage
Initial values
2)
Static breakdown voltage
1)
First ignition value after 24
hours in darkness
Following ignition values
Electrical life
3)
Breakdown voltage
After life test first ignition value
after 24 hours in darkness
Following ignition values
Switching operations
Life test Circuit
Open Circuit Voltage
Loading Resistance
Discharge Capacitance
Inductance
Discharge Peak Current
Maximum switching frequency
1). At delivery AQL 0,65 level II, DIN ISO 2859
2). Fig. 1
3). Fig. 2
UN2K8-500L
UN2K8-500
UN2K8-500SMD
UN2K8-600L-1
UN2K8-600-1
550V
UN2K8-600L
UN2K8-600
600V
UN2K8-800L-1
UN2K8-800-1
730V
UN2K8-800L
UN2K8-800
800V
UN2K8-600SMD-1 UN2K8-600SMD
UN2K8-800SMD-1 UN2K8-800SMD
450V
500V
≤510V
400~475V
≤570V
450~530V
≤620V
500~585V
≤720V
550~640V
≤850V
640~810V
≤920V
705~860V
≤540V
400~495V
200000 Ignitions
≤600V
450~560V
200000 Ignitions
≤650V
500~620V
200000 Ignitions
≤750V
550~680V
200000 Ignitions
≤900V
640~840V
200000 Ignitions
≤950V
705~900V
200000 Ignitions
V
0
R
C
L
I
P
550V
10KΩ
680nF
0.5μH
~500A
100Hz
600V
13KΩ
470nF
0.1μH
Max.1000A
200Hz
650V
13KΩ
470nF
0.1μH
Max.1000A
200Hz
750V
13KΩ
470nF
0.1μH
Max.1000A
200Hz
900V
68KΩ
100nF
0.4μH
~650A
200Hz
1000V
68KΩ
100nF
0.4μH
~650A
200Hz
Test Circuit
Fig. 1: Breakdown Voltage Test Circuit
Fig. 2: Electrical Life Test Circuits
R
51K
P.V.D.
L
V
0
DUT
V
C
DUT
V
DC
V
0.22μF
V
DC
Voltage=1000V
Discharge current 10 ~20 mA
P.V.D. Peak Voltage Detection
DUT Device Under Test
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
3/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
Switching Spark Gap
UN2K8 Series
Recommended soldering profile
Wave soldering
Reflow soldering
Soldering profile applied a single process
Soldering Parameters - Hand Soldering
Solder Iron Temperature: 350°C +/-5°C
Heating Time: 5 seconds max.
Part Numbering
UN2K8
–
XXX L
No,
L,
SMD,
without wire
with axial wire
Surface Mount
Nominal breakdown voltage
230 = 230V
300 = 300V
350 = 350V
400 = 400V
Series
500=500V
600=600V
800=800V
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
4/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
Switching Spark Gap
UN2K8 Series
Packaging Information
Part Number
UN2K8-XXXL
UN2K8-XXX
UN2K8-XXXSMD
Tape & Reel -16mm tape/13″Reel
Unit: mm
Description
100PCS per Tray, 10 Trays / Inner Carton
100PCS per Tray, 10 Trays / Inner Carton
100PCS per Tray, 10 Trays / Inner Carton
Quantity
1000
1000
1000
500
Tray used in UN2K8-XXXL
Tray used in UN2K8-XXX / UN2K8-XXXSMD
Tape
Used in UN2K8-XXXSMD
Reel
Cautions and warnings
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Switching spark gaps may be used only within their specified values.
Damaged switching spark gaps must not be re-used.
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
5/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
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