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SR270K10D Datasheet(PDF) 3 Page - WALSIN TECHNOLOGY CORPORATION

Part No. SR270K10D
Description  High performance transient voltage suppression
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Maker  WALSIN [WALSIN TECHNOLOGY CORPORATION]
Homepage  http://www.passivecomponent.com/
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SR270K10D Datasheet(HTML) 3 Page - WALSIN TECHNOLOGY CORPORATION

 
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Pulse Duration, Microseconds
100%
10%
1%
0.1%
0.01%
Number of Pulses on Order from 100%
Respectively:
1 Pulse
10 Pulses
102 Pulses
103 Pulses
104 Pulses
105 Pulses
106 Pulses
Metal Oxide Varistor (MOV)
■ Characteristics
High performance transient voltage suppression
Short response time to surge voltage
Low standby power dissipation
Excellent clamping characteristics
High performance withstanding surge currents
High reliability
UL, CSA, VDE and SEV recognized
■ Applications
Surge protection in:
consumer electronics
industrial electronics
communication electronics
measuring and controlling systems
electronic home appliances
Protection against surges induced by lighting striking incoming
power lines.
Suppression of surges caused by switching inductive loads such
as transformers, relays and coils.
Protection of rectification diodes, SCRs, power transistors,
semiconductor devices, etc.
■ Definition of Varistor Terms
Rated RMS Voltage, Rated DC Voltage:
The maximum designated values of power system voltage that
may be applied continuously between the terminals of a device.
Varistor Voltage:
Test characteristic that is used to classify varistors by type.
A test current of 1mA DC is typically used to determine varistor
voltage classification type. Varistor voltage clamping
characteristics can be defined at various test levels.
Rated Peak Single Pulse Transient Current:
Maximum surge current
, 8/20μs waveform which a varistor is
rated to withstand for a single surge.
Rated Single Pulse Transient Energy:
Maximum allowable energy for a single impulse (see specified
waveforms).
Maximum Clamping Voltage:
Measured peak voltage across the device terminals when a
current impulse of specified amplitude and waveform is conducted
through the varistor.
Typical Capacitance:
Typical capacitance values are measured at a test frequency of
1kHz. Capacitance values are only for reference purpose only, not
subject to outgoing inspection.
■ General Characteristics
Storage Temperature: -40℃ to +125℃
Operating Ambient Temperature: -40℃ to +85℃(without derating)
Maximum Voltage-Temperature Coefficient:<-0.05﹪
∕℃
Insulation Resistance: 1000 Mega-ohm minimum
Hi Pot (Leads To Case, 1 Min.) : 2500 VDC
Typical Response Time: <25 Nano-seconds
Epoxy Rating: 94V-0
Current∕Energy Derating (>85℃ ): -2.5 ﹪∕℃
DC Leakage Current:
200μA maximum (at rated DC working voltage )
Solder ability: MIL-STD-202F
Power Dissipation Ratings(P, in-watts):
Disc Size
11Vac~40Vac
50Vac~680Vac
5mm
0.01
0.15
7mm
0.02
0.25
10mm
0.05
0.4
14mm
0.1
0.6
18mm
0.8
20mm
0.2
1.0
25mm
1.2
32mm
1.6
34mm(single)
2.1
34mm(dual)
2.73
40mm
2.1
53mm
2.5
All definitions are according to IEEE specifications C62.33.
■ Energy Derating Versus Temperature
■ Peak Current Per Pulse Versus Pulse Duration
120%
100%
80%
60%
40%
20%
0%
-55
50
60
70
80
90
100
110
120
130
Ambient Temperature, ℃


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