SIOV metal oxide varistors
Housed (ThermoFuse) varistors, AdvanceD series
Series/Type:
Date:
ETFV20
April 2011
© EPCOS AG 2011. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Housed varistors
ThermoFuse varistors, ETFV20 series
ETFV20
Construction
Round varistor element, leaded
Coating: epoxy resin, flame-retardant to UL 94 V-0
Terminals: tinned copper wire, metal compound wire
Housing: thermoplastic, flame-retardant to UL 94 V-0
Features
Wide operating voltage range 130 … 420 V
RMS
Self-protected under abnormal overvoltage conditions
High-energy AdvanceD series E2
Approvals
UL
IEC
VDE
Applications
Air conditioner, refrigerator, TV, etc.
Power meter, inverter, telecom equipment, etc.
Transient voltage surge suppressors (TVSS)
Solar inverter
Delivery mode
Bulk (standard)
Typical applications
General technical data
Climatic category
Operating temperature
Storage temperature
Electric strength
Insulation resistance
Response time
Please read
Cautions and warnings
and
Important notes
at the end of this document.
to IEC 60068-1
to IEC 61051
to IEC 61051
to IEC 61051
40/85/56
40 ... + 85
40 ... + 85
≥
2.5
≥
100
< 25
°C
°C
kV
RMS
MΩ
ns
Page 2 of 15
Housed varistors
ThermoFuse varistors, ETFV20 series
ETFV20
Reliability data
Test
Varistor voltage
Test methods/conditions
Requirement
The voltage between two terminals with To meet the specified value
the specified measuring current applied
is called V
V
(1 mA
DC
@ 0.2 ... 2 s).
The maximum voltage between two
terminals with the specified standard
impulse current (8/20 µs) applied.
1000 h at UCT
After having continuously applied the
maximum allowable AC voltage at UCT
±2 °C
for 1000 h, the specimen shall be
stored at room temperature and normal
humidity for 1 to 2 h.
Thereafter, the change of V
V
shall be
measured.
10 surge currents (8/20
µs),
unipolar,
interval 30 s, amplitude corresponding
to derating curve for 10 impulses at
20
µs
|∆V/V (1 mA)|
≤10%
(measured in direction of
surge current)
No visible damage
To meet the specified value
Clamping voltage
Endurance at upper
category temperature
|∆V/V (1 mA)|
≤10%
Surge current derating,
8/20
µs
Surge current derating,
2 ms
10 surge currents (2 ms), unipolar,
|∆V/V (1 mA)|
≤10%
interval 120 s, amplitude corresponding (measured in direction of
to derating curve for 10 impulses at
surge current)
2 ms
No visible damage
IEC 61051-1, test 4.9.2
Metal balls method, 2500 V
RMS
, 60 s
The varistor is placed in a container
holding 1.6
±0.2
mm diameter metal
balls such that only the terminations of
the varistor are protruding.
The specified voltage shall be applied
between both terminals of the specimen
connected together and the electrode
inserted between the metal balls.
No breakdown
Electric strength
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 15
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