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ETFV25 Datasheet(PDF) 5 Page - EPCOS

Part # ETFV25
Description  SIOV metal oxide varistors Housed (ThermoFuse) varistors, AdvanceD series
PDF  10 Pages
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Manufacturer  EPCOS [EPCOS]
Direct Link  http://www.epcos.com
Logo EPCOS - EPCOS

ETFV25 Datasheet(HTML) 5 Page - EPCOS

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Reliability data
Test
Test methods/conditions
Requirement
Varistor voltage
The voltage between two terminals with
the specified measuring current applied
is called VV (1 mADC @ 0.2 ... 2 s).
To meet the specified value
Clamping voltage
The maximum voltage between two
terminals with the specified standard
impulse current (8/20 µs) applied.
To meet the specified value
Surge current derating,
8/20
µs
CECC 42 000, test C 2.1
100 surge currents (8/20 µs), unipolar,
interval 30 s, amplitude corresponding
to derating curve for 100 impulses at
20 µs
|
∆V/V (1 mA)| ≤10%
(measured in direction of
surge current)
No visible damage
Surge current derating,
2 ms
CECC 42 000, test C 2.1
100 surge currents (2 ms), unipolar,
interval 120 s, amplitude corresponding
to derating curve for 100 impulses at 2
ms
|
∆V/V (1 mA)| ≤10%
(measured in direction of
surge current)
No visible damage
Abnormal overvoltage
test
UL1449, limited current abnormal
overvoltage test. Apply a high AC
voltage to ThermoFuse varistor, the
amplitude of overvoltage and current
limit will be adopted from UL1449
general instruction in section 37. The
specimen will be tested on a softwood
surface covered with a double layer of
white tissue paper. The specimen is to
be loosely draped with a double layer
of cheesecloth.
The cheesecloth shall cover openings
where flame, molten or other particles
may be expelled as a result of the test.
The test result will be visually
inspected.
Any of these phenomena shall
not be observed, or this
specimen will be judged as
failed part.
1.
Emission of flame, molten
metal, glowing or flaming
particles through any
openings (pre-existed or
created as a result of the
test) in the product.
2.
Charring, glowing, or
flaming of the supporting
surface, tissue paper, or
cheesecloth.
3.
Ignition of the enclosure.
4.
Creation of any openings
in the enclosure that
result in accessibility of
live parts, when judged in
accordance with
accessibility of live parts,
UL1449 section 13.
Housed varistors
ETFV25
ThermoFuse varistors, ETFV25 series
Page 5 of 10
Please read Cautions and warnings and
Important notes at the end of this document.



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