B72225T4141K101 Просмотр технического описания (PDF) - EPCOS AG

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Компоненты Описание

производитель

B72225T4141K101

SIOV metal oxide varistors

EPCOS AG 

Housed varistors

ThermoFuse varistors, ETFV25 series

ETFV25

Reliability data

Test

Varistor voltage

Clamping voltage

Surge current derating,

8/20 µs

Surge current derating,

2 ms

Abnormal overvoltage

test

Test methods/conditions

Requirement

The voltage between two terminals with To meet the specified value

the specified measuring current applied

is called VV (1 mADC @ 0.2 ... 2 s).

The maximum voltage between two To meet the specified value

terminals with the specified standard

impulse current (8/20 µs) applied.

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

CECC 42 000, test C 2.1

|∆V/V (1 mA)| ≤10%

100 surge currents (2 ms), unipolar, (measured in direction of

interval 120 s, amplitude corresponding surge current)

to derating curve for 100 impulses at 2 No visible damage

ms

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.

Please read Cautions and warnings and

Important notes at the end of this document.

Page 5 of 10

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