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SIOV metal oxide varistors
Housed (ThermoFuse) varistors, AdvanceD series
Series/Type:
Date:
ETFV25
February 2010
© EPCOS AG 2010. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.

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Housed varistors
ThermoFuse varistors, ETFV25 series
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 115 … 420 VRMS
Self-protected under abnormal overvoltage conditions
Very high surge current ratings of 20 kA
Approvals
UL
Applications
Air conditioner, refrigerator, TV, etc.
Power meter, inverter, telecom equipment, etc.
Transient voltage surge suppressors (TVSS)
Delivery mode
Bulk (standard)
Typical applications
ETFV25
General technical data
Climatic category
Operating temperature
Storage temperature
Electric strength
Response time
to IEC 60068-1
to CECC 42 000
to CECC 42 000
40/85/56
40 ... + 85
40 ... +125
2.5
< 25
°C
°C
kVRMS
ns
Please read Cautions and warnings and
Important notes at the end of this document.
Page 2 of 10

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Housed varistors
ThermoFuse varistors, ETFV25 series
ETFV25
Electrical specifications and ordering codes
Maximum ratings (TA = 85 °C)
Ordering code
Type
(untaped)
SIOV-
VRMS
VDC
imax
Wmax
Pmax
(8/20 µs) (2 ms)
V VA
JW
B72225T4111K101
B72225T4131K101
B72225T4141K101
B72225T4151K101
B72225T4171K101
B72225T4211K101
B72225T4231K101
B72225T4251K101
B72225T4271K101
B72225T4301K101
B72225T4321K101
B72225T4351K101
B72225T4381K101
B72225T4421K101
ETFV25K115E4
ETFV25K130E4
ETFV25K140E4
ETFV25K150E4
ETFV25K175E4
ETFV25K210E4
ETFV25K230E4
ETFV25K250E4
ETFV25K275E4
ETFV25K300E4
ETFV25K320E4
ETFV25K350E4
ETFV25K385E4
ETFV25K420E4
115 150 20000 170 1.0
130 170 20000 185 1.0
140 180 20000 195 1.0
150 200 20000 215 1.0
175 225 20000 245 1.0
210 270 20000 290 1.0
230 300 20000 315 1.0
250 320 20000 345 1.0
275 350 20000 375 1.0
300 385 20000 410 1.0
320 420 20000 445 1.0
350 460 20000 495 1.0
385 505 20000 600 1.0
420 560 20000 700 1.0
Characteristics (TA = 25 °C)
Ordering code
Type
(untaped)
SIOV-
B72225T4111K101
B72225T4131K101
B72225T4141K101
B72225T4151K101
B72225T4171K101
B72225T4211K101
B72225T4231K101
B72225T4251K101
B72225T4271K101
B72225T4301K101
B72225T4321K101
B72225T4351K101
B72225T4381K101
B72225T4421K101
ETFV25K115E4
ETFV25K130E4
ETFV25K140E4
ETFV25K150E4
ETFV25K175E4
ETFV25K210E4
ETFV25K230E4
ETFV25K250E4
ETFV25K275E4
ETFV25K300E4
ETFV25K320E4
ETFV25K350E4
ETFV25K385E4
ETFV25K420E4
Vv
(1 mA)
V
180
205
220
240
270
330
360
390
430
470
510
560
620
680
Vv
vc,max
(1 mA) (ic)
%V
±10 300
±10 340
±10 360
±10 395
±10 455
±10 545
±10 595
±10 650
±10 710
±10 775
±10 840
±10 910
±10 1025
±10 1120
ic Ctyp
(1 kHz)
A pF
150 2280
150 2010
150 1860
150 1740
150 1500
150 1245
150 1140
150 1050
150 945
150 870
150 810
150 750
150 675
150 630
Please read Cautions and warnings and
Important notes at the end of this document.
Page 3 of 10

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Housed varistors
ThermoFuse varistors, ETFV25 series
ETFV25
Dimensional drawings
Weight
Nominal diameter
mm
25
VRMS
V
115 ... 420
Weight
g
13.3 ... 16.3
Lead configuration
Please read Cautions and warnings and
Important notes at the end of this document.
Page 4 of 10

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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