ETFV25K175E4 EPCOS Inc, ETFV25K175E4 Datasheet - Page 5

• Manufacturer Part Number: ETFV25K175E4
• Description: VARISTOR THERMAL 175VRMS 25MM
• Manufacturer: EPCOS Inc
• Series: ThermoFuser

Specifications of ETFV25K175E4

• Varistor Voltage: 270V
• Current-surge: 20kA
• Number Of Circuits: 1
• Maximum Ac Volts: 175VAC
• Maximum Dc Volts: 225VDC
• Energy: 245J
• Package / Case: Disc 25mm
• Product: MOV
• Voltage Rating Dc: 225 V
• Voltage Rating Ac: 175 V
• Clamping Voltage: 455 V
• Peak Surge Current: 20 KA
• Surge Energy Rating: 245 J
• Capacitance: 1500 pF
• Operating Temperature Range: - 40 C to + 85 C
• Mounting: Radial
• Dimensions: 25 mm Dia. x 11.2 mm W x 35.2 mm L x 35.2 mm H
• Lead Spacing: 6.35 mm
• Termination Style: Through Hole
• Tolerance: 10 %
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 495-3649

Reliability data
Test
Varistor voltage
Clamping voltage
Surge current derating,
8/20 s
Surge current derating,
2 ms
Abnormal overvoltage
test
Please read Cautions and warnings and
Important notes at the end of this document.
Housed varistors
ThermoFuse varistors, ETFV25 series
Test methods/conditions
The voltage between two terminals with
the specified measuring current applied
is called V
The maximum voltage between two
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
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
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.
V
(1 mA
DC
Page 5 of 10
@ 0.2 ... 2 s).
Requirement
To meet the specified value
To meet the specified value
| V/V (1 mA)| 10%
(measured in direction of
surge current)
No visible damage
| V/V (1 mA)| 10%
(measured in direction of
surge current)
No visible damage
Any of these phenomena shall
not be observed, or this
specimen will be judged as
failed part.
1.
2.
3.
4.
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.
Charring, glowing, or
flaming of the supporting
surface, tissue paper, or
cheesecloth.
Ignition of the enclosure.
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.
ETFV25