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Housed Varistor

ThermoFuse Varistor

Series/Type: T14K130…420E2

Ordering code: B72214T2***K105

Date: 2013-01-019

Version: c

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Identification/Classification 1

(header 1 + top left header bar):

Housed Varistor

Identification/Classification 2

(header 2 + bottom left header bar):

ThermoFuse Varistor

Ordering code: (top right header bar) B72214T2***K105

Series/Type: (top right header bar) T14K130…420E2

Preliminary data (optional):

(if necessary)

Department: ZH FTZ PPD PD

Date: 2013-01-019

Version: c

Prepared by: Rongguang Zhang

Release signed by: Terry Tian

Release signed QS: Mac Gao

Modifications/Remarks: Update approval according to UL1449 3

edition.

Housed Varistor B72214T2***K105

ThermoFuse Varistor T14K130…420E2

ZH FTZ PPD PD 2013-01-019

Please read Cautions and warnings and Page 2 of 10

Important notes at the end of this document.

Applications

◆ Overvoltage protection with integrated thermal fuse

◆ Suitable for use in industrial and household appliance applications

Features

◆ Three-leaded version for failure indication

◆ UL approval to UL1449 3

edition (File number E321126)

◆ Approval pending to IEC61051 and VDE

◆ High peak surge current rating of 6 kA at single 8/20us impulse

◆ Meet thermal stability according to section 8.3.5.2 of IEC 61643-11

◆ Failure safe for abnormal over voltage (see “Reliability Data Electrical, Abnormal over voltage”)

Nomenclature

T = EPCOS ThermoFuse varistor

14 = Rated disk diameter (mm)

K = Tolerance of V

at 1 mA: ±10%

*** = Max. AC voltage (see table on page 3)

E2 = Energy absorption characteristics, AdvanceD series

Dimensional drawing in mm

Housed Varistor B72214T2***K105

ThermoFuse Varistor T14K130…420E2

ZH FTZ PPD PD 2013-01-019

Please read Cautions and warnings and Page 3 of 10

Important notes at the end of this document.

General technical data

Climatic category to IEC 60068-1 40 / 85 / 56

Operating temperature -40…+85 °C

Storage temperature -40…+85 °C

Electric strength ≥2.5 kV

RMS

Insulation resistance ≥ 100 MΩ

Response time < 25 ns

Electrical data

Maximum ratings (85 °C):

Ordering code Type

Max.

operating

AC voltage

RMS

[ V ]

Max.

operating

voltage

[ V ]

Surge

current

max

(8/20 µs)

1 time

[ A ]

Nominal

discharge

current In

(8/20 µs)

15 times

[ A ]

Energy

absorption

(2 ms)

1 time

[ J ]

Max.

average

power

dissipation

max

[ W ]

B72214T2131K105

T14K130E2

130 170 6000 3000 50 0.6

B72214T2151K105

T14K150E2

150 200 6000 3000 60 0.6

B72214T2171K105

T14K175E2

175 225 6000 3000 70 0.6

B72214T2231K105

T14K230E2

230 300 6000 3000 90 0.6

B72214T2251K105

T14K250E2

250 320 6000 3000 100 0.6

B72214T2271K105

T14K275E2

275 350 6000 3000 110 0.6

B72214T2301K105

T14K300E2

300 385 6000 3000 125 0.6

B72214T2321K105

T14K320E2

320 420 6000 3000 136 0.6

B72214T2351K105

T14K350E2

350 460 6000 3000 150 0.6

B72214T2381K105

T14K385E2

385 505 6000 3000 165 0.6

B72214T2421K105

T14K420E2

420 560 6000 3000 180 0.6

Characteristics (25 °C):

Ordering code Type

Varistor

voltage V

at 1 mA

[ V ]

Clamping voltage V

at 50 A

(8 / 20 µs)

[ V ]

Typ. capacitance C

typ

at 1 kHz

[ pF ]

B72214T2131K105

T14K130E2

205 ±10% 340 880

B72214T2151K105

T14K150E2

240 ±10% 395 750

B72214T2171K105

T14K175E2

270 ±10% 455 670

B72214T2231K105

T14K230E2

360 ±10% 595 530

B72214T2251K105

T14K250E2

390 ±10% 650 490

B72214T2271K105

T14K275E2

430 ±10% 710 440

B72214T2301K105

T14K300E2

470 ±10% 775 400

B72214T2321K105

T14K320E2

510 ±10% 840 370

B72214T2351K105

T14K350E2

560 ±10% 910 340

B72214T2381K105

T14K385E2

620 ±10% 1025 315

B72214T2421K105

T14K420E2

680 ±10% 1120 290

1) Note: nominal discharge current is the specification defined in UL1449 3rd and tested with 8/20µs current waveform.

Housed Varistor B72214T2***K105

ThermoFuse Varistor T14K130…420E2

ZH FTZ PPD PD 2013-01-019

Please read Cautions and warnings and Page 4 of 10

Important notes at the end of this document.

v/i characteristic

Derating curves

Housed Varistor B72214T2***K105

ThermoFuse Varistor T14K130…420E2

ZH FTZ PPD PD 2013-01-019

Please read Cautions and warnings and Page 5 of 10

Important notes at the end of this document.

Typical application

The typical application below shows how the monitor lead on the device can be used to indicate that

the thermal fuse has been opened. This denotes that the circuit will be no longer protected from surge

currents by the MOV after the thermal fuse forms open circuit.

Typical wave soldering curve

Care must be taken when soldering the device into place because it contains a thermal fuse element.

Two soldering methods are possible: (1) Manual soldering under max. 350℃ / 3s: it is recommended

to heat-sink the leads of the device. (2) Wave soldering: it is very important that the temperatures of

all preheat stages and the solder bath should be strictly controlled.

Housed Varistor B72214T2***K105

ThermoFuse Varistor T14K130…420E2

ZH FTZ PPD PD 2013-01-019

Please read Cautions and warnings and Page 6 of 10

Important notes at the end of this document.

Reliability Data Electrical

Characteristics

Test methods / Description Specifications

Varistor

voltage

The voltage between two terminals with the

specified measuring current applied is called V

(1 mA

@ 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) illustrated below applied.

Rise Time µs

Decay time to half value µs

Nominal start

Peak value

Peak

Trailing Edge

Leading

Edge

To meet the

specified value.

Surge current

derating,

8/20 µs

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

Surge current

derating,

2 ms

10 surge currents (2ms), unipolar, interval 120s,

amplitude corresponding to derating curve for 10

impulses at 2 ms

|∆V/V (1 mA)|≤10%

(measured in

direction of surge

current)

No visible damage

Housed Varistor B72214T2***K105

ThermoFuse Varistor T14K130…420E2

ZH FTZ PPD PD 2013-01-019

Please read Cautions and warnings and Page 7 of 10

Important notes at the end of this document.

Characteristics

Test Methods/Description Specifications

Abnormal over

voltage

This device is designed to form open circuit in the event

of overheating due to the limited current abnormal over

voltage conditions as outlined in section 39.4 of UL1449

edition.

The device (pin 1 & 3) is to be connected to a power

supply having an open circuit voltage equal to the test

voltage specified below. The power supply is to

incorporate a series variable resistor that can be

adjusted to obtain the short-circuit current (I

). The

variable resistor is to be adjusted such that I

equals

10A, 5A, 2.5A, 0.5A or 0.125A respectively (measured

without the device in the circuit). The device will be

energized for 7 hours, or until the device becomes

disconnected from the power supply, or until current to,

or temperature within the device attains equilibrium

The test result will be visually inspected.

Detailed test voltages applied onto the devices are as

below:

Device rating

Test voltage

Type ( V ac) ( V ac )

T14K130E2 130 260

T14K150E2 150 300

T14K175E2 175 350

T14K230E2 230 415

T14K250E2 250 500

T14K275E2 275 480

T14K300E2 300 600

T14K320E2 320 600

T14K350E2 350 600

T14K385E2 385 600

T14K420E2 420 600

Any of below

phenomena shall not be

observed, otherwise this

device 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

device.

2. Charring, glowing, or

flaming of the

supporting surface, or

cheesecloth draped on

the device.

3. Ignition of the

enclosure.

4. Creation of any

openings in the

enclosure that result in

accessibility of live

parts.

2) Note:

Thermal fuse may not form open circuit under low current [e.g. 0.125A] due to less heat generated by MOV, however the

device will reach thermal equilibrium within 30 minutes under a low temperature which will not be able to cause any damage

to the device.

Housed Varistor B72214T2***K105

ThermoFuse Varistor T14K130…420E2

ZH FTZ PPD PD 2013-01-019

Please read Cautions and warnings and Page 8 of 10

Important notes at the end of this document.

Cautions and warnings

General

1. EPCOS metal oxide varistors (SIOVs) are designed for specific applications and should not be

used for purposes not identified in our specifications, application notes and data books unless

otherwise agreed with EPCOS during the design-in-phase.

2. Ensure suitability of SIOVs through reliability testing during the design-in phase. The SIOVs

should be evaluated taking into consideration worst-case conditions.

3. For applications of SIOVs in line-to ground circuits based on various international and local

standards there are restrictions existing or additional safety measures required.

Storage

1. Store SIOVs only in original packaging. Do not open the package before storage.

2. Storage conditions in original packaging:

Storage temperature: -25 °C … +45 °C

Relative humidity: <75% annual average,

<95% on maximum 30 days a year.

Dew precipitation: Is to be avoided.

3. Avoid contamination of SIOVs surface during storage, handling and processing.

4. Avoid storage of SIOVs in harmful environments which can affect the function during long-term

operation (examples given under operation precautions).

5. The SIOV type series should be soldered within the time specified.

SIOV-S, -Q, -LS 24 month

T, ETFV and SFS types 12 month.

Handling

1. SIOVs must not be dropped.

2. Components must not be touched with bare hands. Gloves are recommended.

3. Avoid contamination of the surface of SIOV electrodes during handling, be careful of the sharp

edge of SIOV electrodes.

Housed Varistor B72214T2***K105

ThermoFuse Varistor T14K130…420E2

ZH FTZ PPD PD 2013-01-019

Please read Cautions and warnings and Page 9 of 10

Important notes at the end of this document.

Soldering (where applicable)

1. Use rosin-type flux or non-activated flux.

2. Insufficient preheating may cause ceramic cracks.

3. Rapid cooling by dipping in solvent is not recommended.

4. Complete removal of flux is recommended.

Mounting

1. Potting, sealing or adhesive compounds can produce chemical reactions in the SIOV ceramic

that will degrade the component’s electrical characteristics.

2. Overloading SIOVs may result in ruptured packages and expulsion of hot materials. For this

reason the SIOVs should be physically shielded from adjacent components.

Operation

1. Use SIOVs only within the specified temperature operating range

2. Use SIOVs only within the specified voltage and current ranges.

3. Environmental conditions must not harm the SIOVs. Use SIOVs only in normal atmospheric con-

ditions. Avoid use in the presence of deoxidizing gases (chlorine gas, hydrogen sulfide gas,

ammonia gas, sulfuric acid gas, etc), corrosive agents, humid or salty conditions, Avoid contact

with any liquids and solvents.

Important notes

Page 10 of 10

The following applies to all products named in this publication:

1. Some parts of this publication contain statements about the suitability of our products for

certain areas of application. These statements are based on our knowledge of typical

requirements that are often placed on our products in the areas of application concerned. We

nevertheless expressly point out that such statements cannot be regarded as binding

statements about the suitability of our products for a particular customer application. As a

rule, EPCOS is either unfamiliar with individual customer applications or less familiar with them

than the customers themselves. For these reasons, it is always ultimately incumbent on the

customer to check and decide whether an EPCOS product with the properties described in the

product specification is suitable for use in a particular customer application.

2. We also point out that in individual cases, a malfunction of electronic components or failure

before the end of their usual service life cannot be completely ruled out in the current state

of the art, even if they are operated as specified. In customer applications requiring a very high

level of operational safety and especially in customer applications in which the malfunction or

failure of an electronic component could endanger human life or health (e.g. in accident

prevention or life-saving systems), it must therefore be ensured by means of suitable design of the

customer application or other action taken by the customer (e.g. installation of protective circuitry

or redundancy) that no injury or damage is sustained by third parties in the event of malfunction or

failure of an electronic component.

3. The warnings, cautions and product-specific notes must be observed.

4. In order to satisfy certain technical requirements, some of the products described in this

publication may contain substances subject to restrictions in certain jurisdictions (e.g.

because they are classed as hazardous). Useful information on this will be found in our Material

Data Sheets on the Internet (www.epcos.com/material). Should you have any more detailed

questions, please contact our sales offices.

5. We constantly strive to improve our products. Consequently, the products described in this

publication may change from time to time. The same is true of the corresponding product

specifications. Please check therefore to what extent product descriptions and specifications

contained in this publication are still applicable before or when you place an order.

We also reserve the right to discontinue production and delivery of products. Consequently,

we cannot guarantee that all products named in this publication will always be available.

The aforementioned does not apply in the case of individual agreements deviating from the

foregoing for customer-specific products.

6. Unless otherwise agreed in individual contracts, all orders are subject to the current version of

the “General Terms of Delivery for Products and Services in the Electrical Industry”

published by the German Electrical and Electronics Industry Association (ZVEI).

7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CeraLink, CSMP, CSSP, CTVS, DeltaCap,

DigiSiMic, DSSP, FilterCap, FormFit, MiniBlue, MiniCell, MKD, MKK, MLSC, MotorCap, PCC,

PhaseCap, PhaseCube, PhaseMod, PhiCap, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD,

SiMic, SIMID, SineFormer, SIOV, SIP5D, SIP5K, ThermoFuse, WindCap are trademarks

registered or pending in Europe and in other countries. Further information will be found on the

Internet at www.epcos.com/trademarks.