# TVS Varistor, 175 V, 225 V, ThermoFuse T, 455 V, SIP, Metal Oxide Varistor (MOV)
**URL**: https://novapart.co/products/B72214T2171K105/tvs-varistor-175-v-225-thermofuse-t-455-sip-metal
**SKU**: B72214T2171K105
**Manufacturer**: TDK
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Varistors
**Price**: €0.5910
**Stock**: 10+
**Lead Time**: 95 days (indicative)
## Description
Voltage Rating VAC:175V; Voltage Rating V DC:225V; Product Range:ThermoFuse T Series; Clamping Voltage Vc Max:455V; Varistor Case Style:SIP; Varistor Type:Metal Oxide Varistor (MOV);
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| Product Range | ThermoFuse T |
| Varistor Type | Metal Oxide Varistor (MOV) |
| Voltage Rating Vac | 175V |
| Voltage Rating Vdc | 225V |
| Varistor Case Style | SIP |
| Clamping Voltage Vc Max | 455V |
| Peak Energy (10/1000Us) | 70J |
| Operating Temperature Max | - |
| Operating Temperature Min | - |
| Peak Surge Current @ 8/20Μs | 6kA |
| Automotive Qualification Standard | - |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:2456261/)
## **SIOV metal oxide varistors**
Housed (ThermoFuse) varistors, AdvanceD series
**Series/Type: T14 series** Date: January 2026
© TDK Electronics AG 2026. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without TDK Electronics’ prior express consent is prohibited.
**Housed varistors T14 series ThermoFuse varistors**
## **Construction**
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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**
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Wide operating voltage range 130 … 420 VRMS Self-protected under abnormal overvoltage conditions High-energy AdvanceD series E2
## **Approvals**
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UL 1449 (file number E321126)
IEC (certificate number 101-QA-10 IECQ)
VDE (certificate number 40031102)
## **Applications**
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Houshold appliances
Power supply units
Inverters in solar power systems Lighting applications Communication and data systems Transient voltage surge suppressors (TVSS) Electronic metering
## **Delivery mode Typical applications**
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Tray packing
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## **General technical data**
|Climatic category
to IEC 60068-1
Operating temperature
to IEC 61051
Storage temperature
Electric strength
to IEC 61051
Insulation resistance
to IEC 61051|40/85/56
�40 ... + 85
°
�40 ... + 85
°
≥2.5
k
≥100
M|C
C
VRMS
Ω|
|---|---|---|
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 2 of 14
**Housed varistors ThermoFuse varistors**
## **T14 series**
## **Electrical specifications and ordering codes Maximum ratings (TA = 85** ° **C)**
|**Maximum ratings (**|**TA = 85**°**C)**|||||||
|---|---|---|---|---|---|---|---|
|Ordering code|Type
(untaped)
SIOV-|VRMS
V|VDC
V|imax
(8/20 µs)
A|In1)
(8/20 µs)
15 times
A|Wmax
(2 ms)
J|
Pmax
W|
|B72214T2131K105
B72214T2151K105
B72214T2171K105
B72214T2231K105
B72214T2251K105
B72214T2271K105
B72214T2301K105
B72214T2321K105
B72214T2351K105
B72214T2381K105
B72214T2421K105|T14K130E2
T14K150E2
T14K175E2
T14K230E2
T14K250E2
T14K275E2
T14K300E2
T14K320E2
T14K350E2
T14K385E2
T14K420E2|130
150
175
230
250
275
300
320
350
385
420|170
200
225
300
320
350
385
420
460
505
560|6000
6000
6000
6000
6000
6000
6000
6000
6000
6000
6000|3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000|50
60
70
90
100
110
125
136
150
165
180|0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6|
> **1) Note:** Nominal discharge current In according to UL 1449, 4th edition.
**Characteristics (TA = 25** ° **C)**
|Ordering code|Type
(untaped)
SIOV-|Vv
(1 mA)
V|∆Vv
(1 mA)
%|vc,max
(ic)
V|ic
A|Ctyp
(1 kHz)
pF|
|---|---|---|---|---|---|---|
|B72214T2131K105
B72214T2151K105
B72214T2171K105
B72214T2231K105
B72214T2251K105
B72214T2271K105
B72214T2301K105
B72214T2321K105
B72214T2351K105
B72214T2381K105
B72214T2421K105|T14K130E2
T14K150E2
T14K175E2
T14K230E2
T14K250E2
T14K275E2
T14K300E2
T14K320E2
T14K350E2
T14K385E2
T14K420E2|205
240
270
360
390
430
470
510
560
620
680|±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10|340
395
455
595
650
710
775
840
910
1025
1120|50
50
50
50
50
50
50
50
50
50
50|880
750
670
530
490
440
400
370
340
315
290|
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 3 of 14
**Housed varistors ThermoFuse varistors**
**T14 series**
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## **Dimensional drawings in mm**
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## **Weight**
|Nominal diameter
mm|VRMS
V|Weight
g|
|---|---|---|
|14|130 ... 420|4.1 ... 6.1|
## **Lead configuration**
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Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 4 of 14
|**Housed varistors**|**T14 series**|
|---|---|
|**ThermoFuse varistors**||
|**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(8/20µs)applied.|To meet the specified value|
|Endurance at upper
category temperature|
1000 h at UCT
After having continuously applied the
maximum allowable AC voltage at UCT
±2°C for 1000 h, the specimen shall be
stored at room temperature and normal
humidity for 1 to 2 h.
Thereafter, the change of VVshall be
measured.||∆V/V (1 mA)|≤10%|
|Surge current
derating, 8/20µs|10 surge currents (8/20µs), unipolar,
interval 30 s, amplitude corresponding to
derating curve for 10 impulses at 20µs||∆V/V (1 mA)|≤10%
(measured in direction of surge
current)
No visible damage|
|Surge current
derating, 2 ms|10 surge currents (2 ms), unipolar,
interval 120 s, 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|
|Electric strength|IEC 61051-1, test 4.9.2
Metal balls method, 2500 VRMS, 60 s
The varistor is placed in a container
holding 1.6±0.2 mm diameter metal balls
such that only the terminations of the
varistor are protruding.
The specified voltage shall be applied
between both terminals of the specimen
connected together and the electrode
inserted between the metal balls.|No breakdown|
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 5 of 14
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|**Housed varistors**|**T14 series**|
|---|---|
|**ThermoFuse varistors**||
|Test|Test methods/ conditions|Requirement|
|---|---|---|
|Climatic sequence|The specimen shall be subjected to:
a) dry heat at UCT, 16 h, IEC 60068-2-2,
test Ba
b) damp heat, 1st cycle: 55°C, 93% r. H.,
24 h, IEC 60068-2-30, test Db.
c) cold, LCT, 2 h, IEC 60068-2-1, test Aa.
d) damp heat, additional 5 cycles:
55°C/25°C, 93% r. H., 24 h/cycle,
IEC 60068-2-30, test Db.
Then the specimen shall be stored at
room temperature and normal humidity
for 1 to 2 h.
Thereafter, the change of VVshall be
measured. Thereafter, insulation resis-
tance Rinsshall be measured at
V = 500 V.||∆V/V (1 mA)|≤10%
Rins≥100 MΩ|
|Rapid change of
temperature|IEC 60068-2-14, test Na, LCT/UCT,
dwell time 30 min, 5 cycles||∆V/V (1 mA)|≤5%
No visible damage|
|Damp heat, steady
state|IEC 60068-2-78, test Ca
The specimen shall be subjected to
40±2°C, 90 to 95% r. H. for 56 days
without load / with 10% of the maxi-
mum continuous DC operating voltage
VDC. Then stored at room temperature
and normal humidity for 1 to 2 h.
Thereafter, the change of VVshall be
measured. Thereafter, insulation resis-
tance Rinsshall be measured at V = 500 V
(insulated varistors only).||∆V/V (1 mA)|≤10%
Rins≥100 MΩ|
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 6 of 14
|||**T14 series**||
|---|---|---|---|
|**Housed varistors**||**T14 series**||
|**ThermoFuse varistors**||||
|||||
|Test|Test methods/ conditions|Requirement||
|Solderability|IEC 60068-2-20, test Ta,
method 1 with modified conditions for
lead-free solder alloys: 245°C, 3 s:
After dipping the terminals to a depth of
approximately 3 mm from the body in a
soldering bath of 245°C for 3 s, the
terminals shall be visually examined.|The inspection must be carried
out under adequate light with
normal eyesight or with the
assistance of a magnifier
capable of giving a
magnification of 4 to 10 times.
The dipped surface must be
covered with a smooth and
bright solder coating with no
more than small amounts of
scattered imperfections such as
pinholes or un-wetted or
de-wetted areas. These
imperfections must not be
concentrated in one area.||
|Resistance to
soldering heat|IEC 60068-2-20, test Tb, method 1A,
260°C, 10 s:
Each lead shall be dipped into a solder
bath having a temperature of 260±5°C
to a point 2.0 to 2.5 mm from the body of
the specimen, be held there for 10±1 s
and then be stored at room temperature
and normal humidity for 1 to 2 h.
The change of VVshall be measured and
the specimen shall be visuallyexamined.||∆V/V (1 mA)|≤5%
No visible damage||
|Tensile strength|IEC 60068-2-21, test Ua1
After gradually applying the force
specified below and keeping the unit fixed
for 10 s, the terminal shall be visually
examined for any damage.
Force for wire diameter:
0.6 mm = 10 N
0.8 mm = 10 N
1.0 mm = 20 N||∆V/V (1 mA)|≤5%
No break of solder joint,
no wire break||
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 7 of 14
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|**Housed varistors**|**T14 series**|
|---|---|
|**ThermoFuse varistors**||
|Test|Test methods/ conditions|Test methods/ conditions|Requirement|
|---|---|---|---|
|Vibration|IEC 60068-2-6, test Fc, method B4
Frequency range:
Amplitude:
Duration:
Pulse:
10 … 55 Hz
0.75 mm or 98 m/s2
6 h (3 · 2 h)
sine wave
After repeatedly applying a single
harmonic vibration according to the table
above.
The change of VVshall be measured and
the specimenshallbevisually examined.|||∆V/V (1 mA)|≤5%
No visible damage|
|Bump|IEC 60068-2-29, test Eb
Pulse duration:
Max. acceleration:
Number of bumps:
Pulse:
6 ms
400 m/s2
4000
half sine|||∆V/V (1 mA)|≤5%
No visible damage|
|Fire hazard|IEC 60695-11-5 (needle flame test)
Severity: vertical 10 s||5 s max.|
|Abnormal
overvoltage test|The device is designed to meet the
limited current abnormal overvoltage
condition, outlined in section 39.4 of
UL 1449, 4th edition.
Detailed test voltage applied onto the
device for different types as in the
followingtable:
Type
Device
rating
VRMS
Test
voltage
VRMS
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||None of the following
phenomena shall 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-existing 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
evaluated in accordance
with accessibility of live
parts test in section 58.2
ofUL1449,4th edition.|
||Type|Device
rating
VRMS||
||T14K130E2|130||
||T14K150E2|150||
||T14K175E2|175||
||T14K230E2|230||
||T14K250E2|250||
||T14K275E2|275||
||T14K300E2|300||
||T14K320E2|320||
||T14K350E2|350||
||T14K385E2|385||
||T14K420E2|420||
|||||
## **Note:**
UCT = Upper category temperature, LCT = Lower category temperature, Rins = Insulation resistance. All electrical tests should be performed between pin 1 and pin 3.
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 8 of 14
**Housed varistors ThermoFuse varistors**
**T14 series**
## **v/i characteristics**
v = f (i) for explanation of the characteristics refer to "General technical information", chapter 1.6.3 A = Leakage current, B = Protection level } for worst-case varistor tolerances
**SIOV-T14 ... E2**
## **Derating curves**
Maximum surge current imax = f (tr, pulse train) For explanation of the derating curves refer to "General technical information", section 1.8.1
**SIOV-T14 ... E2**
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 9 of 14
**Housed varistors T14 series ThermoFuse varistors**
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## **Cautions and warnings**
## **General**
1. TDK metal oxide varistors 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 TDK Electronics during the design-in-phase.
2. Ensure suitability of SIOVs through reliability testing during the design-in phase. 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 prior to processing.
2. Recommended 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 an SIOV's during storage, handling and processing.
4. Avoid storage of SIOVs in harmful environments that can affect the function during long-term operation (examples given under operation precautions).
5. The SIOV type series should be soldered after shipment from TDK within the time specified:
SIOV-S, -Q, -LS, -B, -SNF 24 months ETFV/ T series, -CU 12 months.
## **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.
## **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.
5. Temperatures of all preheat stages and the solder bath must be strictly controlled especially for T series (T14 and T20).
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 10 of 14
|**Housed varistors**|**T14 series**|
|---|---|
|**ThermoFuse varistors**||
## **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 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 SIOVs. Use SIOVs only in normal atmospheric conditions. Avoid use in deoxidizing gases (chlorine gas, hydrogen sulfide gas, ammonia gas, sulfuric acid gas etc), corrosive agents, humid or salty conditions.Contact with any liquids and solvents should be prevented.
## **Display of ordering codes for TDK Electronics products**
The ordering code for one and the same product can be represented differently in data sheets, data books, other publications, on the company website, or in order-related documents such as shipping notes, order confirmations and product labels. **The varying representations of the ordering codes are due to different processes employed and do not affect the specifications of the respective products** . Detailed information can be found on the Internet under www.tdk-electronics.tdk.com/orderingcodes.
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 11 of 14
**Housed varistors T14 series ThermoFuse varistors**
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## **Symbols and terms**
|**Symbols and**|**terms**|
|---|---|
|Symbol|Term|
|C
Ctyp
i
ic
Ileak
imax
Imax
In
LCT
Ltyp
Pmax
Rins
Rmin
TA
tr
UCT
v
Vclamp
vc, max
VDC
Vjump
vmax
Vop
VRMS
VRMS, op, max
Vsurge
VV
∆VV
WLD
Wmax|Capacitance
Typical capacitance
Current
Current at which Vc, maxis measured
Leakage current
Maximum surge current (also termed peak current)
Maximum discharge current
Nominal discharge current to UL 1449
Lower category temperature
Typical inductance
Maximum average power dissipation
Insulation resistance
Minimum resistance
Ambient temperature
Duration of equivalent rectangular wave
Upper category temperature
Voltage
Clamping voltage
Maximum clamping voltage at specified current ic
DC operating voltage
Maximum jump start voltage
Maximum voltage
Operating voltage
AC operating voltage, root-mean-square value
Root-mean-square value of max. DC operating voltage incl. ripple current
Super imposed surge voltage
Varistor voltage
Tolerance of varistor voltage
Maximum load dump
Maximum energy absorption
Lead spacing|
All dimensions are given in mm.
The commas used in numerical values denote decimal points.
Please read _Cautions and warnings_ and _Important notes_ at the end of this document.
Page 12 of 14
## **Important notes**
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 bindin g statements about the suitability of our products for a particular customer application** . As a rule we are 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 a 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 th e 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 th is publication may contain substances subject to restrictions in certain jurisdiction s (e.g. because they are classed as hazardous)** . Useful information on this will be found in our Material Data Sheets on the Internet (www.tdk-electronics.tdk.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 th is 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 our General Terms and Conditions of Supply** .
Page 13 of 14
**==> picture [347 x 57] intentionally omitted <==**
7. **Our manufacturing sites serving the automotive business apply the IATF 16949 standard** . The IATF certifications confirm our compliance with requirements regarding the quality management system in the automotive industry. Referring to customer requirements and customer specific requirements (“CSR”) TDK always has and will continue to have the policy of respecting individual agreements. Even if IATF 16949 may appear to support the acceptance of unilateral requirements, we hereby like to emphasize that **only requirements mutually agreed upon can and will be implemented in our Quality Management System** . For clarification purposes we like to point out that obligations from IATF 16949 shall only become legally binding if individually agreed upon.
8. The trade names EPCOS, CarXield, CeraCharge, CeraDiode, CeraLink, CeraPad, CeraPlas, CSMP, CTVS, DeltaCap, DigiSiMic, FilterCap, FormFit, InsuGate, LeaXield, MediPlas, MiniBlue, MiniCell, MKD, MKK, ModCap, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, PiezoBrush, PlasmaBrush, PowerHap, PQSine, PQvar, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV, SurfIND, ThermoFuse, WindCap, XieldCap are **trademarks registered or pending** in Europe and in other countries. Further information will be found on the Internet at www.tdk-electronics.tdk.com/trademarks.
Release 2024-02
Page 14 of 14
## Links
- [View this product on Novapart](https://novapart.co/products/B72214T2171K105/tvs-varistor-175-v-225-thermofuse-t-455-sip-metal)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/epcos/b72214t2171k105/varistor-transient-volt-455v-sip/dp/2456261)
---
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