# TVS Varistor, 420 V, G20 Series, 1.295 kV, Disc 20mm, Metal Oxide Varistor (MOV)

![Product image](https://novapart.co/image/farnell:4723112/)

**URL**: https://novapart.co/products/B72220G3421K101/tvs-varistor-420-v-g20-series-1295-kv-disc-20mm
**SKU**: B72220G3421K101
**Manufacturer**: TDK
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Varistors
**Price**: €0.8960
**Stock**: 200+
**Lead Time**: 169 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| Product Range | G20 Series |
| Varistor Type | Metal Oxide Varistor (MOV) |
| Voltage Rating Vac | 420V |
| Voltage Rating Vdc | - |
| Varistor Case Style | Disc 20mm |
| Clamping Voltage Vc Max | 1.295kV |
| Peak Energy (10/1000Us) | 330J |
| Operating Temperature Max | 105°C |
| Operating Temperature Min | -40°C |
| Peak Surge Current @ 8/20Μs | 10kA |
| Automotive Qualification Standard | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4723112/)

## **Metal Oxide Varistor** 

## G-series varistor 

|**Series/Type:**|**G20 series**|
|---|---|
|**Ordering code:**|**B72220G*K101**|
|Date:|2025-04-07|
|Version:|b|



 TDK Electronics AG 2025. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without TDK Electronics' prior express consent is prohibited. 

**B72220G*K101 G20 series** 

## **Metal Oxide Varistor G-series varistor** 

## **Applications** 

- Power supplies 

- Chargers 

- Surge protection devices 

- White goods 

- Communications 

## **Design** 

- Round varistor in series with arrester, leaded 

- Coating: epoxy, flame-retardant according to UL 94 V-0 

- Terminals: tinned copper wire, metal compound wire 

## **Features** 

- Hybrid design 

- Low leakage 

## **General technical data** 

|Climatic categoryto IEC 60068-1|40 / 105 / 56|
|---|---|
|Operatingtemperature|–40 … +105 °C|
|Storage temperature|–40 … +105 °C|
|Coatingmaterial|UL94-V0|
|Application altitude|< 2000 m|



## **Nomenclature** 

G = Disk type with gas tube 20 = Rated disk diameter (mm) K = Tolerance of VV at 1 mA: ±10% 50…750 = Max. operating AC voltage E3 = Energy absorption characteristics, AdvanceD series K4 = 2-pin version 

## **Dimensional drawing in mm** 

## **G20K…K4** 

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Page 2 of 11 

**B72220G*K101 G20 series** 

## **Metal Oxide Varistor G-series varistor** 

## **G20K…E3K4** 

> 1) Seating plane in accordance with IEC 60717 

|**Type**|**hmax**<br>**(mm)**|**wmax**<br>**(mm)**|**Lmin**<br>**(mm)**|**LHmax**<br>**(mm)**|**Ød ±0.05**<br>**(mm)**|**e ±1**<br>**(mm)**|**a (typical)**<br>**(mm)**|**thmax**<br>**(mm)**|
|---|---|---|---|---|---|---|---|---|
|G20K50K4|27|22.5|25|4|1|10|5.0|9.0|
|G20K65K4|27|22.5|25|4|1|10|5.0|9.0|
|G20K95K4|27|22.5|25|4|1|10|4.1|8.0|
|G20K115K4|27|22.5|25|4|1|10|4.3|8.5|
|G20K130E3K4|27|22.5|25|4|1|10|4.0|8.5|
|G20K140E3K4|27|22.5|25|4|1|10|4.0|8.5|
|G20K150E3K4|27|22.5|25|4|1|10|4.0|8.5|
|G20K175E3K4|27|22.5|25|4|1|10|4.2|8.5|
|G20K210E3K4|27|22.5|25|4|1|10|4.4|9.0|
|G20K230E3K4|27|22.5|25|4|1|10|4.4|9.0|
|G20K250E3K4|27|22.5|25|4|1|10|4.6|9.0|
|G20K275E3K4|27|22.5|25|4|1|10|4.6|9.0|
|G20K300E3K4|27|22.5|25|4|1|10|5.0|9.5|
|G20K320E3K4|27|22.5|25|4|1|10|5.0|9.5|
|G20K350E3K4|27|22.5|25|4|1|10|7.0|11.5|
|G20K385E3K4|27|22.5|25|4|1|10|7.3|11.5|
|G20K420E3K4|27|22.5|25|4|1|10|7.5|12.0|
|G20K460E3K4|27|22.5|25|4|1|10|8.0|12.5|
|G20K510E3K4|27|22.5|25|4|1|10|8.3|12.5|
|G20K550E3K4|27|22.5|25|4|1|10|8.7|13.0|
|G20K625E3K4|27|22.5|25|4|1|10|9.0|13.5|
|G20K680E3K4|27|22.5|25|4|1|10|9.4|14.0|
|G20K750E3K4|27|22.5|25|4|1|10|9.9|14.5|



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**Metal Oxide Varistor G-series varistor** 

**B72220G*K101 G20 series** 

## **Electrical data** 

|Type|Ordering code2)|TA = 105 °C<br>~~**e**eee~~|TA = 105 °C<br>~~**e**eee~~|TA = 105 °C<br>~~**e**eee~~|
|---|---|---|---|---|
|||Max. operating<br>voltage<br>~~**e**e~~|MOV voltage<br>~~ee~~|DC spark-over<br>voltage of GDT|
|||VRMS<br>~~**e**e ~~<br>~~s~~|1 mA<br> ~~ee~~<br>~~s~~|100 V/s|
|SIOV||V<br>~~s~~<br>~~ee~~|V<br>~~s~~<br>~~ee~~|V|
|G20K50K4|B72220G0500K101*<br>~~a~~|50|68(61 ~ 75)|300(240 ... 360)|
|G20K65K4|B72220G0650K101*<br>~~Ge~~|65<br>~~Ge~~|68(61 ~ 75)<br>~~Ge~~|300(240 ... 360)|
|G20K95K4|B72220G0950K101*<br>~~es~~|95<br>~~es~~|120(108 ~ 132)<br>~~es~~|470(376 ... 564)|
|G20K115K4|B72220G0111K101*<br>~~es~~<br>~~es~~|115<br>~~es~~<br>~~es~~|150(135 ~ 165)<br>~~es~~<br>~~es~~|600(480 ... 720)|
|G20K130E3K4|B72220G3131K101*<br>~~es~~<br>~~a~~|130<br>~~es~~|150(135 ~ 165)<br>~~es~~|600(480 ... 720)|
|G20K140E3K4|B72220G3141K101*<br>~~a~~<br>~~ee~~|140<br>~~ee~~|150(135 ~ 165)<br>~~ee~~|600(480 ... 720)|
|G20K150E3K4|B72220G3151K101*<br>~~ee~~<br>~~es~~|150<br>~~ee~~<br>~~es~~|180(162 ~ 198)<br>~~ee~~<br>~~es~~|600(480 ... 720)|
|G20K175E3K4|B72220G3171K101*<br>~~es~~<br>~~ee~~|175<br>~~es~~<br>~~ee~~|205(184 ~ 226)<br>~~es~~<br>~~ee~~|600(480 ... 720)|
|G20K210E3K4|B72220G3211K101*<br>~~ee~~<br>~~Ge~~|210<br>~~ee~~<br>~~Ge~~|240(216 ~ 264)<br>~~ee~~<br>~~Ge~~|600(480 ... 720)|
|G20K230E3K4|B72220G3231K101*<br>~~Ge~~|230<br>~~Ge~~|270(243 ~ 297)<br>~~Ge~~|1000(800 ... 1200)|
|G20K250E3K4|B72220G3251K101*<br>~~Ge~~|250<br>~~Ge~~|330(297 ~ 363)<br>~~Ge~~|1000(800 ... 1200)|
|G20K275E3K4|B72220G3271K101*<br>~~Ge~~|275<br>~~Ge~~|330(297 ~ 363)<br>~~Ge~~|1000(800 ... 1200)|
|G20K300E3K4|B72220G3301K101*<br>~~Ge~~|300<br>~~Ge~~|360(324 ~ 396)<br>~~Ge~~|1000(800 ... 1200)|
|G20K320E3K4|B72220G3321K101*<br>~~Ge~~|320<br>~~Ge~~|360(324 ~ 396)<br>~~Ge~~|1000(800 ... 1200)|
|G20K350E3K4|B72220G3351K101*<br>~~es~~|350<br>~~es~~|390(351 ~ 429)<br>~~es~~|1200(960 ... 1440)|
|G20K385E3K4|B72220G3381K101*<br>~~es~~<br>~~a~~|385<br>~~es~~|470(423 ~ 517)<br>~~es~~|1200(960 ... 1440)|
|G20K420E3K4|B72220G3421K101*<br>~~a~~|420|510(459 ~ 561)|1600(1280 ... 1920)|
|G20K460E3K4|B72220G3461K101*<br>~~a~~|460|560(504 ~ 616)|1600(1280 ... 1920)|
|G20K510E3K4|B72220G3511K101*<br>~~a~~|510|620(558~ 682)|2000(1600 ... 2400)|
|G20K550E3K4|B72220G3551K101*<br>~~a~~|550|680(612 ~ 748)|2000(1600 ... 2400)|
|G20K625E3K4|B72220G3621K101*<br>~~Ge~~|625<br>~~Ge~~|750(675 ~ 825)<br>~~Ge~~|2000(1600 ... 2400)|
|G20K680E3K4|B72220G3681K101*<br>~~Ge~~|680<br>~~Ge~~|820(738 ~ 902)<br>~~Ge~~|2000(1600 ... 2400)|
|G20K750E3K4|B72220G3751K101*<br>~~ee~~|750<br>~~ee~~|910(819 ~ 1001)<br>~~ee~~|2000(1600 ... 2400)|



* suffix 

2) Example: suffix -V87 stands for CCS wire for leads 

2025-04-07 

PPD VAR PD 

Please read _Cautions and warnings_ and _Important notes_ at the end of this document. 

Page 4 of 11 

~~Lo~~ **Metal Oxide Varistor B72220G*K101 G-series varistor G20 series** 

## **Electrical data** 

|Type|Ordering code2)<br>~~—~~|TA = 25 °C<br>~~eeDG~~|TA = 25 °C<br>~~eeDG~~|TA = 25 °C<br>~~eeDG~~|TA = 25 °C<br>~~eeDG~~|TA = 25 °C<br>~~eeDG~~|TA = 25 °C<br>~~eeDG~~|
|---|---|---|---|---|---|---|---|
|||In<br>~~ee~~|Imax<br>~~DG~~|Front of wave spark-<br>over voltage<br>(typical)<br>~~DG~~|Clamping votage<br>of MOV<br>（Max）<br>~~DG~~|Wmax<br>~~DG~~|Pmax|
|||8/20µs3)<br>~~ee~~|8/20µs<br>~~DG~~|at 1.2/50μs,6 kV<br>~~DG~~|at 3 kA<br>~~DG~~|2 ms<br>~~DG~~||
|SIOV||kA<br>~~ee~~|kA<br>~~DG~~<br>~~Ge~~|V<br>~~DG~~<br>~~Ge~~|V<br>~~DG~~|J<br>~~DG~~|W|
|G20K50K4|B72220G0500K101*<br>~~—~~<br>~~eG~~|1<br>~~ee~~<br>~~eG~~|2<br>~~DG~~<br>~~eG~~<br>~~Ge~~|1300<br>~~DG~~<br>~~eG~~<br>~~Ge~~|405<br>~~DG~~<br>~~eG~~|37<br>~~DG~~<br>~~eG~~|0.2|
|G20K65K4|B72220G0650K101*<br>~~eG~~<br>~~ee~~|1<br>~~eG~~<br>~~ee~~<br>~~Gs~~|2<br>~~eG~~<br>~~Ge~~<br>~~ee~~<br>~~Gs~~|1300<br>~~eG~~<br>~~Ge~~<br>~~ee~~<br>~~GR~~|405<br>~~eG~~<br>~~ee~~|37<br>~~eG~~<br>~~ee~~|0.2|
|G20K95K4|B72220G0950K101*<br>~~ee~~<br>~~rs~~|3<br>~~ee~~<br>~~rs~~<br>~~Gs~~|6.5<br>~~ee~~<br>~~rs~~<br>~~Gs~~|1500<br>~~ee~~<br>~~rs~~<br>~~GR~~|355<br>~~ee~~<br>~~rs~~|40<br>~~ee~~<br>~~rs~~|1|
|G20K115K4|B72220G0111K101*<br>~~ss~~|3<br>~~Gs~~<br>~~ss ~~|10<br>~~Gs~~<br> ~~QO~~|1700<br>~~GR~~<br>~~QO~~|450|50|1|
|G20K130E3K4<br>~~PO~~|B72220G3131K101*<br>~~ss~~<br>~~PO~~|5<br>~~ss ~~|10<br> ~~QO~~|1700<br>~~QO~~|450|50|1|
|G20K140E3K4<br>~~PO~~|B72220G3141K101*<br>~~PO~~|5|10|1700|450|50|1|
|G20K150E3K4<br>~~PO~~|B72220G3151K101*<br>~~PO~~<br>~~ee~~|5<br>~~ee~~<br>~~Gs~~|10<br>~~ee~~<br>~~Gs~~|1700<br>~~ee~~<br>~~GR~~|485<br>~~ee~~|60<br>~~ee~~|1|
|G20K175E3K4|B72220G3171K101*<br>~~ee~~<br>~~rs~~|5<br>~~ee~~<br>~~rs~~<br>~~Gs~~|10<br>~~ee~~<br>~~rs~~<br>~~Gs~~|1700<br>~~ee~~<br>~~rs~~<br>~~GR~~|530<br>~~ee~~<br>~~rs~~|135<br>~~ee~~<br>~~rs~~|1|
|G20K210E3K4|B72220G3211K101*<br>~~ss~~|5<br>~~Gs~~<br>~~ss ~~|10<br>~~Gs~~<br> ~~QO~~|1700<br>~~GR~~<br>~~QO~~|610|155|1|
|G20K230E3K4<br>~~PO~~|B72220G3231K101*<br>~~ss~~<br>~~PO~~|5<br>~~ss ~~|10<br> ~~QO~~|2200<br>~~QO~~|690|180|1|
|G20K250E3K4<br>~~PO~~|B72220G3251K101*<br>~~PO~~|5|10|2200|820|215|1|
|G20K275E3K4<br>~~PO~~|B72220G3271K101*<br>~~PO~~<br>~~ee~~|5<br>~~ee~~<br>~~Gs~~|10<br>~~ee~~<br>~~Gs~~|2200<br>~~ee~~<br>~~QO~~|820<br>~~ee~~|215<br>~~ee~~|1|
|G20K300E3K4|B72220G3301K101*<br>~~ee~~<br>~~rs~~|5<br>~~ee~~<br>~~rs~~<br>~~Gs~~|10<br>~~ee~~<br>~~rs~~<br>~~Gs~~|2200<br>~~ee~~<br>~~rs~~<br>~~QO~~|890<br>~~ee~~<br>~~rs~~|235<br>~~ee~~<br>~~rs~~|1|
|G20K320E3K4|B72220G3321K101*<br>~~ss~~|5<br>~~Gs~~<br>~~ss ~~|10<br>~~Gs~~<br> ~~QO~~|2200<br>~~QO~~<br>~~QO~~|890|235|1|
|G20K350E3K4|B72220G3351K101*<br>~~GG~~|5<br>~~GG~~|10<br>~~GG~~|2000<br>~~GG~~|1000<br>~~GG~~|255<br>~~GG~~|1|
|G20K385E3K4|B72220G3381K101*<br>~~GG~~<br>~~ee~~|5<br>~~GG~~<br>~~ee~~|10<br>~~GG~~<br>~~ee~~|2000<br>~~GG~~<br>~~ee~~|1185<br>~~GG~~<br>~~ee~~|305<br>~~GG~~<br>~~ee~~|1|
|G20K420E3K4|B72220G3421K101*<br>~~ee~~<br>~~ee~~|5<br>~~ee~~<br>~~ee~~<br>~~Gs~~|10<br>~~ee~~<br>~~ee~~<br>~~Gs~~|2500<br>~~ee~~<br>~~ee~~<br>~~QO~~|1295<br>~~ee~~<br>~~ee~~|330<br>~~ee~~<br>~~ee~~|1|
|G20K460E3K4|B72220G3461K101*<br>~~ee~~<br>~~rs~~|5<br>~~ee~~<br>~~rs~~<br>~~Gs~~|10<br>~~ee~~<br>~~rs~~<br>~~Gs~~|2500<br>~~ee~~<br>~~rs~~<br>~~QO~~|1440<br>~~ee~~<br>~~rs~~|335<br>~~ee~~<br>~~rs~~|1|
|G20K510E3K4|B72220G3511K101*<br>~~ss~~|5<br>~~Gs~~<br>~~ss ~~|10<br>~~Gs~~<br> ~~QO~~|2900<br>~~QO~~<br>~~QO~~|1600|370|1|
|G20K550E3K4|B72220G3551K101*<br>~~GG~~|5<br>~~GG~~|10<br>~~GG~~|2900<br>~~GG~~|1735<br>~~GG~~|405<br>~~GG~~|1|
|G20K625E3K4|B72220G3621K101*<br>~~ee~~|5<br>~~ee~~|10<br>~~ee~~|2900<br>~~ee~~|1875<br>~~ee~~|445<br>~~ee~~|1|
|G20K680E3K4|B72220G3681K101*<br>~~ee~~|5<br>~~ee~~|10<br>~~ee~~|2900<br>~~ee~~|1980<br>~~ee~~|445<br>~~ee~~|1|
|G20K750E3K4|B72220G3751K101*<br>~~ss~~|5<br>~~ss ~~|10<br> ~~Qe~~|2900<br>~~Qe~~|2190|490|1|



* suffix 

2) Example: suffix -V87 stands for CCS wire for leads 

3) Note: Nominal discharge current In according to UL1449. 

## **Typical oscilloscope waveform diagram at 1.2/50 μs, 6 kV** 

2025-04-07 

PPD VAR PD 

Please read _Cautions and warnings_ and _Important notes_ at the end of this document. 

Page 5 of 11 

**Metal Oxide Varistor** 

**B72220G*K101 G20 series** 

## **G-series varistor** 

## **Reliability data electrical** 

|**Characteristics**|**Test methods/description**|**Specifications**|
|---|---|---|
|Clamping voltage|The maximum voltage between two terminals with the specified<br>standard impulse current (8/20 µs) illustrated below applied.<br>Peak<br>%<br>100} ~----~--peq--<br>go+-------7<br>i<br>Leading<br>i<br>Ege<br>TrailingEdge<br>50¢-----<br>;<br>01<br>.<br>I<br>~—<br>i<br>,<br>Ts<br>Rise Time ps<br>Tr<br>Decay time to halfvalue us<br>©,<br>Nominal start<br>In<br>Peak value|To meet the<br>specified<br>value.<br>It tested<br>between pin1<br>and pin2, but<br>spark-<br>overvoltage of<br>surge arrester<br>is not included.|
|Surge current<br>derating,<br>8/20 µs|10 surge currents (8/20 µs), unipolar, interval 30 s, amplitude<br>corresponding to derating curve for 10 impulses at 20 µs|No visibile<br>damage|
|Electric strength|IEC 61051-1, test 4.9.2<br>Metal balls method, 2500 VRMS, 60 s<br>The varistor is placed in a container holding 1.6±0.2 mm diameter<br>metal balls such that only the terminations of the varistor are<br>protruding.<br>The specified voltage shall be applied between both terminals of the<br>specimen connected together and the electrode inserted between the<br>metal balls.|No breakdown|



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Page 6 of 11 

**Metal Oxide Varistor** 

**B72220G*K101 G20 series** 

## **G-series varistor** 

## **Reliability data mechanical** 

|**Characteristics**|**Test methods/description**|**Specifications**|
|---|---|---|
|Solderability|IEC 60068-2-20, test Ta, method 1 with<br>modified conditions for lead-free solder<br>alloys: 245 °C, 3 s:<br>After dipping the terminals to a depth of<br>approximately 3 mm from the body in a<br>soldering bath of 245 °C for 3 s, the<br>terminals shall be visually examined.|The inspection shall be carried out<br>under adequate light with normal<br>eyesight or with the assistance of a<br>magnifier capable of giving a<br>magnification of 4 to 10 times. The<br>dipped surface shall be covered with<br>a smooth and bright solder coating<br>with no more than small amounts of<br>scattered imperfections such as<br>pinholes or unwetted or wetted<br>areas. These imperfections shall not<br>be concentrated in one area.|
|Resistance to<br>soldering heat|IEC 60068-2-20, test Tb, method 1A,<br>260 °C, 10 s:<br>Each lead shall be dipped into a solder<br>bath having a temperature of 260±5 °C<br>to a point 2.0 to 2.5 mm from the body of<br>the unit, be held there for 10±1 s and<br>then be stored at room temperature and<br>normal humidity for 1 to 2 h. The part<br>shall be visually examined.|No visible damage|



## **Reliability data environmental** 

|**Characteristics**|**Test methods/description**|**Specifications**|
|---|---|---|
|Endurance at upper<br>category temperature|IEC61051-2-2, 1000 h at UCT<br>After having continuously applied the maximum allowable<br>voltage at UCT ±2 °C for 1000 h, the specimen shall be<br>stored at room temperature and normal humidity<br>for 1 to 2 h.|No visible<br>damage|
|Damp heat, steady state|IEC 60068-2-78, test Ca<br>The specimen shall be subjected to 40±2 °C, 90 to 95%<br>RH for 56 days without load / with 10% of the maximum<br>continuous DC operating voltage VDC. Then stored at room<br>temperature and normal humidity for 1 to 2 h.<br>Thereafter, insulation resistance Rinsshall be measured at<br>V = 500 V (insulated varistors only).|No visible<br>damage<br>Rins≥ 100 MΩ|



## **Note:** 

UCT = Upper category temperature LCT = Lower category temperature Rins = Insulation resistance 

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Page 7 of 11 

**Metal Oxide Varistor G-series varistor** 

**B72220G*K101 G20 series** 

## **Cautions and warnings** 

## **General** 

1. TDK Electronics 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** 

After shipment from TDK Electronics the SIOV type series should be soldered within the following time periods: 

SIOV-S,-Q,L(S),-SNF,-ICL,-B,-E 24 months SIOV-ETFV,-T,-SMD,-MT-EM,-NT,-G,-GNF 12 months SIOV-D 6 months SIOV-D(Cu) 3 months 

The parts are to be left in the original packing to prevent oxidized terminals which can cause soldering problems. 

Storage temperature: –25 to 45 °C Max. relative humidity (without condensation): < 75% annual average, < 95% on max. 30 days per annum 

## **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. Temperature of all preheat stages and the solder bath must be strictly controlled especially for T series (T14 and T20). 

## **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. 

2025-04-07 

PPD VAR PD 

Please read _Cautions and warnings_ and _Important notes_ at the end of this document. 

Page 8 of 11 

**Metal Oxide Varistor G-series varistor** 

**B72220G*K101 G20 series** 

## **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 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. 

This listing does not claim to be complete, but merely reflects the experience of TDK Electronics. 

## **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 at www.tdk-electronics.tdk.com/orderingcodes. 

2025-04-07 

PPD VAR PD 

Please read _Cautions and warnings_ and _Important notes_ at the end of this document. 

Page 9 of 11 

## **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 binding 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 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 lifesaving 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.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 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 our General Terms and Conditions of Supply.** 

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. 

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**Important notes** 

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 11 of 11 



## Links

- [View this product on Novapart](https://novapart.co/products/B72220G3421K101/tvs-varistor-420-v-g20-series-1295-kv-disc-20mm)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/epcos/b72220g3421k101/varistor-mov-1-295kv-disc-20mm/dp/4723112)
---

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