# TVS Varistor, 510 V, 670 V, ZNR C, 1.355 kV, Disc 36mm, Zinc Oxide Non-Linear Resistor (ZNR)

![Product image](https://novapart.co/image/farnell:3344128/)

**URL**: https://novapart.co/products/ERZC32CK821W/tvs-varistor-510-v-670-znr-c-1355-kv-disc-36mm
**SKU**: ERZC32CK821W
**Manufacturer**: PANASONIC
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Varistors
**Price**: €14.0400
**Stock**: 10+
**Lead Time**: 189 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| Product Range | ZNR C |
| Varistor Type | Zinc Oxide Non-Linear Resistor (ZNR) |
| Voltage Rating Vac | 510V |
| Voltage Rating Vdc | 670V |
| Varistor Case Style | Disc 36mm |
| Clamping Voltage Vc Max | 1.355kV |
| Peak Energy (10/1000Us) | - |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -40°C |
| Peak Surge Current @ 8/20Μs | 25kA |
| Automotive Qualification Standard | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3344128/)

**“ZNR” Transient/Surge Absorbers (Type CK)** 

## **UL and CSA Recognized “ZNR” Transient/Surge Absorbers with Tabs** 

## Type : **CK** 

ZNR Transient/Surge Absorber with Tabs is a heavy duty type ZNR with very unique tab terminals which bring forth a higher reliability. 

These tabs are used as electrical connecting terminals and also its mounting legs. This type of ZNR is meant for applications in power supplies or transient voltage surge suppressor units where large surge current or high surge energy absorption is required. 

## ee **Features** 

- UL and CSA recognized components 

- High energy handling capability (210 to 750 joules) 

- Large withstanding peak current (25 to 30 kA, 8/20 µs, 1 time) 

- Common terminals for electrical connection and mounting 

- RoHS compliant 

## ee **Recommended  Applications** 

- Power suppliers for OA, FA, telecommunication or industrial equipment 

- Power strips 

- Transient voltage surge suppressor units 

Note : Ask our factory for Product Specification before use. 

## ■ **As for Handling Precautions and Minimum Quantity / Packing Unit** 

- Please see Related Information 

|Standard No.|UL1449|CSA C22.2 No.269.5|
|---|---|---|
|Title|Surge Protective Devices|Accessories and Parts for Electronic Products<br>(Varistor for Across-The-Line use as transient<br>protection on 120V ac nominal system)|



- Each type designation is not registered by Part Num ber. Please contact us for further questions regarding type designation. 

**==> picture [452 x 89] intentionally omitted <==**

**----- Start of picture text -----**<br>
ee Explanation of Part Numbers<br>1 2 3 4 5 6 7 8 9 10 11 12<br>E R Z C C K<br>BMUUU UUUO U UU O U<br>Product Code Series Element Size Type Tolerance Nominal Design No.<br>Varistor Voltage<br>**----- End of picture text -----**<br>


Design and specifications are each subject to change without notice.  Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 

**“ZNR” Transient/Surge Absorbers (Type CK)** 

## **Ratings and Characteristics** 

- Operating Temperature Range : –40 to 85 °C ● Storage Temperature Range : –40 to 125 °C 

**==> picture [491 x 61] intentionally omitted <==**

**----- Start of picture text -----**<br>
Maximum<br>Varistor Maximum Maximum Energy Peak Current<br> Part No.  Type Designation Voltage Allowable Clamping (2 ms, (8/20 µs)<br> (UL/CSA Recognized) Voltage Voltage 1 time)<br>1 time 2 times<br>V1 mA (V) ACrms (V) DC (V) VXA (V) Ip (A) (J) (kA) (kA)<br>ERZC32CK201W 32K201U 200 (185 to  225) 130 170 340 200 210 25 20<br>**----- End of picture text -----**<br>


|Part No.<br>(UL/CSA Recognized)|Type Designation|Varistor<br>Voltage|Maximum<br>Allowable<br>Voltage|Maximum<br>Allowable<br>Voltage|Maximum<br>Clamping<br>Voltage|Maximum<br>Clamping<br>Voltage|Energy<br>(2 ms,<br>1 time)|Maximum<br>Peak Current<br>(8/20µs)|Maximum<br>Peak Current<br>(8/20µs)|
|---|---|---|---|---|---|---|---|---|---|
|||||||||1 time|2 times|
|||V1 mA (V)|ACrms(V)|DC(V)|VXA (V)|Ip (A)|(J)|(kA)|(kA)|
|ERZC32CK201W|32K201U|200(185 to  225)|130|170|340|200|210|25|20|
|ERZC32CK241W|32K241U|240(216 to  264)|150|200|395|200|240|25|20|
|ERZC32CK271W|32K271U|270(247 to  303)|175|225|455|200|255|25|20|
|ERZC32CK361W|32K361U|360(324 to  396)|230|300|595|200|325|25|20|
|ERZC32CK391W|32K391U|390(351 to  429)|250|320|650|200|350|25|20|
|ERZC32CK431W|32K431U|430(387 to  473)|275|350|710|200|400|25|20|
|ERZC32CK471W|32K471U|470(423 to  517)|300|385|775|200|405|25|20|
|ERZC32CK511W|32K511U|510(459 to  561)|320|415|845|200|405|25|20|
|ERZC32CK621W|32K621U|620(558 to  682)|385|505|1025|200|415|25|20|
|ERZC32CK681W|32K681U|680(612 to  748)|420|560|1120|200|450|25|20|
|ERZC32CK751W|32K751U|750(645 to  825)|460|615|1240|200|500|25|20|
|ERZC32CK781W|32K781U|780(702 to  858)|485|640|1290|200|520|25|20|
|ERZC32CK821W|32K821U|820(738 to  902)|510|670|1355|200|545|25|20|
|ERZC32CK911W|32K911U|910(819 to 1001)|550|745|1500|200|600|25|20|
|ERZC32CK951W|32K951U|950 (855 to 1045)|575|765|1570|200|600|25|20|
|ERZC40CK201W|40K201U|200(185 to  225)|130|170|340|250|260|30|25|
|ERZC40CK241W|40K241U|240(216 to  264)|150|200|395|250|300|30|25|
|ERZC40CK271W|40K271U|270(247 to  303)|175|225|455|250|340|30|25|
|ERZC40CK361W|40K361U|360(324 to  396)|230|300|595|250|405|30|25|
|ERZC40CK391W|40K391U|390(351 to  429)|250|320|650|250|435|30|25|
|ERZC40CK431W|40K431U|430(387 to  473)|275|350|710|250|500|30|25|
|ERZC40CK471W|40K471U|470(423 to  517)|300|385|775|250|505|30|25|
|ERZC40CK511W|40K511U|510(459 to  561)|320|415|845|250|505|30|25|
|ERZC40CK621W|40K621U|620(558 to  682)|385|505|1025|250|515|30|25|
|ERZC40CK681W|40K681U|680(612 to  748)|420|560|1120|250|560|30|25|
|ERZC40CK751W|40K751U|750(645 to  825)|460|615|1240|250|625|30|25|
|ERZC40CK781W|40K781U|780(702 to  858)|485|640|1290|250|650|30|25|
|ERZC40CK821W|40K821U|820(738 to  902)|510|670|1355|250|680|30|25|
|ERZC40CK911W|40K911U|910(819 to 1001)|550|745|1500|250|750|30|25|
|ERZC40CK951W|40K951U|950 (855 to 1045)|575|765|1570|250|750|30|25|



## **Dimensions in mm (not to scale)** 

**==> picture [488 x 291] intentionally omitted <==**

**----- Start of picture text -----**<br>
Part No.<br>Type Designation D max. H max. T max. d<br>(UL/CSA Recognized)<br>ERZC32CK201W 32K201U  7.5 5.7±1.0<br>ZNR ERZC32CK241W 32K241U  7.5 5.4±1.0<br>Abbreviation of Part No.  T ERZC32CK271W 32K271U  8.5 5.2±1.0<br>Date code ERZC32CK361W 32K361U  9.0 4.6±1.0<br>ERZC32CK391W 32K391U  9.0 4.4±1.0<br>ERZC32CK431W 32K431U  9.0 4.1±1.0<br>ERZC32CK471W 32K471U  9.7 3.9±1.0<br>ERZC32CK511W 32K511U 36 46  9.7 4.5±1.0<br>ERZC32CK621W 32K621U  9.7 3.9±1.0<br>ERZC32CK681W 32K681U  9.7 3.6±1.0<br>ERZC32CK751W 32K751U 10.5 3.3±1.0<br>ERZC32CK781W 32K781U 10.5 3.1±1.0<br>ERZC32CK821W 32K821U 10.5 2.9±1.0<br>ERZC32CK911W 32K911U 11.5 2.5±1.0<br>ERZC32CK951W 32K951U 11.5 2.3±1.0<br>ERZC40CK201W 40K201U  7.5 5.7±1.0<br>ERZC40CK241W 40K241U  7.5 5.4±1.0<br>18<br>ERZC40CK271W 40K271U  8.5 5.2±1.0<br>25 ERZC40CK361W 40K361U  9.0 4.6±1.0<br>ERZC40CK391W 40K391U  9.0 4.4±1.0<br>D ERZC40CK431W 40K431U  9.0 4.1±1.0<br>7 7 ERZC40CK471W 40K471U  9.7 3.9±1.0<br>ERZC40CK511W 40K511U 44 55  9.7 4.5±1.0<br>ERZC40CK621W 40K621U  9.7 3.9±1.0<br>ERZC40CK681W 40K681U  9.7 3.6±1.0<br>ERZC40CK751W 40K751U 10.5 3.3±1.0<br>2-f 3.4 ERZC40CK781W 40K781U 10.5 3.1±1.0<br>ERZC40CK821W 40K821U 10.5 2.9±1.0<br>ERZC40CK911W 40K911U 11.5 2.5±1.0<br>ERZC40CK951W 40K951U 11.5 2.3±1.0<br>H<br>d<br>8<br>**----- End of picture text -----**<br>


Design and specifications are each subject to change without notice.  Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 

04 Nov. 2018 

**“ZNR” Transient/Surge Absorbers (Type CK)** 

## **Typical Characteristics** 

**Voltage vs. Current** (ERZC32CK201W to ERZC32CK951W) 

**==> picture [400 x 582] intentionally omitted <==**

**----- Start of picture text -----**<br>
6000<br>Max. Leakage Current Max. Clamping Voltage<br>ERZC32 CK951W<br>4000 ERZC32 CK911W<br>ERZC32 CK821W<br>ERZC32CK951W ERZC32 CK751W<br>ERZC32CK911W ERZC32CK681W<br>ERZC32CK821W ERZC32 CK621W<br>2000 ERZC32CK751WERZC32CK681W ERZC32 ERZC32 CK511WCK471W<br>ERZC32CK621W ERZC32 CK431W<br>ERZC32 CK391W<br>ERZC32CK511W ERZC32 CK361W<br>ERZC32CK471W<br>1000 ERZC32CK431WERZC32CK391W ERZC32CK271W<br>ERZC32CK361W ERZC32 CK241W<br>800 ERZC32CK201W<br>600<br>400<br>200<br>100<br>80 ERZC32CK271W ERZC32CK241W Test Current Waveform<br>ERZC32CK201W 10 [-][6]  to 10 [-][3 ] A: Direct Current<br>60 10 [-] [1 ] to 10 [4 ] A:  8/20 µs<br>10 [-6] 10 [-5] 10 [-4] 10 [-3] 10 [-2] 10 [-1] 10 [0] 10 [1] 10 [2] 10 [3] 10 [4] 10 [5]<br>Current (A)<br>(ERZC40CK201W to ERZC40CK951W)<br>6000<br>Max. Leakage Current Max. Clamping Voltage<br>4000 ERZC40C K951W<br>2000 ERZC40CK951WERZC40CK911WERZC40CK821WERZC40CK751WERZC40CK681W ERZC40CERZC40CERZC40CERZC40CERZC40C K911WK821WK751WK681WK621W<br>ERZC40CK621W ERZC40C K511W<br>1000 ERZC40CK511WERZC40CK471W ERZC40CK431WERZC40CK391W ERZC40CK361W ERZC40CERZC40CERZC40CERZC40CERZC40C K471WK431WK391WK361WK271W<br>800 ERZC40C K241W<br>ERZC40CK201W<br>600<br>400<br>200<br>100<br>80 ERZC40CK271WERZC40CK241WERZC40CK201W Test Current Waveform10 [-][6]  to 10 [-][3 ] A: Direct Current<br>60 10 [-] [1 ] to 10 [4 ] A:  8/20 µs<br>10 [-6] 10 [-5] 10 [-4] 10 [-3] 10 [-2] 10 [-1] 10 [0] 10 [1] 10 [2] 10 [3] 10 [4] 10 [5]<br>Current (A)<br>Voltage (V)<br>Voltage (V)<br>**----- End of picture text -----**<br>


Design and specifications are each subject to change without notice.  Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 

04 Nov. 2018 

**“ZNR” Transient/Surge Absorbers (Type CK)** 

## ~~hee~~ **UL,  CSA Rec og nized Components and The A.C. Rated Voltage** 

|Part No.<br>(UL/CSA Recognized)|Maximum Allowable Voltage<br>Pe|Maximum Allowable Voltage<br>Pe|Rated Voltage (Vrms)|Rated Voltage (Vrms)|
|---|---|---|---|---|
||ACrms (V)<br>~~ee~~|DC (V)<br>~~ee~~|UL1449<br>~~ee~~|CSA C22.2 No.269.5|
|ERZC32CK201W|130<br>a|170|118|118|
|ERZC32CK241W|150|200|136|136|
|ERZC32CK271W|175<br>~~TT~~|225<br>~~TT~~|159<br>~~TT~~|159|
|ERZC32CK361W|230<br>a|300<br>|209<br>|209|
|ERZC32CK391W|250<br>a|320<br>|227<br>|227|
|ERZC32CK431W|275<br>~~ee~~|350<br>~~ee~~|250<br>~~ee~~|250|
|ERZC32CK471W|300<br>~~ee~~<br>a|385<br>~~ee~~<br>|272<br>~~ee~~<br>|272|
|ERZC32CK511W|320<br>a~~ee~~|415<br>~~ee~~|291<br>~~ee~~|291|
|ERZC32CK621W|385<br>~~ee~~<br>~~a~~|505<br>~~ee~~<br>~~a~~|350<br>~~ee~~<br>~~a~~|350|
|ERZC32CK681W|420<br>~~a~~|560<br>~~a~~|381<br>~~a~~|381|
|ERZC32CK751W|460<br>~~a~~|615<br>~~a~~|418<br>~~a~~|418|
|ERZC32CK781W|485<br>~~ee~~|640<br>~~ee~~|440<br>~~ee~~|440|
|ERZC32CK821W|510<br>~~ee~~|670<br>~~ee~~|463<br>~~ee~~|463|
|ERZC32CK911W|550<br>~~ee~~|745<br>~~ee~~|500<br>~~ee~~|500|
|ERZC32CK951W|575<br>a|765|522|522|
|ERZC40CK201W|130|170|118|118|
|ERZC40CK241W|150<br>a|200|136|136|
|ERZC40CK271W|175<br>a|225|159|159|
|ERZC40CK361W|230<br>a|300|209|209|
|ERZC40CK391W|250<br>~~ee~~|320<br>~~ee~~|227<br>~~ee~~|227|
|ERZC40CK431W|275<br>a|350|250|250|
|ERZC40CK471W|300<br>~~ee~~|385<br>~~ee~~|272<br>~~ee~~|272|
|ERZC40CK511W|320|415|291|291|
|ERZC40CK621W|385<br>~~ee~~|505<br>~~ee~~|350<br>~~ee~~|350|
|ERZC40CK681W|420<br>a|560<br>|381<br>|381|
|ERZC40CK751W|460<br>~~ee~~|615<br>~~ee~~|418<br>~~ee~~|418|
|ERZC40CK781W|485<br>a|640|440|440|
|ERZC40CK821W|510<br>a|670|463|463|
|ERZC40CK911W|550<br>a|745|500|500|
|ERZC40CK951W|575<br>a|765|522|522|



Design and specifications are each subject to change without notice.  Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 

**“ZNR” Transient/Surge Absorbers (Type CK)** 

## **Performance Characteristics (Type CK)** 

|Characteristics|Characteristics|Characteristics|Test Methods/Description|Specifications|
|---|---|---|---|---|
|Standard Test Condition|||Electrical characteristics shall be measured at following conditions<br>(Temperature: 5 to 35 °C, Humidity: Max. 85 %).|———|
|Electrical|Varistor Voltage||The voltage between two terminals with the specified measuring<br>current 1mA DC applied is called V1or V1mA.  The measurement<br>shall be made as fast as possible to avoid heat affection.|To meet the<br>specified value.|
||Maximum Allowable<br>Voltage||The maximum sinusoidal wave voltage (rms) or the maximum DC<br>voltage that can be applied continuously.||
||Clamping Voltage||The maximum voltage between two terminals with the specified<br>standard impulse current (8/20 µs).||
||Rated Power||The maximum power that can be applied within the specified<br>ambient temperature.||
||Energy||The maximum energy within the varistor voltage change of ±10 %<br>when one impulse of 2 ms is applied.||
||Maximum<br>Peak<br>Current|2 times|The maximum current within the varistor voltage change of<br>±10 % with the standard impulse current (8/20 µs) applied<br>two times with an interval of 5 minutes.||
|||1 time|The maximum current within the varistor voltage change of ±10 %<br>with the standard impulse current (8/20 µs) applied one time.||
|Mechanical|Robustness of<br>Terminations<br>(Tensile)||After gradually applying the force of 19.6 N (2 kgf) and keeping<br>the unit f xed for ten seconds, the terminal shall be visually<br>examined for any damage.|No remarkable<br>damage|
||Vibration||After repeatedly applying a single harmonic vibration (amplitude:<br>0.35 mm): double amplitude: 0.7 mm with 1 minute vibration<br>frequency cycles (10 Hz to 55 Hz to 10 Hz) to each of three<br>perpendicular directions for 2 hours.  Thereafter, the unit shall be<br>visually examined.|No remarkable<br>damage|
||Solderability||After dipping the terminal to a depth of approximately 3 mm from<br>the body in a soldering bath of 230±5 °C for 5.0±0.5 seconds,<br>the terminal shall be visually examined.|Approximately 95 %<br>of the terminals shall<br>be covered with new<br>solder uniformly.|
||Resistance to<br>Soldering Heat||The terminal shall be dipped into a soldering bath having a<br>temperature of 350±10 °C to a point 4.0±0.8 mm from the body<br>of the unit and then be held there for 3.0±0.5 seconds.  The<br>change of Vc and mechanical damage shall be examined.|ΔV1mA/V1mA <± 5 %<br>No remarkable<br>damage|
|Environmental|Dry Heat/ High<br>Temperature<br>Storage||The specimen shall be subjected to 125±2 °C for 500 hours in a<br>thermostatic bath without load and then stored at room temperature<br>and humidity for one to two hours.  Thereafter, the change of Vc<br>shall be measured.|ΔV1mA/V1mA <± 5 %|
||Damp Heat/<br>Humidity<br>(Steady State)||The specimen shall be subjected to 40±2 °C, 90 to 95 %RH for<br>1000 hours without load and then stored at room temperature<br>and humidity for one to two hours.  Thereafter, the change of Vc<br>shall be measured.||
||Temperature Cycle||The temperature cycle shown below shall be repeated five<br>times and then stored at room temperature and humidity for<br>one to two hours.  The change of Vc and mechanical damage<br>shall be examined.<br>Step<br>Temperature (°C)<br>Period(minutes)<br>1<br>–25±3<br>30+3<br>2<br>Room Temp.<br>3 max.<br>3<br>85±2<br>30+3<br>4<br>Room Temp.<br>3 max.<br>0<br>0|ΔV1mA/V1mA <± 5 %<br>No remarkable<br>damage|
||Dry Heat Load/<br>High Temperature<br>Load||After being continuously applied the Maximum Allowable Voltage<br>at 85±2 °C for 500 hours, the specimen shall be stored at room<br>temperature and humidity  for one to two hours.  Thereafter, the<br>change of Vc shall be measured.|ΔV1mA/V1mA <± 10 %|



Design and specifications are each subject to change without notice.  Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 

04 Nov. 2018 

~~es~~ 

Guidelines and precautions regarding the technical information and use of our products described in this online catalog. 

m= If you want to use our products described in this online catalog for applications requiring special qualities or reliability, or for applications where the failure or malfunction of the products may directly jeopardize human life or potentially cause personal injury (e.g. aircraft and aerospace equipment, traffic and transportation equipment, combustion equipment, medical equipment, accident prevention, anti-crime equipment, and/or safety equipment), it is necessary to verify whether the specifications of our products fit to such applications. Please ensure that you will ask and check with our inquiry desk as to whether the specifications of our products fit to such applications use before you use our products. 

m The quality and performance of our products as described in this online catalog only apply to our products when used in isolation. Therefore, please ensure you evaluate and verify our products under the specific circumstances in which our products are assembled in your own products and in which our products will actually be used. 

m@ If you use our products in equipment that requires a high degree of reliability, regardless of the application, it is recommended that you set up protection circuits and redundancy circuits in order to ensure safety of your equipment. 

m The products and product specifications described in this online catalog are subject to change for improvement without prior notice. Therefore, please be sure to request and confirm the latest product specifications which explain the specifications of our products in detail, before you finalize the design of your applications, purchase, or use our products. 

m@ The technical information in this online catalog provides examples of our products' typical operations and application circuits. We do not guarantee the non-infringement of third party's intellectual property rights and we do not grant any license, right, or interest in our intellectual property. 

m@ If any of our products, product specifications and/or technical information in this online catalog is to be exported or provided to non-residents, the laws and regulations of the exporting country, especially with regard to security and export control, shall be observed. 

<Regarding the Certificate of Compliance with the EU RoHS Directive/REACH Regulations> 

m The switchover date for compliance with the RoHS Directive/REACH Regulations varies depending on the part number or series of our products. 

m When you use the inventory of our products for which it is unclear whether those products are compliant with the RoHS Directive/REACH Regulation, please select "Sales Inquiry" in the website inquiry form and contact us. 

We do not take any responsibility for the use of our products outside the scope of the specifications, descriptions, guidelines and precautions described in this online catalog. 

01-Apr-19 

**“ZNR” Transient/Surge Absorbers** 

## “ZNR” Transient/Surge Absorbers, Type E 

“ZNR” Transient/Surge Absorbers, Type CK, SC 

## ~~CT~~ **Handling Precautions** 

## Safety Precautions 

In case that a ZNR Surge Absorber (hereafter referred to as the ZNR, or product name) is used, if an abnormality takes place because of peripheral conditions of the ZNR(material, environments, power source conditions, circuit conditions, etc. in equipment design), fire, electric shock, burn, or product failure may be occur.  The precautions for this product are described below, understand the content thoroughly before usage. For more questions, contact us. 

If there's any uncertainty/doubt/products safety items, please contact us. When a dogma shall be occurred about safety for this products, be sure to inform us rapidly, operate your technical examination. 

## **1.     Operating Conditions precautions to be strictly observed** 

## **1.1 Confirmation of performance ratings** 

Use the ZNR within its rated range of performance such as the Max. allowable voltage, withstanding surge current, withstanding energy, impulse life(surge life), average pulse power, and operating temperature range. If used outside the range, the ZNR can be degrade and have element fracture, which may result in smoking and ignition. 

## **1.2 To avoid accidents due to unexpected phenomena, take the following measures** 

- 1)  Across-the-line use 

When the ZNR is used across a line, put a current fuse in series with the ZNR (Refer to Table 1). 

- 2) Use between line to ground 

   - (1)  If the case that the ZNR is used between a line to the ground, the short-circuit of the ZNR may not blow the current fuse because of grounding resistance, which may cause smoking and ignition of the ZNR’s exterior resin. 

As the measure against it, install an earth leakage breaker on the power supply side of the ZNR position. If no earth leakage breaker is installed, use a thermal fuse together wth a current fuse in series. (Refer to Table 1.) 

   - (2)  If the case that the ZNR is used between a live part to metal case, an electric shock may develop at a shortcircuit of the ZNR ; hence, ground the metal case to the ground or keep it from the human body. 

- 3) In the event of fracture of the ZNR, its pieces may scatter ; hence, put the case or cover of the set product in place. 

- 4) Do not install the ZNR near combustible substances(polyvinyl chloride wires, resin moldings, etc.). If it is difficult to do, install a nonflammable cover. 

## **1.3 The live part shall be equipped with a protective cover for preventing electric shock.** 

## **1.4 If ZNR is shorted out and happen smoke or ignition, please cut provided current to ZNR immediately.** 

|Series|ERZC20EK□□□|ERZC32□K□□□|ERZVS34C□□□|ERZC40CK□□□|
|---|---|---|---|---|
|Current Fuse<br>(Line - Line)|10 A max.|20 A max.|20 A max.|20 A max.|
|Thermal. Fuse<br>(Line - Ground)|100 to 120 °C  5 A<br>)|100 to 120 °C  10 A|100 to 120 °C  10 A|100 to 120 °C  10 A|



- Fuses shall use rated voltages ap pro pri ate for circuits. 

- Finally, confi rm that the secondary disaster does not occur even if the ZNR mounted on equipment breaks. 

- Set a thermal fuse to get high thermal conductivity with ZNR. 

## **2. Application notes** 

## **2.1  Pay attention to the following items to avoid the shortened life and failure of the ZNR** 

- 1)   Circuit conditions 

   - (1)  Select a ZNR of which the maximum voltage including fluctuations in source voltage allows for the maximum permissible circuit voltage. 

01. Oct. 2019 

**“ZNR” Transient/Surge Absorbers** 

- (2)  In cases that surges are intermittently applied at short intervals (for example, in the case that the voltage of the noise simulator test is impressed), do not cause them to exceed the ZNR's rated pulse power. 

- (3)  Select a ZNR recommended in Table 1. 

   - ①Across-the-Line Use 

Because the primary line voltage temporarily rises due to load unbalance of separately wired loads, short circuit between the live line and the neutral line or LC resonance at switching for a capacitate load, ZNR with * are recommended for AC100V or AC120V applications. 

      - ②Line to ground Use 

         - ・When DC500V insulation resistance test of the circuits employing ZNR is conducted, the ZNR shall be removed after getting approval from the customer, or the ZNR ** with the Maximum Allowable voltage exceeding to the test voltage shall be applied. 

         - ・When AC1000V dielectric with standing test is conducted, ZNR shall be removed after getting approval from the customer according to the relevant regulations, or the ZNR *** with the Maximum Allowable voltage exceeding to the test voltage shall be applied. 

- 2) Operating environments 

   - (1) The ZNR is designed and manufactured for application in general purpose electronic devices. The ZNR shall not be exposed to the weather, except for usage inside unit. 

   - (2) Do not use the ZNR in places exposed to temperatures beyond the operating temperature range, such as places exposed to sunlight and vicinities of heating equipment. 

   - (3) Do not use the ZNR in places exposed to high temperatures and high humidity, such as places exposed directly to rain, wind, dew condensation, and vapor. 

   - (4) Do not use the ZNR in dusty and salinity environment and atmospheres polluted by corrosive gases, in liquids such as water, oil, chemical, organic solvent. 

- 3) Processing conditions 

   - (1) Do not wash the ZNR by such solvents(thinner, acetone, etc.) as its exterior resin deteriorates. 

   - (2) Do not apply a strong vibration or shock (by falling, etc.) to the ZNR, cracking to its exterior resin and element may occur. 

   - (3) When coating the ZNR with resin(including molding), do not use such resin. 

   - (4) Do not bend the ZNR lead wires at the position close to its ZNR exterior resin, or apply external force to the position. 

   - (5) When soldering the ZNR lead wires, follow the recommended condition and do not melt the solder and insulating materials constituting the ZNR. 

   - (6) Keep the wiring of the ZNR as short and straight as possible. 

- 4)  Long-term storage 

   - (1) Do not store the ZNR under high temperature and high humidity.   Store it indoor environment at a temperature up to 40 °C and at humidity below 75 %RH, and use it within two years. 

   - Before using the ZNR that has been stored for a long period(two years or longer), confirm the solderability. (2) Avoid atmospheres full of corrosive gases (hydrogen sulfide, sulfurous acid, chlorine, ammonia, etc.). 

   - (3) Avoid direct sunlight and dew condensation. 

## **2.2 The recommended fuse position is shown in Table.1, "Example of ZNR application", however, if the load current of protected equipment is larger than that of the above recommended fuse rated current, install a current fuse at the position shown below.** 

**==> picture [323 x 84] intentionally omitted <==**

**----- Start of picture text -----**<br>
Current Fuse<br>Protected<br>Power Source Side<br>Equipment<br>ZNR<br>**----- End of picture text -----**<br>


01. Oct. 2019 

**“ZNR” Transient/Surge Absorbers** 

## **3.  Notices** 

- 3.1 In cases that the ZNR is used in equipment (aerospace equipment, medical equipment, etc.) requiring extremely high reliability, ask us for selection of part No., and protection coordination, etc. in advance. 

- 3.2 There is possibility that the ZNR will unexpectedly smoke or ignite because of abnormal rise of the circuit voltage and invasion of excessive surge.  To prevent that accident from spreading over the equipment and not to expand the damage, use multiplex protection such as the adoption of frame-retardant materials for housing parts and structural parts. 

- 3.3. We don’t bear any responsibility for product malfunction or abnormal conditions which caused by using beyond the descriptions in this product specification. 

- 3.4 Package marking includes the product number, quantity, and country of origin. As a rule, country of origin should be indicated in English. 

## **4. Applicable laws and regulations , others** 

- 4.1  This product not been manufactured with any ozone depleting chemical controlled under the Montreal Protocol. 

- 4.1  Specified brominated flame retardants (including PBB (polybromobiphenyl) and PBDE (polybromodiphenyl ether)) are not intentionally used in the components of this product. 

- 4.3  This product comply with RoHS(Restriction of the use of certain Hazardous Substance in electrical and electronic equipment) (DIRECTIVE 2011/65/EU and 2015/863/EU). 

- 4.4  All the materials used in this part are registered material under the Law Concerning the Examination and Regulationof Manufacture, etc. of Chemical Substance. 

- 4.5  If you need the notice by letter of  “A preliminary judgement on the Laws of Japan foreign exchange and Foreign Trade Control”, be sure to let us know. 

- 4.6  These products are not dangerous goods on the transportation as identified by UN(United nations) numbers or UN classification. 

## **5. Others** 

- 5.1  As to the disposal of ZNR, check the method of disposal in each country or origin where the ZNR are incorporated in your products to be used. 

- 5.2  The technical information in this specification provides example of our products’ typical operations and application circuit.  We do not guarantee the non-infringement of third party’s intellectual property rights and we do not grant any license, right or interest in our intellectual property. 

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**“ZNR” Transient/Surge Absorbers** 

|<br>**Connections example**|<br>Across-the-Line/Line toLine Protection|<br>Across-the-Line/Line toLine Protection|<br>Across-the-Line/Line toLine Protection|<br>Across-the-Line/Line toLine Protection|<br>Across-the-Line/Line toLine Protection|<br>Across-the-Line/Line toLine Protection|<br>Across-the-Line/Line toLine Protection|DC/AC<br>Single-phase<br>Line toLineandLine toGroundProtection<br>ZNR2<br>ZNR1<br>f<br>f : fuse<br>Protected<br>Equipmen<br>Thermal coupling<br>Thermal Fuse|DC/AC<br>Single-phase<br>Line toLineandLine toGroundProtection<br>ZNR2<br>ZNR1<br>f<br>f : fuse<br>Protected<br>Equipmen<br>Thermal coupling<br>Thermal Fuse|DC/AC<br>Single-phase<br>Line toLineandLine toGroundProtection<br>ZNR2<br>ZNR1<br>f<br>f : fuse<br>Protected<br>Equipmen<br>Thermal coupling<br>Thermal Fuse|DC/AC<br>Single-phase<br>Line toLineandLine toGroundProtection<br>ZNR2<br>ZNR1<br>f<br>f : fuse<br>Protected<br>Equipmen<br>Thermal coupling<br>Thermal Fuse|
|---|---|---|---|---|---|---|---|---|---|---|---|
||DC/AC<br>Single-phase|||f||ZNR1||||||
|||||||||||||
|||||||||||||
||AC 3-phase|||f||ZNR3<br>f : fuse<br>Protected<br>Equipmen||AC|3-phase<br>f|||
|||||||||||||
|||||||||||||
|||||||||||||
|||||||||||Thermal coupling||
|||||||||||||
|**Selection Examples**|||Across the Line Use/Line to Line|||||||Line to||
||ZNR||Nominal<br>Line Voltage||Part Number of ZNR|||ZNR||Nominal<br>Line Voltage||
||||||Type E,CK,SC|||||||
||ZNR 1<br>ZNR 3||AC 100 V||ERZC□□EK<br>ERZC□□CK<br>ERZVS34C||201<br>241<br>271|ZNR 2<br>ZNR 4||AC 100 V<br>～ AC 220 V|ERZC□□EK<br>ERZC□□CK<br>ERZVS34C|
||||AC 120 V||||241<br>271*|||||
||||AC 200 V<br>～ AC 220 V||||471|||AC 240 V||
||||AC 240 V||||511|||||



01. Oct. 2019 



## Links

- [View this product on Novapart](https://novapart.co/products/ERZC32CK821W/tvs-varistor-510-v-670-znr-c-1355-kv-disc-36mm)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/panasonic/erzc32ck821w/varistor-disc-znr-1355v/dp/3344128)
---

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