B32922C3683M189.

## **Film Capacitors** 

EMI Suppression Capacitors (MKP) 

**Series/Type: B32921C/D ... B32926C/D** Date: May 2009 

© EPCOS AG 2009. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited. 

**B32921C/D ... B32926C/D** 

**EMI suppression capacitors (MKP) X2 / 305 V AC** 

## **Typical applications** 

X2 class for interference suppression "Across the line" applications 

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## **Dimensional drawing** 

## **Climatic** 

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Max. operating temperature: 110 ° C Climatic category (IEC 60068-1): 40/105/56 

## **Construction** 

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Dielectric: polypropylene (MKP) Plastic case (UL 94 V-0) Epoxy resin sealing (UL 94 V-0) 

Dimensions in mm 

## **Features** 

Very small dimensions Self-healing properties 

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## **Terminals** 

Parallel wire leads, lead-free tinned Standard lead lengths: 6 �1 mm Special lead lengths available on request 

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## **Marking** 

Manufacturer's logo, lot number, date code, rated capacitance (coded), cap. tolerance (code letter), rated AC voltage, series number, sub-class (X2), dielectric code (MKP), climatic category, passive flammability category, approvals. 

## **Delivery mode** 

Bulk (untaped) Taped (Ammo pack or reel) For taping details, refer to chapter "Taping and packing" 

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**----- Start of picture text -----**<br>
Lead spacing Lead diameter Type<br>± 0.4 d1<br>10 0.6 B32921<br>15 0.8 B32922<br>22.5 0.8 B32923<br>27.5 0.8 B32924<br>37.5 1.0 B32926<br>Marking Examples<br>= 10 mm ≥ 15 mm/CR ≤ 1  µ F<br>= 22.5, 27.5,<br>37 mm/CR>1  µ F<br>**----- End of picture text -----**<br>


## **Approvals** 

|Approval marks|Standards<br>Cer|tificate|
|---|---|---|
||EN 60384-14, IEC 60384-14<br>400|10694|
||UL 1414 / UL 1283<br>E9|863 / E157153|
||<br> <br>CSA C222 No1 / No 8<br>E9|<br>863 / E157153(approved byUL)|
||. .  .<br> <br>CQC (GB/T 14472-1998)<br>CQ|<br>C06001015331 / CQC06001016454|



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

Page 2 of 18 

## **B32921C/D ... B32926C/D X2 / 305 V AC** 

## **Overview of available types** 

|Lead spacing|10 mm|15 mm|22.5 mm|27.5 mm|37.5 mm|
|---|---|---|---|---|---|
|Type|B32921|B32922|B32923|B32924|B32926|
|CR (µF)||||||
|0.010||||||
|0.022||||||
|0.033||||||
|0.047||||||
|0.068||||||
|0.10||||||
|0.15||||||
|0.22||||||
|0.33||||||
|0.47||||||
|0.68||||||
|1.0||||||
|1.5||||||
|2.2||||||
|3.3||||||
|4.7||||||
|6.8||||||
|10||||||



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

Page 3 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

**Ordering codes and packing units** 

|Lead spacing<br>mm|CR<br>µF|Max. dimensions<br>w×h×l<br>mm|Ordering code<br>(composition see<br>below)|Ammo<br>pack<br>pcs./MOQ|Reel<br>pcs./<br>MOQ|Untaped<br>pcs./<br>MOQ|
|---|---|---|---|---|---|---|
|10|0.010<br>0.022<br>0.033<br>0.047<br>0.068<br>0.10|4.0×<br>9.0×13.0<br>4.0×<br>9.0×13.0<br>4.0×<br>9.0×13.0<br>5.0×11.0×13.0<br>6.0×12.0×13.0<br>6.0×12.0×13.0|B32921C3103+***N<br>B32921C3223+***N<br>B32921C3333+***N<br>B32921C3473+***N<br>B32921C3683+***<br>B32921C3104M***|4000<br>4000<br>4000<br>3320<br>2720<br>2720|6800<br>6800<br>6800<br>5200<br>4400<br>4400|4000<br>4000<br>4000<br>4000<br>4000<br>4000|
|15|0.033<br>0.047<br>0.068<br>0.10<br>0.15<br>0.22<br>0.33<br>0.33<br>0.47<br>0.68|5.0×10.5×18.0<br>5.0×10.5×18.0<br>5.0×10.5×18.0<br>5.0×10.5×18.0<br>6.0×12.0×18.0<br>7.0×12.5×18.0<br>8.0×14.0×18.0<br>8.5×14.5×18.0<br>9.0×17.5×18.0<br>11.0×18.5×18.0|B32922C3333K***<br>B32922C3473K***<br>B32922C3683K***N<br>B32922C3104+***N<br>B32922C3154+***N<br>B32922C3224+***N<br>B32922C3334M***N<br>B32922D3334K***<br>B32922C3474+***N<br>B32922C3684+***N|4680<br>4680<br>4680<br>4680<br>3840<br>3320<br>2920<br>2720<br>2560<br>�|5200<br>5200<br>5200<br>5200<br>4400<br>3600<br>3000<br>2800<br>2800<br>2200|4000<br>4000<br>4000<br>4000<br>4000<br>4000<br>2000<br>2000<br>2000<br>1000|
|22.5|0.22<br>0.33<br>0.33<br>0.47<br>0.68<br>1.0<br>1.5<br>2.2|6.0×15.0×26.5<br>6.0×15.0×26.5<br>7.0×16.0×26.5<br>8.5×16.5×26.5<br>10.5×16.5×26.5<br>11.0×20.5×26.5<br>12.0×22.0×26.5<br>14.5×29.5×26.5|B32923C3224+***<br>B32923C3334M***<br>B32923D3334K***<br>B32923C3474+***<br>B32923C3684+***<br>B32923C3105+***N<br>B32923C3155M***<br>B32923C3225+***|2720<br>2720<br>2320<br>1920<br>1560<br>1480<br>�<br>�|2800<br>2800<br>2400<br>2000<br>1600<br>1400<br>�<br>�|2880<br>2880<br>2520<br>2040<br>2160<br>2040<br>1800<br>1040|



## N Preferred type 

MOQ = Minimum Order Quantity, consisting of 4 packing units. For new design, please refer to the B3292xE/F data sheet. Further intermediate capacitance values on request. 

## **Composition of ordering code** 

- + = Capacitance tolerance code: M = ± 20% K = ± 10% 

- *** = Packaging code: 289 = Ammo pack 189 = Reel 000 = Untaped (lead length 6 �1 mm) 

(Closer tolerances on request) 

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

Page 4 of 18 

## **B32921C/D ... B32926C/D X2 / 305 V AC** 

## **Ordering codes and packing units** 

|Lead spacing<br>mm|CR<br>µF|Max. dimensions<br>w×h×l<br>mm|Ordering code<br>(composition see<br>below)|Ammo<br>pack<br>pcs./MOQ|Reel<br>pcs./<br>MOQ|Untaped<br>pcs./<br>MOQ|
|---|---|---|---|---|---|---|
|27.5|0.68<br>1.0<br>1.5<br>2.2<br>3.3<br>3.3<br>4.7<br>4.7|11.0×19.0×31.5<br>11.0×19.0×31.5<br>12.5×21.5×31.5<br>14.0×24.5×31.5<br>16.0×32.0×31.5<br>18.0×27.5×31.5<br>18.0×33.0×31.5<br>21.0×31.0×31.5|B32924C3684+***<br>B32924C3105+***<br>B32924C3155+***N<br>B32924C3225+***<br>B32924D3335K***<br>B32924C3335M***<br>B32924C3475M***<br>B32924D3475K***|�<br>�<br>�<br>�<br>�<br>�<br>�<br>�|1400<br>1400<br>1200<br>�<br>�<br>�<br>�<br>�|1280<br>1280<br>1120<br>1040<br>880<br>800<br>800<br>720|
|37.5|2.2<br>3.3<br>4.7<br>6.8<br>10|14.0×25.0×41.5<br>16.0×28.5×41.5<br>18.0×32.5×41.5<br>20.0×39.5×41.5<br>28.0×42.5×41.5|B32926C3225+***<br>B32926C3335+***<br>B32926C3475+***<br>B32926C3685+***<br>B32926C3106+***|�<br>�<br>�<br>�<br>�|�<br>�<br>�<br>�<br>�|1380<br>800<br>720<br>640<br>440|



N Preferred type 

MOQ = Minimum Order Quantity, consisting of 4 packing units. For new design, please refer to the B3292xE/F data sheet. Further intermediate capacitance values on request. 

## **Composition of ordering code** 

+ = Capacitance tolerance code: M = ± 20% K = ± 10% 

*** = Packaging code: 289 = Ammo pack 189 = Reel 000 = Untaped (lead length 6 �1 mm) 

(Closer tolerances on request) 

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

Page 5 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

## **Technical data** 

|Max. operatingtemperature Top,max|+110°C|||||
|---|---|---|---|---|---|
|Dissipation factor tanδ(in 10-3)<br>at 20°C (upper limit values)||CR≤0.1 µF||0.1µF<CR≤2.2 µF|CR>2.2 µF|
||at<br>1 kHz<br>100 kHz|1.0<br>5.0||1.0<br>�|2.0<br>�|
|Insulation resistance Rins<br>or time constantτ= CR�Rins<br>at 20°C, rel. humidity≤65%<br>(minimum as-delivered values)|CR≤0.33 µF|CR>0.33 µF||||
||100 000 MΩ|30 000|s|||
|DC test voltage|2121 V, 2 s|||||
|Passive flammability category<br>to IEC 40(CO)752|B|||||
|Maximum continuous DC voltage VDC|630 V|||||
|Maximum continuous AC voltage VAC|310 V (50/60|Hz)||||
|Rated AC voltage(IEC 60384-14)|305 V(50/60|Hz)||||
|Operating AC voltage Vopat high<br>temperature|TA≤110°C||Vop= VAC<br>(continuously)|||
||TA≤110°C||Vop= 1.25�VAC<br>(1000 h)|||
|Damp heat test<br>Limit values after damp heat test|56 days / 40°C / 93% relative humidity<br>Capacitance change�∆C/C�<br>≤5%<br>Dissipation factor change∆tanδ<br>≤0.5�10-3 (at 1 kHz)<br>Insulation resistance Rins<br>≤1.0�10-3 (at 10 kHz)<br>or time constantτ= CR�Rins<br>≥50% of minimum<br>as-delivered values|||||



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

Page 6 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

## **Pulse handling capability** 

"dV/dt" represents the maximum permissible voltage change per unit of time for non-sinusoidal voltages, expressed in V/ µ s. 

"k0" represents the maximum permissible pulse characteristic of the waveform applied to the capacitor, expressed in V[2] / µ s. 

## _Note:_ 

_The values of dV/dt and k0 provided below must not be exceeded in order to avoid damaging the capacitor._ 

## **dV/dt and k0 values** 

|**dV/dt and k0 values**||||||
|---|---|---|---|---|---|
|Lead spacing|10 mm|15 mm|22.5 mm|27.5 mm|37.5 mm|
|dV/dt in V/µs|475|340|170|120|80|
|k0in V2/µs|408500|292400|146200|103200|68800|



## **Impedance Z versus frequency f** 

(typical values) 

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

Page 7 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

## **Mounting guidelines** 

## **1 Soldering** 

## **1.1 Solderability of leads** 

The solderability of terminal leads is tested to IEC 60068-2-20, test Ta, method 1. 

Before a solderability test is carried out, terminals are subjected to accelerated ageing (to IEC 60068-2-2, test Ba: 4 h exposure to dry heat at 155 ° C). Since the ageing temperature is far higher than the upper category temperature of the capacitors, the terminal wires should be cut off from the capacitor before the ageing procedure to prevent the solderability being impaired by the products of any capacitor decomposition that might occur. 

|Solder bath temperature|235±5°C|
|---|---|
|Solderingtime|2.0±0.5 s|
|Immersion depth|2.0 +0/�0.5 mm from capacitor bodyor seating plane|
|Evaluation criteria:<br>Visual inspection|Wettingof wire surface bynew solder≥90%, free-flowingsolder|



## **1.2 Resistance to soldering heat** 

Resistance to soldering heat is tested to IEC 60068-2-20, test Tb, method 1A. Conditions: 

|Series|Solder bath temperature|Solderingtime|
|---|---|---|
|MKT<br>boxed (except 2.5×6.5×7.2 mm)<br>coated<br>uncoated(lead spacing> 10 mm)|260±5°C|10±1 s|
|MFP<br>MKP<br>(lead spacing> 7.5 mm)|||
|MKT<br>boxed(case 2.5×6.5×7.2 mm)||5±1 s|
|MKP<br>MKT<br>(lead spacing≤7.5 mm)<br>uncoated (lead spacing≤10 mm)<br>insulated (B32559)||< 4 s<br>recommended soldering<br>profile for MKT uncoated<br>(lead spacing≤10 mm) and<br>insulated(B32559)|



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

Page 8 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

|Immersion depth|2.0 +0/�0.5 mm from capacitor bodyor seating plane|
|---|---|
|Shield|Heat-absorbing board, (1.5±0.5) mm thick, between capacitor<br>bodyand liquid solder|
|Evaluation criteria:<br>Visual inspection<br>∆C/C0<br>tanδ|No visible damage<br>2% for MKT/MKP/MFP<br>5% for EMI suppression capacitors<br>As specified in sectional specification|



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

Page 9 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

## **1.3 General notes on soldering** 

Permissible heat exposure loads on film capacitors are primarily characterized by the upper category temperature Tmax. Long exposure to temperatures above this type-related temperature limit can lead to changes in the plastic dielectric and thus change irreversibly a capacitor's electrical characteristics. For short exposures (as in practical soldering processes) the heat load (and thus the possible effects on a capacitor) will also depend on other factors like: 

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Pre-heating temperature and time 

Forced cooling immediately after soldering 

- Terminal characteristics: 

- diameter, length, thermal resistance, special configurations (e.g. crimping) Height of capacitor above solder bath 

- Shadowing by neighboring components 

- Additional heating due to heat dissipation by neighboring components Use of solder-resist coatings 

The overheating associated with some of these factors can usually be reduced by suitable countermeasures. For example, if a pre-heating step cannot be avoided, an additional or reinforced cooling process may possibly have to be included. 

EPCOS recommends the following conditions: 

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Pre-heating with a maximum temperature of 110 ° C 

Temperature inside the capacitor should not exceed the following limits: 

- MKP/MFP 110 ° C 

- MKT 160 ° C 

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When SMD components are used together with leaded ones, the leaded film capacitors should not pass into the SMD adhesive curing oven. The leaded components should be assembled after the SMD curing step. 

Leaded film capacitors are not suitable for reflow soldering. 

## **Uncoated capacitors** 

For uncoated MKT capacitors with lead spacings ≤ 10 mm (B32560/B32561) the following measures are recommended: 

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pre-heating to not more than 110 ° C in the preheater phase rapid cooling after soldering 

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

Page 10 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

## **2 Cleaning** 

To determine whether the following solvents, often used to remove flux residues and other substances, are suitable for the capacitors described, refer to the table below: 

|Type|Ethanol,<br>isopropanol,<br>n-propanol|n-propanol-water<br>mixtures,<br>water with surface<br>tension-reducing<br>tensides(neutral)|Solvent from<br>table A (see<br>next page)|Solvent from<br>table B (see<br>next page)|
|---|---|---|---|---|
|MKT<br>(uncoated)|Suitable|Unsuitable|In part suitable|<br>Unsuitable|
|MKT, MKP, MFP<br>(coated/boxed)||Suitable|Suitable||



Even when suitable solvents are used, a reversible change of the electrical characteristics may occur in uncoated capacitors immediately after they are washed. Thus it is always recommended to dry the components (e.g. 4 h at 70 ° C) before they are subjected to subsequent electrical testing. 

## **Table A** 

Manufacturers' designations for trifluoro-trichloro-ethane-based cleaning solvents (selection) 

|Trifluoro-trichloro-<br>ethane|Mixtures of trifluoro-trichloro-ethane with ethanol and<br>isopropanol|Manufacturer|
|---|---|---|
|Freon TF<br>Frigen 113 TR<br>Arklone P<br>Kaltron 113 MDR<br>Flugene 113|Freon TE 35; Freon TP 35; Freon TES<br>Frigen 113 TR-E; Frigen 113 TR-P; Frigen TR-E 35<br>Arklone A; Arklone L; Arklone K<br>Kaltron 113 MDA; Kaltron 113 MDI; Kaltron 113 MDI 35<br>Flugene 113 E; Flugene 113 IPA|Du Pont<br>Hoechst<br>ICI<br>Kali-Chemie<br>Rhone-Progil|



## **Table B (worldwide banned substances)** 

Manufacturers' designations for unsuitable cleaning solvents (selection) 

|Mixtures of chlorinated hydrocarbons and ketones with fluorated hydrocarbons|Manufacturer|
|---|---|
|Freon TMC; Freon TA; Freon TC<br>Arklone E<br>Kaltron 113 MDD; Kaltron 113 MDK<br>Flugene 113 CM|Du Pont<br>ICI<br>Kali-Chemie<br>Rhone-Progil|



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

Page 11 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

## **3 Embedding of capacitors in finished assemblies** 

In many applications, finished circuit assemblies are embedded in plastic resins. In this case, both chemical and thermal influences of the embedding ("potting") and curing processes must be taken into account. 

Our experience has shown that the following potting materials can be recommended: non-flexible epoxy resins with acid-anhydride hardeners; chemically inert, non-conducting fillers; maximum curing temperature of 100 ° C. 

## **Caution:** 

Consult us first if you wish to embed uncoated types! 

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

Page 12 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

## **Cautions and warnings** 

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Do not exceed the upper category temperature (UCT). Do not apply any mechanical stress to the capacitor terminals. Avoid any compressive, tensile or flexural stress. 

Do not move the capacitor after it has been soldered to the PC board. Do not pick up the PC board by the soldered capacitor. 

Do not place the capacitor on a PC board whose PTH hole spacing differs from the specified lead spacing. 

Do not exceed the specified time or temperature limits during soldering. Avoid external energy inputs, such as fire or electricity. Avoid overload of the capacitors. 

The table below summarizes the safety instructions that must always be observed. A detailed description can be found in the relevant sections of the chapters "General technical information" and "Mounting guidelines". 

|Topic|Safety information|Reference chapter<br>"General technical<br>information"|
|---|---|---|
|Storage conditions|Make sure that capacitors are stored within the<br>specified range of time, temperature and humidity<br>conditions.|4.5<br>"Storage conditions"|
|Flammability|Avoid external energy, such as fire or electricity<br>(passive flammability), avoid overload of the<br>capacitors (active flammability) and consider the<br>flammabilityof materials.|5.3<br>"Flammability"|
|Resistance to<br>vibration|Do not exceed the tested ability to withstand<br>vibration. The capacitors are tested to<br>IEC 60068-2-6.<br>EPCOS offers film capacitors specially designed<br>for operation under more severe vibration regimes<br>such as those found in automotive applications.<br>Consult our catalog "Film Capacitors for<br>Automotive Electronics".|5.2<br>"Resistance to vibration"|



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

Page 13 of 18 

**B32921C/D ... B32926C/D X2 / 305 V AC** 

|Topic|Safety information|Reference chapter<br>"Mounting guidelines"|
|---|---|---|
|Soldering|Do not exceed the specified time or temperature<br>limits duringsoldering.|1 "Soldering"|
|Cleaning|Use onlysuitable solvents for cleaningcapacitors.|2 "Cleaning"|
|Embedding of<br>capacitors in<br>finished assemblies|When embedding finished circuit assemblies in<br>plastic resins, chemical and thermal influences<br>must be taken into account.<br>Caution: Consult us first, if you also wish to<br>embed other uncoated component types!|3 "Embedding of<br>capacitors in finished<br>assemblies"|



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

Page 14 of 18 

## **B32921C/D ... B32926C/D X2 / 305 V AC** 

## **Symbols and terms** 

|Symbol|English|German|
|---|---|---|
|α<br>αC<br>A<br>βC<br>C<br>CR<br>∆C<br>∆C/C<br>∆C/CR<br>dt<br>∆t<br>∆T<br>∆tanδ<br>∆V<br>dV/dt<br>∆V/∆t<br>E<br>ESL<br>ESR<br>f<br>f1<br>f2<br>fr<br>FD<br>FT<br>i<br>IC|Heat transfer coefficient<br>Temperature coefficient of capacitance<br>Capacitor surface area<br>Humidity coefficient of capacitance<br>Capacitance<br>Rated capacitance<br>Absolute capacitance change<br>Relative capacitance change (relative<br>deviation of actual value)<br>Capacitance tolerance (relative deviation<br>from rated capacitance)<br>Time differential<br>Time interval<br>Absolute temperature change<br>(self-heating)<br>Absolute change of dissipation factor<br>Absolute voltage change<br>Time differential of voltage function (rate<br>of voltage rise)<br>Voltage change per time interval<br>Activation energy for diffusion<br>Self-inductance<br>Equivalent series resistance<br>Frequency<br>Frequency limit for reducing permissible<br>AC voltage due to thermal limits<br>Frequency limit for reducing permissible<br>AC voltage due to current limit<br>Resonant frequency<br>Thermal acceleration factor for diffusion<br>Derating factor<br>Current (peak)<br>Category current (max. continuous<br>current)|Wärmeübergangszahl<br>Temperaturkoeffizient der Kapazität<br>Kondensatoroberfläche<br>Feuchtekoeffizient der Kapazität<br>Kapazität<br>Nennkapazität<br>Absolute Kapazitätsänderung<br>Relative Kapazitätsänderung (relative<br>Abweichung vom Ist-Wert)<br>Kapazitätstoleranz (relative Abweichung<br>vom Nennwert)<br>Differentielle Zeit<br>Zeitintervall<br>Absolute Temperaturänderung<br>(Selbsterwärmung)<br>Absolute Änderung des Verlustfaktors<br>Absolute Spannungsänderung<br>Differentielle Spannungsänderung<br>(Spannungsflankensteilheit)<br>Spannungsänderung pro Zeitintervall<br>Aktivierungsenergie zur Diffusion<br>Eigeninduktivität<br>Ersatz-Serienwiderstand<br>Frequenz<br>Grenzfrequenz für thermisch bedingte<br>Reduzierung der zulässigen<br>Wechselspannung<br>Grenzfrequenz für strombedingte<br>Reduzierung der zulässigen<br>Wechselspannung<br>Resonanzfrequenz<br>Therm. Beschleunigungsfaktor zur<br>Diffusion<br>Deratingfaktor<br>Stromspitze<br>Kategoriestrom (max. Dauerstrom)|



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

Page 15 of 18 

## **B32921C/D ... B32926C/D X2 / 305 V AC** 

|Symbol|English|German|
|---|---|---|
|IRMS<br>iz<br>k0<br>LS<br>λ<br>λ0<br>λtest<br>Pdiss<br>Pgen<br>Q<br>ρ<br>R<br>R<br>Ri<br>Rins<br>RP<br>RS<br>S<br>t<br>T<br>τ<br>tanδ<br>tanδD<br>tanδP<br>tanδS<br>TA<br>Tmax<br>Tmin<br>tOL<br>Top<br>TR<br>Tref<br>tSL<br>VAC|(Sinusoidal) alternating current,<br>root-mean-square value<br>Capacitance drift<br>Pulse characteristic<br>Series inductance<br>Failure rate<br>Constant failure rate during useful<br>service life<br>Failure rate, determined by tests<br>Dissipated power<br>Generated power<br>Heat energy<br>Density of water vapor in air<br>Universal molar constant for gases<br>Ohmic resistance of discharge circuit<br>Internal resistance<br>Insulation resistance<br>Parallel resistance<br>Series resistance<br>severity (humidity test)<br>Time<br>Temperature<br>Time constant<br>Dissipation factor<br>Dielectric component of dissipation<br>factor<br>Parallel component of dissipation factor<br>Series component of dissipation factor<br>Ambient temperature<br>Upper category temperature<br>Lower category temperature<br>Operating life at operating temperature<br>and voltage<br>Operating temperature<br>Rated temperature<br>Reference temperature<br>Reference service life<br>AC voltage|(Sinusförmiger) Wechselstrom<br>Inkonstanz der Kapazität<br>Impulskennwert<br>Serieninduktivität<br>Ausfallrate<br>Konstante Ausfallrate in der<br>Nutzungsphase<br>Experimentell ermittelte Ausfallrate<br>Abgegebene Verlustleistung<br>Erzeugte Verlustleistung<br>Wärmeenergie<br>Dichte von Wasserdampf in Luft<br>Allg. Molarkonstante für Gas<br>Ohmscher Widerstand des<br>Entladekreises<br>Innenwiderstand<br>Isolationswiderstand<br>Parallelwiderstand<br>Serienwiderstand<br>Schärfegrad (Feuchtetest)<br>Zeit<br>Temperatur<br>Zeitkonstante<br>Verlustfaktor<br>Dielektrischer Anteil des Verlustfaktors<br>Parallelanteil des Verlfustfaktors<br>Serienanteil des Verlustfaktors<br>Umgebungstemperatur<br>Obere Kategorietemperatur<br>Untere Kategorietemperatur<br>Betriebszeit bei Betriebstemperatur und<br>-spannung<br>Beriebstemperatur<br>Nenntemperatur<br>Referenztemperatur<br>Referenz-Lebensdauer<br>Wechselspannung|



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

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## **B32921C/D ... B32926C/D X2 / 305 V AC** 

|Symbol|English|German|
|---|---|---|
|VC<br>VC,RMS<br>VCD<br>Vch<br>VDC<br>VFB<br>Vi<br>Vo<br>Vop<br>Vp<br>Vpp<br>VR<br>R<br>VRMS<br>VSC<br>Vsn<br>Z|Category voltage<br>Category AC voltage<br>Corona-discharge onset voltage<br>Charging voltage<br>DC voltage<br>Fly-back capacitor voltage<br>Input voltage<br>Output voltage<br>Operating voltage<br>Peak pulse voltage<br>Peak-to-peak voltage Impedance<br>Rated voltage<br>Amplitude of rated AC voltage<br>(Sinusoidal) alternating voltage,<br>root-mean-square value<br>S-correction voltage<br>Snubber capacitor voltage<br>Impedance<br>Lead spacing|Kategoriespannung<br>(Sinusförmige)<br>Kategorie-Wechselspannung<br>Teilentlade-Einsatzspannung<br>Ladespannung<br>Gleichspannung<br>Spannung (Flyback)<br>Eingangsspannung<br>Ausgangssspannung<br>Betriebsspannung<br>Impuls-Spitzenspannung<br>Spannungshub<br>Nennspannung<br>Amplitude der Nenn-Wechselspannung<br>(Sinusförmige) Wechselspannung<br>Spannung bei Anwendung "S-correction"<br>Spannung bei Anwendung<br>"Beschaltung"<br>Scheinwiderstand<br>Rastermaß|



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

Page 17 of 18 

## **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, 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 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.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, CSMP, CSSP, CTVS, DSSP, MiniBlue, MKK, MLSC, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, 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. 

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