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VISHAY CERA-MITE CAPACITORS& PTC THERMISTORSPTC ThermistorsCeramic Disc CapacitorsSpecial High Voltage Capacitorsw w w. v i s h a y. c o mDATA BOOKV I S H A Y I N T E R T E C H N O L O G Y, I N C .

VISHAY INTERTECHNOLOGY, INC.DISCRETESEMICONDUCTORSRECTIFIERSSMALL-SIGNAL DIODESZENER & SUPPRESSOR DIODESMOSFETsRF TRANSISTORSOPTOELECTRONICSICsPASSIVE COMPONENTSCAPACITORSRESISTIVE PRODUCTSMAGNETICSINTEGRATED MODULESMEASUREMENT SENSORSAND EQUIPMENTSchottky (single, dual)Standard, Fast and Ultra-Fast Recovery (single, dual)Clamper/DamperBridge SuperectifierSchottky and Switching (single, dual)Tuner/Capacitance (single, dual)BandswitchingPINZener Diodes (single, dual)TVS (TransZorb, Automotive, Arrays)Power MOSFETsJFETsBipolar RF Transistors (AF and RF)Dual Gate MOSFETs MOSMICsIR Emitters, Detectors and IR Receiver ModulesOpto Couplers and Solid State RelaysOptical SensorsLEDs and 7 Segment DisplaysInfrared Data Transceiver ModulesCustom productsPower ICsAnalog SwitchesTantalum CapacitorsSolid Tantalum CapacitorsWet Tantalum CapacitorsCeramic CapacitorsMultilayer Chip CapacitorsDisc CapacitorsFilm CapacitorsPower CapacitorsHeavy Current CapacitorsAluminum CapacitorsFoil ResistorsFilm ResistorsThin Film ResistorsThick Film ResistorsMetal Oxide Film ResistorsCarbon Film ResistorsWirewound ResistorsVariable ResistorsCermet Variable ResistorsWirewound Variable ResistorsConductive Plastic Variable ResistorsNetworks/ArraysNon-Linear ResistorsNTC ThermistorsPTC ThermistorsInductorsTransformersDC/DC CONVERTERSSTRAIN GAGESINSTRUMENTATIONPHOTOSTRESS PRODUCTSTRANSDUCERSStress Analysis Transducer-ClassInstallation AccessoriesStrain IndicatorsAmplifiersData SystemsPolariscopesPlasticsLoad CellsLinear Displacement SensorsMANUFACTURER OF THE WORLD'S BROADEST LINE OF DISCRETE SEMICONDUCTORS AND PASSIVE COMPONENTS

Vishay Cera-Mite Capacitorsand PTC ThermistorsVishay Cera-Mite1327 Sixth AvenueP.O. Box 166Grafton, WisconsinUSA 53024-0166Phone: 1 262 377 3500Fax: 1 262 377

The products listed in this catalog are not generally recommended for use in life supportsystems where a failure or malfunction of the component may directly threaten life orcause injury.The user of products in such applications assumes all risks of such use and will agree tohold Vishay Intertechnology, Inc. and all the companies whose products are representedin this catalog, harmless against all damages.All details in printed form are legally binding especially with respect to the provisions of§§463 and 480 II of the German Code of Civil Law after written conÞrmation only. Thedata indicated herein described the type of component and shall not be considered asassured characteristics.

Table of ContentsVishay Cera-MitePTC THERMISTORSTechnology and Application Overview . 2PTCR Motor Start Packages for HVAC - Application Notes and Selection Criteria . 3Custom Motor Start Pellets (EXPANDED Selection). 9Thermistors for Electronic Fluorescent Ballasts (NEW) . 10PTCR Over-Current Protection - Application Notes . 11Telecommunications Thermistors . 13General Purpose Current Limiters . 15CERAMIC DISC CAPACITORSCeramic Capacitor Application Data. 16Lower Voltage Capacitors (12 to 1000 Volt) . 18AC Line Rated Capacitors (NEW Approvals) - X & Y: EMI/RFI Filter, UL, CSA, IEC, etc. 20Low Dissipation Factor Ceramic Discs (NEW). 23High Voltage Ceramic Capacitors - 2kV to 15kV . 25High Voltage Axial Leaded Capacitors - 10kV to 30kV . 26Options for Radial Leaded Capacitors - Custom Disc Capability. 27Bulk Packaging & Wire Lead Options . 28Tape & Reel Packaging . 29SPECIAL HIGH VOLTAGE CAPACITORSHeavy Duty 10kV to 40kV Molded Epoxy Case . 30RF Duty Capacitors & Specialty OEM. 31Fabmika 1.5kV to 30kV - High Temp. & Aerospace. 32Document Number: 23084Revision 1

Full Line CatalogVishay Cera-MitePTCR Technology and ApplicationPTCR TECHNOLOGYWhat makes the PTCR such auseful device is its Resistance versusTemperature characteristic. It exhibits alow resistance over a wide temperaturerange, but upon reaching a certaintemperature it undergoes a dramaticincrease in resistance (several orders ofmagnitude). This temperature is calledthe Curie Temperature or SwitchingPoint .The increase in temperature can becaused by internal heat (I2R loss) or fromexternal ambient temperature increases.In applications, this rate of temperaturechange is often controlled to provide atime delay function. When the source ofthe heat is removed, the PTCR returnsto its initial base resistance.Fig T-1TYPICAL PTCR RT CURVE100,00010,000Resistance (Ohms)PTCRs (Positive Temperature CoefficientResistors) are made from high puritysemiconducting ceramics. Based oncomplex titanate chemical compositions(BaTiO , SrTiO , etc.), their specific33performance is created by the addition ofdopants and unique processing, includinghigh force pressing into desired shapesand precision sintering. After the creationof the PTCR pellets, highly specializedmetallurgical techniques are employed tocreate low ohmic contact systems. Theseelectrodes are bonded to the ceramicwith glass frit to provide great strengthand high current carrying capacity.Curie at 125 C1000100Ro at 25 C0255075100 125 150 175Temperature CPTC THERMISTORS ARE AVAILABLE IN THREE CONFIGURATIONSAs completely tested pellets forassembly into custom packages,utilizing high pressure mechanicalcontacts for refrigeration compressormotor starting and telecommunicationovercurrent protection.As components with wire leads forfluorescent lighting and electronicovercurrent protection applications.As part of rugged mechanicalpackages for PSC motor starting ofHVAC compressors and other motorstart applications.Unpackaged PTCR Pellets aresupplied with silver electrodes suitablefor custom mounting.Resettable PTC Overcurrent Protectorsand Fluorescent Lamp Starters.PTCRs used for PSC Motor Control inair conditioning applications.PTCR APPLICATIONSThe unique properties of the PTCR have been optimized to provide reliable and economic products in several special areas.PSC MOTOR STARTTHERMISTORSPTCRs are applied withsingle phase compressormotors used in the HVACand refrigeration industries. This severe dutycycle application requiresthe PTCR to repeatedlyswitch large currents atpower line voltages.Vishay Cera-Mite PTCRdevices have been engineered and perfectedover 20 years to withstand thermal cyclinganddeliverreliableperformance throughoutthe life of the refrigerationsystem. Both individualpellets and packageddevices are available.www.vishay.com2FLUORESCENTBALLAST STARTINGPTC Thermistors are usedin electronic ballast applications to extend the lifeof fluorescent lamps bycontrolling preheat currentand lamp ignition timing.A full range of standarddevices are availableand custom engineeredsamples can be rapidlycreated for special lampdesigns.Vishay Cera-Mite PTCThermistors are specifiedby major ballast manufacturers throughout theworld.SELF-RESETTING OVERCURRENT PROTECTORSVishay Cera-Mite PTC Thermistors have been developedto replace older overcurrentprotection concepts in:Tip and Ring ProtectionModulesfortelecommunication systems.Resettable Overcurrent Protectors for power supplies,data communication circuits,and automotive doorlocks.In overload situations, theability of the ceramic PTCRto switch reliably, and laterreset precisely to its initialresistance is consideredparamount to safe ATIONSThe relatively new PTCRtechnology is beingspecified by innovativeengineers into a varietyof application areas.Self-regulating heatersand time-delay currentrelays are several examples. Vishay Cera-Miteprovides engineeringassistance for customapplications.Document Number: 23084Revision 14-May-02

305C SeriesVishay Cera-MitePTCR Motor Start PackagesPSC Single Phase Motor Start Assist ECONOMICAL SOLID STATE TORQUE ASSIST FOR HEAT PUMPS, ROOM AIR, COMMERCIALAND RESIDENTIAL AIR CONDITIONING AND REFRIGERATION SYSTEMSPositive Temperature Coefficient Resistors have beenused for many years in millions of HVAC applications toprovide starting torque assistance to Permanent SplitCapacitor (PSC) single phase compressor motors.Sizes are available to cover the full range of 120/240 voltPSC compressor motors.Safety Agency RecognitionVishay Cera-Mite motor start PTCRs are recognized byUnderwriter Laboratories file E97640 in accordance withStandard for Thermistor Type Devices UL 1434; and CanadianStandards C22.2 No. 0-1991.RELATIVE COMPARISON OF VARIOUS MOTOR STARTING METHODSThree methods have historically been employed to generatestarting torque for PSC motors. All are well-proven technologies and may be compared relative to one another basedupon categories shown below.The importance of each category is dependent upon themotor application and industry sector.In general, if the PTCR starter produces sufficient startingtorque, it is considered the simplest and most economicalchoice.Table 1MECHANICALSTARTINGMETHODPTCR StarterStart Cap withPTCR Acting asA Current RelayStart Cap usedWith Potential orCurrent RelayEASE OFWIRINGSimple2 WireModerate2 or 3WireDifficult4 or 5WireELECTRICALFINANCIALPANEL SENSITIVE TO ACCELERATION ACCELERATION RESETINVENTORYSPACE RED DIRECTIONPRODUCEDTIMEREQUIRED GENERATED TECHNOLOGY REQUIRED RELIABILITYCOSTLowestNoLowestFixed3-5NoSolid d2-5NoSolid iableBased onMotor IMPLIFIED PTCR STARTING DIAGRAMFig T-2L1Restart. It is important to providetime between motor starts to allowthe PTCR to cool to near its initialtemperature. This time is usually3 to 5 minutes and is determined bythe thermostat (THERM) or separatetime-delay relay (TR). Attempts torestart in less time may be successfuldepending on compressor equalization, line voltage, temperature, andother conditions. If the motor were tostall in a locked-rotor state, overloaddevice (PD or TS) would open theline and a further time delay wouldoccur until the motor overload isreset. Motor start PTCRs are appliedto compressors having means toequalize pressure during shutdown.TYPICAL PTCR CHARACTERISTICSAS A MOTOR START DEVICEFig T-310,000PTCR Resistance (ohms)Start Sequence. When starting thecompressor, contactor (M) closes;the PTCR, which is at low resistance,provides starting current to the motor’sauxiliary winding. After time delay (t),the current passing through the PTCRcauses it to heat and “switch” to a veryhigh resistance. At this point the motor isup to speed and the run capacitor (C R )determines the current in the auxiliarywinding. The PTCR remains hotand at high resistance as longas voltage remains on the circuit.When contactor (M) opens, shuttingoff voltage to the compressor,the PTCR cools to its initial lowresistance and is again ready to providetorque assist on the next tch Time (t)RESISTANCE100.0215050100PTCR Temperature C20.0PDMProtectiveDeviceTHERMTRMAC Line120 or 240VOLTS vertemp.SwitchOptional OFFTime Delay TRRelayMMAINCRAUX.PTCRL2Low Voltage Control Transformers Not ShownDocument Number: 23084Revision 3

305C SeriesVishay Cera-MitePTCR Motor Start PackagesSTART AND ACCELERATION TORQUESSINGLE PHASE PSC HIGH EFFICIENCY COMPRESSORSThe use of a PTCR start assist insures sufficient accelerationtorque to overcome not only breakaway friction, but alsoparasitic asynchronous torques associated with the 5th and7th motor harmonics or lamination slot harmonics.Fig T-4100A1ACCELERATION TIME CONSIDERATIONS22RPM x WK (lb ft )Avg. Torque (lb ft) x 308(Avg. Torque Curve B - Curve A)1. If (Curve B - Curve A) is zero or less, the motor may stall.2. In calculating torque available from Curve B, allowanceshould be made for cusps in the torque curve dueto harmonics. The time needed to accelerate from restto 1/2 speed is critical, as the average torque availablein this region is limited. Select a PTCR with sufficientswitching time (t) to accelerate the compressor.Percent Rated SpeedThe time to accelerate a rotating machine is:Accelerating Time (Seconds) Full LoadOperating PointA2max.Torque7550B125B25thPossible Region ofHarmonic Torques7thSlot0100CURVE A1Torque req’dto accelerateunloadedcompressor3. Scroll and rotary compressors may have less breakawaytorque than shown.4. A compressor with no equalization may require over100% starting torqe and time as long as several seconds.PTCR starters not recommended.200Percent Rated TorqueCold Breakaway TorqueCURVE A2Torque req’d toacceleratecompressor atpartial differentialpressureCURVE B1Motor speedversus torquewith run caponlyCURVE B2Motor speedversus torquewith run capand PTCRCONSIDERATIONS FOR CURRENT IN PTCRAPPROXIMATE EQUIVALENT CIRCUIT PSC MOTOR AT ZERO SPEEDFig T-5Line Voltage VMHP x 746IL (run) IL (start) 6 x IL runL2L1VM x pf x effILRM *IMXM *IauxFor running conditions:ILIcCIf Vaux VM, then IM and Iaux 2ILIf Vaux VM, then Iaux VMx 2VMand Zaux VauxIauxXauxRauxPTCRVauxIR*R and X are total of stator and rotorFor the greatest starting torque, PTCR should be chosen to make:VM x IM Vaux x Iaux. In many cases the auxiliary VoltAmperes are limited to about 50% of the main windingVolt-Amperes to get 50% - 70% rated torque.Fig T-6Simplified Voltage Diagram of the PSC Motor at OperatingSpeedThen at start, with PTCR in series: Z'aux R PTCR ZauxVMI R start through PTCR Z'aux*IA (auxiliary current) leads IM (main current)by 80 to 90 when C (run capacitor) ischosen for balanced operation at 3/4 tofull load. Line Power Factor sine 2θIC start through Run Cap θ1VM; Xc ohmsXc2 πf C Iaux start IR start IC startIf Zaux is low impedance, less than 10% of RPTCRthen it can be ignored and IPTCR at start V MRPTCRThis closely approximates the condition for motors over 1/2 liedVoltageCRV PT VCCA IθIAIM VADocument Number: 23084Revision 14-May-02

305C SeriesPTCR Motor Start PackagesVishay Cera-MiteEFFECT OF PTC RESISTANCE ON STARTING TORQUE OF PSC MOTORSTable 2A. Rated torque is the torque at full speed rated load.It is calculated as:HP x 5250Torque (lb - ft) RPMLOCKED ROTORSTARTING TORQUE WITH RUN CAPTORQUE WITH RUNAND PTCR (% RATED TORQUE) (SEE B)MOTOR HP CAP ONLYRESISTANCE (Rdyn)(TABLE 4) % RATED TORQUE(NOTE 7)(SEE A)50 ohm 25 ohm 20 ohm 12.5 ohm 10 ohm0.525% to 35% 70 - 100% 80 - 100%NANANA125% to 35%50 - 70% 70 - 100%NANANA220% to 30%40 - 60% 60 - 90% 70 - 100% 70 - 100% 80 - 100%3.520% to 30%NAThe range shown includes both normal slip and highefficiency low slip motors. Starting torque varies as:(Line Voltage) 2 .B. Figure T-4 shows effect of using PTCR to increasestarting torque. For reciprocating compressors, it isadvised to choose a resistance value that gives at least50% rated torque at locked rotor. Scroll and rotarycompressors may require less torque.40 - 60% 50 - 85% 60 - 90% 70 - 100%515% to 25%NANA6.515% to 25%NANA40 - 60% 50 - 75% 60 - 90%NA40 - 70% 50 - 80%TYPICAL PTCR CURRENT VS. TIME SHOWING DEFINITION OF RDYN AND SWITCH TIME (T)RDYNFig T-7Time (t) KM (130 C - T0)PeakCurrentOSCILLOSCOPEM PTCR massT0 PTCR temp at time 0K 0.75 J/g/ CI PTCR Amperes (RMS)(Normalized)SHUNTR DYN Applied Voltage (ERMS)20% PeakCurrentIPTCRERMSI PTCR at .05 SecV 2 PTCRPTCRSwitch Time (t)00.10.2MotorContactorCloses0. to Switch (Seconds)START CAPACITOR REPLACEMENTSTARTING CURRENT APPROXIMATIONBASED ONCapacitor Starting ComparisonSome PSC motors have historically been started with acapacitor and relay. To deliver the same starting current asa start capacitor, a PTCR resistance is available for approximately equal ohms. Table 3 can be used for conversion.Even though the start current may be the same, the starttorques may differ depending on the motor design. The PTCRhas a fixed time built in. The start capacitor willstay in the circuit until a relay switches it out. Thelonger time provided by the capacitor and relay maybe needed on applications where equalization isnot present or adequate reset time is not available.Document Number: 23084Revision 14-May-020.8PTCR SwitchoutXc 12πfCTable 3START CAPACITOR50 microfarads75 microfarads100 microfarads125 microfarads200 microfarads250 VALUE50 ohms37.5 ohms25 ohms20 ohms12.5 ohms10 ohmswww.vishay.com5

305C SeriesVishay Cera-MitePTCR Motor Start PackagesPTCR SELECTIONChoosing the best PTCR for an application is a simplematter. See Table 4 and Table 2. Vishay Cera-Mite PTCRsare available in three case sizes (A, B, and C).Table 4 indicates the correct case size for the application.Table 2 shows how to choose the correct resistancevalue.Using a device too small or resistance too highwill give inadequate starting performance. An oversizedevice will not harm the motor, but may not be optimum withregards to acceleration dynamics, or power dissipation.The PTCR is generally self protecting when applied withinthe voltage and current ratings.Table 4PTCR MOTOR START SELECTION CHARTVISHAYCERA-MITEPARTCASENUMBER 305C11305C1*CCCBBBAAANote 1RESISTANCE (OHMS)RDYNR0 20% 30%2535502025501012.525355075304085152042.5Note 2SWITCH TIME(T) SECONDS@ 230VCURRENTRATINGAMPERESMAX. VOLTAGERATINGVOLTS, 63024410410410500500500500500500Note 3Note 4Note 5AVG. POWERDISSIPATIONWATTS3.53.53.5777999Note 6COMPRESSORRANGEBTU (000)HP10 - 288 - 185 - 1220 - 5018 - 4210 - 2528 - 6828 - 6214 - 360.75 - 2.00.5 - 1.50.25 - 1.01.5 - 4.01.5 - 3.51.0 - 2.53.0 - 7.03.0 - 6.01.5 - 3.5Note 7* Preferred ValuesNote 1Part number is stamped on the devicefor UL recognition. The customerpart number will also include 1 or3 character alpha-numeric suffix todesignate mounting bracket, customermarking, wire jumper, or other accessory furnished. The suffix is not markedon the part. Certified outline drawingand complete part number will befurnished on request for specificapplications. (Example: 305C19K01.)Mounting brackets and other accessories are shipped in separate boxesto simplify installation in end useequipment.Note 2RDYN is nominal resistance equal to E/Iwhen 230 volts, 60 Hz is applied (SeeFig T-7). This resistance determinescurrent and starting torque at themoment of application of voltage tothe motor and can be measured withan oscilloscope.For receiving inspection or routinetrouble shooting, the D.C. resistance(Ro) as measured with an ohmmeteris approximately 50% greater. Forexample: 305C20 measured with anohm meter would be 35 ohms 30%tolerance.www.vishay.com6Note 3Resistance values are duplicated inseveral case sizes (ie: 305C20, C12,and C1) to provide longer switch time(t) and higher current ratings (SeeFig T-7). Larger parts may be neededfor more difficult starting conditions(voltage or temperature) or may beused for accelerating fans againstback pressure.Note 4Maximum current in the PTCR isdetermined byMax Line VoltageMin RDYNMotor auxiliary winding impedanceis usually small compared to PTCRresistance, and does not materiallyaffect PTCR current.Current in PTCR is a percentage ofthe full motor inrush (locked rotor)current; usually 30% to 50% (SeeFig T-5).Note 5In application, the maximum voltage isthe voltage that appears across capacitor at rated speed, high line,light load. This is not the applied linevoltage (See Fig T-6).THESE DEVICES ARE INTENDEDFOR APPLICATION ON 240 VOLTLINES OR SYSTEMS WITH MAXIMUM LINE VOLTAGE UP TO 264VOLTS. The 305C20, 21 and 22 arealso used on 120 volt systems wherethe motor is designed to use samerun capacitor and PTCR as equivalent230 volt compressor.Note 6This is the power used to keep thePTCR switched off under full loadrunning conditions at typical ambienttemperature.Note 7BTU and horsepower ranges arefor reference only. PTCR may beapplied outside those ranges as longas maximum voltage and maximumcurrent are not exceeded. Scrolland rotary compressors may requireless starting assistance allowing useof smaller devices.Document Number: 23084Revision 14-May-02

305C SeriesPTCR Motor Start PackagesVishay Cera-MiteDIMENSIONS FOR PTCR MOTOR START DEVICES - IN INCHES PACKAGED MOTOR START PTCRs ARE OFFERED IN THREE DIFFERENT CASE SIZES TOACCOMMODATE THE RANGE OF PSC COMPRESSOR MOTORS SERVED.CASE STYLE CCASE305C20305C21305C22Case Style C is a 2-terminal single pelletdevice with current carrying capacityup to 10 amperes. It is furnished with around mounting bracket.CBlackBlackBlack.920.980.609.641Fig T-81.780maxMOUNTING BRACKET36-520MRound.329.358.9751.025.135 DIA.140WeldProjection (2)Round BracketSpring Steel Phosphate & Oil Finish. Accepts #6 SheetMetal Screw.298.328.050 HT. TYP.175 WD. TYP.200max.810.880.579.609CASE STYLE BCase Style B is a 2-terminal singlepellet unit with current carrying capacityup to 18 amperes. Depending uponthe model, either a U-shaped or roundbracket is furnished.CASE BMOUNTING Black or Blue305C19BlueFig T-9WeldProjection (3).050 HT. TYP.175 WD. TYP.15 OD x .055 HT4 places2.37 max.213.223 DIA.650max.25 max.2 places.135 41.406.110 Nail Pierce.120 axU-BracketSpring Steel Zinc DichromateFinish. Accepts #8 Sheet Metal ScrewRound BracketSpring Steel Phosphate &Oil Finish. Accepts #6 Sheet Metal ScrewCASE STYLE ACase Style A is a 3-terminal device thatincorporates two pellets in parallel, resulting inlower resistance values and current carryingcapacity up to 36 amperes. A jumper wire tocomplete the parallel connection with the twointernal pellets is required.CASE305C1305C9305C11Fig T-10ABlueTanTan.185.190 DIA.5.25 max2.75 max(To End of Q.C.).9901.010.15 OD X .055 HT4 Places.20 TYP.MOUNTING BRACKET7-36-4CU-Shaped36-520H.110 Nail Pierce.120 REF.WeldProjection (2).050 HT. TYP.175 WD. TYP.1.4751.525.550.580.135 DIA.140.298.3281.051.5901.6901.7161.78150-12789.75 Long105 C WireRound1.4901.5101.44max.650max.25 max3 PlacesWIRE JUMPER.579.609U-Bracket Spring Steel Zinc Dichromate Finish.Accepts #8 Sheet Metal Screw1.50maxRound BracketSpring Steel Phosphate & Oil Finish.Accepts #6 Sheet Metal ScrewOPERATING TEMPERATURECONNECTION DIAGRAMSUnder normal operation, the ceramicpellet inside the case reaches a temperature of 150 C. The plastic casematerial has been recognized by UL foroperation up to this temperature. Theactual temperature on the outside of thecase will be approximately 100 C whilethe motor is running. An appropriatemounting location and 105 C, 600 voltwiring are recommended.PTCR Motor Start units are connected directly across the PSC motor s runcapacitor. Case style A is a 3-terminal device and uses an external jumper wire toconnect the two internal pellets in parallel. A special piggyback terminal on thejumper wire provides for two connections on one side of the A-style case.Document Number: 23084Revision 14-May-02Fig T-11Fig T-12Motor RunCapMotor RunCapA Style3-Terminal & C Style2-Terminal Casewww.vishay.com7

305C SeriesVishay Cera-MitePTCR Motor Start PackagesVISHAY CERA-MITE MOTOR START FEATURESADVANCED CERAMIC ENGINEERING FORHVACVishay Cera-Mite s capability in large diameter ceramic pellets,unique formulations tailored to motor starting, and heavy dutyelectrode systems, have been developed and proven with thecooperation of HVAC industry experts over a period of 20 years.INHERENT PERFORMANCELarge diameter pellets make possible low resistancestart devices needed to match torque requirements of highefficiency compressor motors.Various package sizes offer selection of timing intervals,providing optimum switching time without dependence onsensing speed, counter EMF, or current.RUGGED MECHANICAL CONSTRUCTIONVishay Cera-Mite PTCR cases are molded from a UL94V0high temperature, engineered plastic/glass composite.Heavy duty aluminum contact plates and stainless steelforce springs are scaled to the pellet sizes and currentratings to insure no internal arcing and to enhance quickreset time.Unbreakable metal mounting brackets attach securely witha single screw. The NEW U - brackets developed by VishayCera-Mite feature lower power consumption and greater reliabilityby maximizing case to ground thermal impedance.SIMPLE AND ECONOMICALA solid state device requiring only 2 quick connect wiresand one bracket screw to install. Compared to the alternativestart capacitor and relay, PTCR start devices save severalwires, occupy less panel space, mount more easily, andcost less.OUTSTANDING RELIABILITYOver a fifteen year period, with an installed base of millionsof Vishay Cera-Mite PTCR start devices, experience hasdemonstrated reliability at 1.0 FITS or less. Users havebenefited from very low warranty expense.RESTARTCONSIDERATIONSFig T-13A properly sized PTCR willprovide adequate startingcurrent and starting timewith a cool down time of 3to 5 minutes, coordinatingperfectly with standard offdelay equalization timersRestart characteristics ofthe three case sizes areshown.100Fig T-15CASE STYLE BCASE STYLE C1007575% Initial 50Current50CASE STYLE A100ColdStartColdStartColdStart755 Min. Cooling250www.vishay.com8Fig T-143 Min.Cooling0503 Min.Cooling5 Min. Cooling25.2.4.6Time In Seconds.8003 Min.Cooling5 Min. Cooling25. In e In Seconds1.01.2Document Number: 23084Revision 14-May-02

307C SeriesVishay Cera-MitePTCR Motor Start PelletsSOLID CERAMICDISCAPPLICATION DATAComplete range of size/resistance combinations for 120 and 240 voltcompressor motors.Rugged silver electrodes well suited for long life pressure contactmounting.BASEELECTRODEDWithstand voltage is 2 times Voltage Max. rating.Application engineering assistance provided for custompellet designs.SILVERELECTRODETPTCR MOTOR START PELLETSVOLTAGE CURRENT DIAMETER (D) xMAX.MAX.THICKNESS (T)PARTR25 (OHMS) RDYN (OHMS) (VRMS)(ARMS)(mm)NUMBER542001016 x 2.5307C1674*5.54.21801216 x 2.5307C16706.852001016 x 2.5307C1700*85.81501016 x 2.5307C1280107.22001016 x 2.5307C1711*107.22001016 x 2.5307C17132013.52507.516 x 2.5307C149047303006.516 x 2.5307C113668423005.516 x 2.5307C104343.21801517.5 x 2.5307C1614541801217.5 x 2.5307C16686.852001017.5 x 2.5307C1644107.22001017.5 x 2.5307C16511510.5265617.5 x 2.5307C11902013320817.5 x 2.5307C172025173007.517.5 x 2.5307C106633223006.517.5 x 2.5307C10404730350417.5 x 2.5307C12846842400417.5 x 2.5307C12833.32.61601220 x 2.5307C14114.73.51801220 x 2.5307C14845.64.11801220 x 2.5307C15446.852001020 x 2.5307C1399107.2230920 x 2.5307C1489128.52508.520 x 2.5307C14761510.5300820 x 2.5307C15302215400820 x 2.5307C15313322355620 x 2.5307C12824730400520 x 2.5307C15336842430420 x 2.5307C12923.93 (@ 50V)1751620 x 3.2307C14871210.3 (@ 100V)350820 x 3.2307C15291412 (@ 100V)350820 x 3.2307C15453015.9 (@ 240V)3801220 x 3.2307C16402518 (@ 240V)400920 x 5.0307C15183825 (@ 240V)400920 x 5.0307C10245035 (@ 240V)4007.520 x 5.0307C14097550 (@ 240V)4005.520 x 5.0307C1410R25 zero power resistance 30% at 25 C; other tolerances available.RDYN nominal dynamic (effective) resistance, 120V applied unless otherwise noted.*High performance ceramic formulation, lower transition temperature provides reducedpower consumption for energy concious applications.Note: All

Vishay Cera-Mite Capacitors and PTC Thermistors Vishay Cera-Mite 1327 Sixth Avenue P.O. Box 166 Grafton, Wisconsin USA 53024-0166 Phone: 1 262 377

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environment, drawing setups, libraries ) Language settings for PTC Creo Parametric, PTC Creo Direct, PTC Creo Simulate, PTC Creo Layout, PTC Pro/INTRALINK, PTC Windchill PDMLink, and TOOLBOX Central storage of all configuration setti

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Abrasive jet Machining consists of 1. Gas propulsion system 2. Abrasive feeder 3. Machining Chamber 4. AJM Nozzle 5. Abrasives Gas Propulsion System Supplies clean and dry air. Air, Nitrogen and carbon dioxide to propel the abrasive particles. Gas may be supplied either from a compressor or a cylinder. In case of a compressor, air filter cum drier should be used to avoid water or oil .