PTC307C Series www.vishay.com Vishay Cera-Mite PTC Thermistors Motor Start Pellets FEATURES • Rugged silver electrodes well suited for long life OEM pressure contact mounting • Various pellet sizes for optimum inrush current and switching time • Withstanding voltage is 2 times the maximum voltage rating • UL approved pellets • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912 APPLICATIONS • Single Phase motorstart assist in • Refrigerator systems • Airconditioning systems • Heat-pumps QUICK REFERENCE DATA PARAMETER • Small compressors VALUE UNIT 3.3 to 75 Ω ± 30 % 4 to 16 ARMS Switching times (typical) 0.25 to 1.0 s Maximum voltage rating 160 to 450 VRMS Operating temperature range -10 to +85 °C Storage temperature range -25 to +105 °C Resistance value at 25 °C Tolerance on resistance value Current ratings • Inrush current generation DESCRIPTION These directly heated thermistors have a positive temperature coefficient and are primarily intended for inrush current generation. They consist of a high grade ceramic disk with two rugged pattern silver electrodes for contact pressure mounting. These ceramic pellets can be build into proprietary motor start devices for compressor, refrigerator and HVAC OEMs. MOUNTING The PTC thermistor pellets are suitable for pressure contact mounting in application specific housing assemblies. Examples of such assemblies can be found in the PTC305C series. Assembly housing must be appropriate for usage up to 180 °C surface temperature of the PTC pellets. The pellets are not solderable. MARKING The pellets are not marked. Marking is available on request for customized parts. SAFETY AGENCY RECOGNITION Vishay Cera-Mite motor start PTC pellet thermistors are recognized by Underwriter Laboratories file E148885 in accordance with Standard for Thermistor Type Devices UL 1434; and Canadian Standards C22.2 No. 0-1991. Document Number: 22998 1 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Revision: 11-Aug-10 PTC307C Series www.vishay.com Vishay Cera-Mite ELECTRICAL DATA AND ORDERING INFORMATION PART NUMBER PTC307C1674P PTC307C1700P PTC307C1711P PTC307C1668P PTC307C1644P PTC307C1651P PTC307C1720P PTC307C1411P PTC307C1484P PTC307C1544P PTC307C1399P PTC307C1489P PTC307C1476P PTC307C1530P PTC307C1531P PTC307C1282P PTC307C1533P PTC307C1292P PTC307C1487P PTC307C1529P PTC307C1545P PTC307C1640P PTC307C1740P PTC307C1024P PTC307C1409P PTC307C1410P R25 (1) ± 30 % (Ω) 5.0 6.8 10 5.0 6.8 10 20 3.3 4.7 5.6 6.8 10 12 15 22 33 47 68 3.9 12 14 30 30 38 50 75 RDYN (2) (Ω) 4.0 5.0 7.2 4.0 5.0 7.2 13 2.6 3.5 4.1 5.0 7.2 8.5 10.5 15 22 30 42 3.0 10.3 12 15.9 15.9 25 35 50 Vmeas. RDYN (VRMS) 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 50 100 100 240 240 240 240 240 MAX. VOLTAGE (3) (VRMS) 200 200 200 180 200 200 320 160 180 180 200 230 250 300 400 355 400 430 175 350 320 380 450 400 400 400 MAX. CURRENT (ARMS) 10 10 10 12 10 10 8 12 12 12 10 9 8.5 8 8 6 5 4 16 8 8 12 7 9 7.5 5.5 SIZE ØxT (mm) 16 + 0.2/- 0.4 x 2.5 ± 0.25 17.5 ± 0.3 x 2.5 ± 0.25 20 + 0.2/- 0.8 x 2.5 ± 0.25 20 + 0.2/- 0.8 x 3.2 ± 0.25 20 + 0.2/- 0.8 x 5.0 ± 0.25 UL (4) TSWITCH (°C) Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y 105 105 105 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 Notes • R25 = zero power resistance measured at < 0.5 VDC, standard tolerance ± 30 %, other tolerances and values on request • RDYN = nominal dynamic resistance during inrush, measured with Vmeas. applied, for information only • The maximum voltage is the voltage that appears across the PTC in a motor start application. This is not the applied line voltage. Withstanding voltage of all UL approved types is minimum twice the specified maximum operating voltage. • UL recoginition following XGPU2 category of standard UL1434, file E148885 TYPICAL PTC CURRENT VS. TIME SHOWING DEFINITION OF RDYN AND SWITCH TIME (t) RDYN = 20 % peak current 0 0.1 Motor contactor closes Vmeas. IPTC max. h x V x (Tswitch - T0) I2PTC x RDYN h = Specific heatcapacity = 2.3 J/Kcm3 T0 = PTC temp. at time 0 V = PTC volume in cm3 (D/2)2Tπ Switch time (t) 0.2 10 000 Current 10.0 1000 100 1.0 Switch time (t) 0.1 PTC Current (ARMS) Switch time t ≈ PTC Resistance (Ω) IPTC (ARMS) (Normalized) Peak current Resistance 10 0.3 0.4 0.5 0.6 0.7 0.8 Time to Switch (s) PTC switchout 50 100 PTC Temperature °C 150 0.01 Solid ceramic disc Base electrode D Silver electrode T Document Number: 22998 2 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. 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