document number: 33003 revision 22-sep-04 www.vishay.com 104 m, c, t vishay dale for technical questions, contact: thermistor1@vishay .com features ? small size - conformally coated. ? wide resistance range. ? available in 11 different r-t curves. ntc thermistors, coated description models m, c, and t are conformally coated, leaded thermistors for standard pc board mounting or assembly in probes. the coating is baked-on phenolic for durability and long-term stability. models m and c have tinned solid copper leads. model t has solid nickel wires with teflon ? insulation to provide isolation when assembled in metal probes or housings. ld diameter wire size type m awg 30: 0.0100 [0.254] type c awg 28: 0.0126 [0.320] type t awg 30: 0.0100 [0.254] dimensions in inches [millimeters] tinned copper wire teflon insulated nickel wire body dia. max. body dia. max. 1.5 [36.1] min. clean lead length 1/4 nom. 3 0.25 [76.2 6.4] curve global model resistance value point match tolerance packaging 01 c 2001 = 2k f = 1 % f = lead (pb)-free, bulk 02 mj = 5 % 03 tk = 10 % p = tin/lead, bulk 04 07 08 09 12 13 14 17 global part number information new global part numbering: 01c2001fp (preferred part numbering format) 01c2001fp historical part number example: 1c2001fp (will continue to be accepted) 01 c 2001 f p historical curve global model r esist ance value tolerance code packaging curve global model resistance value characteristics packaging curve track tolerance* 01 c 2001 = 2k f = lead (pb)-free, bulk s 02 m t 03 p = tin/lead, bulk 04 07 08 09 12 13 14 17 new global part numbering: 01c2001spc3 (preferred part numbering format) 01c2001spc3 historical part number example: 1c2001spc3 (will continue to be accepted) 1 c 2001 s p c3 historical curve global model resistance value characteristic packaging curve track tolerance a3 b3 c3 a2 b2 c2 a4 b4 a5 b5 c5 a8 b8 c8 *see following pages for tolerance explanations and details.
www.vishay.com 105 m, c, t vishay dale document number: 33003 revision 22-sep-04 for technical questions, contact: thermistor1@vishay .com 1234789121417 27 ? 33 ?? 50 ??? 56 ??? 68 ? ??? 82 ?? ??? 100 ?? ??? 120 ?? ??? 150 ??? ??? 180 ??? ??? 220 ??? ??? 270 ??? 330 ? ??? 390 ?? ??? 470 ?? ??? 500 ?? ??? 560 ?? ??? 680 ??? 820 ??? 1k ??? 1.2k ??? 1.5k ??? 1.8k ? ??? 2.2k ? ??? 2.7k ?? ??? 3.3k ?? ??? 3.9k ??? 4.7k ??? 5k ??? 5.6k ??? 6.8k ??? ? 8.2k ??? ? ? 10k ??? ? ?? ?? 12k ??? ? ?? ?? 15k ??? ?? ??? ??? 18k ??? ?? ??? ??? 22k ?? ??? ??? 27k ?? ? ? ??? ??? 33k ??? ? ?? ??? ??? 39k ??? ?? ?? ??? ??? 47k ??? ?? ??? ??? ??? 50k ??? ?? ??? ??? ??? 56k ??? ??? ??? ??? 68k ??? ??? ??? 82k ??? ??? ??? 100k ??? ??? ??? 120k ??? ??? 150k ??? ??? 180k ??? ??? 220k ??? 270k ??? 330k ? 390k ?? 470k ?? 500k ??? 560k ??? 680k ??? 820k ??? 1 meg ??? r 25 (ohms) curve number selection guide for type m, c, and t thermistors note: 1. intermediate resistance values between the standard value series are available. size would be the same as the color grouping. 2. other body diameters available. bead diameter increases as res. decreases. (consult factory) 3. leaded series of thermistors includes additional styles: (consult factory) type b: 26awg lead, 0.0159 [0.40] type f: 32awg lead, 0.008 [0.20] type e: 24awg lead, 0.020 [0.51] type d: 22awg lead, 0.025 [0.64] type g: 20awg lead, 0.032 [0.81] type h: 18awg lead, 0.040 [1.02] maximum body diameter ? 0.125 [3.2] ?? 0.110 [2.8] ??? 0.095 [2.4] dissipation constant 2 - 3 mwatts/ c thermal time constant 6 - 14 seconds ntc thermistors, coated
document number: 33003 revision 22-sep-04 www.vishay.com 106 m, c, t vishay dale for technical questions, contact: thermistor1@vishay .com description of thermistor tolerances the many applications of thermistors have mandated the need for two basic tolerance schemes for these products - curve tracking and point match thermistors. an example of the resistance tolerance at various temperatures for the two different tolerancing methods is described in the following graph: curve tracking tolerance thermistors are calibrated at the high temperature of the curve track range and then final tested at the low temperature of the curve track range. this ensures that the thermistor will meet the specified temperature accuracy at every temperature within the desired temperature range. several temperature ranges are available and the accuracy of the thermistor may be 0.2 c, 0.5 c, and 1.0 c. the curve tracking temperature ranges and their code designators are shown in figure 1 and table 1. to specify, add the appropriate suffix from the following table to the part number. example: 1m1002-b3 = curve 1, 10 kilohms at + 25 c, curve tracking to 0.5 c from 0 c to + 70 c tolerances available for type m, c and t thermistors tolerance ( %) temperature ( c) 5 % point match curve 1 c curve track curve 25 c 10 9 8 7 6 5 4 3 2 1 0 - 50 - 40 - 30 - 20 - 10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 a2 a8 a3 a5 a4 standard electrical specifications for curve tracking thermistors temp. range 0 c to + 70 c - 20 c to + 50 c0 c to + 100 c 25 c to + 90 c0 c to + 50 c tolerance 1 c 0.5 c 0.2 c 1 c 0.5 c 0.2 c 1 c 0.5 c 0.2 c 1 c 0.5 c 0.2 c 1 c 0.5 c 0.2 c part no. suffix - a3 - b3 - c3 - a2 - b2 - c2 - a4 - b4 - c4 - a5 - b5 - c5 - a8 - b8 - c8 c 1 xxx xxx xxn/axxxxxx u 2 xxx xxx xxn/axxxxxx r 4 xxx xxx xxn/axxxxxx v 8 xxx xxx xxn/axxxxxx e 9 xxx xxx xxn/axxxxxx ntc thermistors, coated
www.vishay.com 107 m, c, t vishay dale document number: 33003 revision 22-sep-04 for technical questions, contact: thermistor1@vishay .com the standard leaded thermistors are calibrated and tested at 25 c to a tolerance of 5 % or 10 %; however, tighter tolerance, point matched thermistors are readily available as are special point match temperatures to fit your application. since these thermistors have only one controlled point of reference (the point match temperature), the resistance at other temperatures is given by the "resistance vs. temperature conversion tables" for the appropriate material curve. the resistance value at any temperature is the ratio factor times the resistance at 25 c. example: 1m1002-5, +70 c resistance = (resistance factor for curve 1 at 70 c is 0.1990) x (10000 ohm resistance at 25 c) = 1990 ohms. the tolerance of the resistance at any temperature is described by figure 2. point match resistance tolerances at temperatures other than 25 oc are not the same as the calibration temperature. this difference is presented in figure 2. the tolerance at any given temperature is the point match tolerance + the mt % (manufacturing tolerance). the mt % may be obtained from the r vs. t conversion tables and is added to the point match temperature, i.e., 1 % tol. at 25 oc + 2.6 % at - 30 oc for curve 1 equals a total tolerance of 3.6 % at - 30 oc. a spreadsheet is available for the vishay thermistor materials that calculates beta, steinhart-hart equation constants a, b, and c, the resistance at any temperature based upon the steinhart constants or beta, the temperature equivalent of the resistance reading, and resistance temperature coefficients. this spread sheet will also calculate the total resistance tolerance of any point matched thermistor for temperatures in 10 oc increments, and the resistance tolerance at any temperature within the calibrated range of curve tracking thermistors. please contact factory if interested in this excel? spreadsheet. point match tolerance computer aids for thermistor selection figure 2 point match tolerances vs. temperature resistance temperature 25 c nominal r vs. t max. r vs. t min. r vs. t pivot point (calibration temperature) ntc thermistors, coated
document number: 91000 www.vishay.com revision: 18-jul-08 1 disclaimer legal disclaimer notice vishay all product specifications and data are subject to change without notice. vishay intertechnology, inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, ?vishay?), disclaim any and all liability fo r any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. vishay disclaims any and all li ability arising out of the use or application of any product describ ed herein or of any information provided herein to the maximum extent permit ted by law. the product specifications do not expand or otherwise modify vishay?s terms and conditions of purcha se, including but not limited to the warranty expressed therein, which apply to these products. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of vishay. the products shown herein are not designed for use in medi cal, life-saving, or life-sustaining applications unless otherwise expressly indicated. customers using or selling vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify vishay for any damages arising or resulting from such use or sale. please contact authorized vishay personnel to obtain written terms and conditions regarding products designed for such applications. product names and markings noted herein may be trademarks of their respective owners.
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