Philips Components Product specification NTC thermistors, accuracy line FEATURES * Accurate over a wide temperature range (tolerance on B-value between 2.5% and 0.75%) * Good stability over a long life * Excellent price/performance ratio * Flexible leads * Low heat conductivity through 0.4 mm diameter Ni-leads. APPLICATION Temperature sensing and control. DESCRIPTION These thermistors have a negative temperature coefficient. The device consists of a chip with two tinned Ni-leads. The device is colour coded. 2322 640 5.... QUICK REFERENCE DATA PARAMETER VALUE Resistance value at 25 C 2.7 to 470 k Tolerance on R25-value 5; 3; 2; 1 % Tolerance on B25/85-value 2.5 to 0.75 % Maximum dissipation 100 mW Response time (for information only) 1.7 s at zero dissipation (continuously) -40 to +125 C at zero dissipation (for short periods) 150 C at maximum dissipation (100 mW) 0 to +55 C ,, Operating temperature range: Climatic category 40/125/56 0.11 Mass Outline handbook, halfpage g 3 max 3.4 max ,,, ,, ,,, ,, PACKAGING The thermistors are packed in cardboard boxes; the smallest packing quantity is 500 units. I I II II 2 1 O 0.8 2.54 38 min MECHANICAL DATA Marking The thermistors are marked with coloured bands; see Fig.1 and Table 1. MBA933 - 1 O 0.4 Dimensions in mm. Mounting Fig.1 Component outline. By soldering in any position. 1997 Nov 14 UNIT 1 Philips Components Product specification NTC thermistors, accuracy line 2322 640 5.... ELECTRICAL CHARACTERISTICS Unless otherwise stated, measurements are in accordance with "IEC publication 539" ; see also Table 1. PARAMETER VALUE UNIT Standard selection tolerance on R25 5; 3; 2 and 1 Stability in accordance with "CECC 43000" and "IEC 68-2" see Table 2 Climatic category 40/125/56 Maximum dissipation 100 mW Dissipation factors (for information only) 2.2 mW/K Response time (for information only); note 1 1.7 s Thermal time constant (for information only) 13 s at zero dissipation (continuously) -40 to +125 C at zero dissipation (for short periods); note 2 150 C at maximum dissipation 0 to +55 C % Operating temperature range (see Fig.2): Notes 1. Response time in silicone oil MS 200/50. This is the time needed for the sensor to reach 63.2% of the total temperature difference when subjected to a temperature change from 25 C in air to 85 C in oil. 2. Valid for all types with the exception of 2322 640 5.474. Table 1 R25-values, catalogue numbers and coding; note 1 The thermistors have a 12-digit catalogue number starting with 2322 640 5. The subsequent 4 digits indicate the resistance value and tolerance. R25 (k) CATALOGUE NUMBER 2322 640 5.... B25/85-VALUE CODING (see Fig.1) R25 5% R25 3% R25 2% R25 1% I II 2.7 3977 K 0.75% 3272 6272 4272 5272 red red 4.7 3977 K 0.75% 3472 6472 4472 5472 green green 10 3977 K 0.75% 3103 6103 4103 5103 blue blue 47 4090 K 1.5% 3473 6473 4473 5473 black black 68 4190 K 1.5% 3683 6683 4683 - grey grey 100 4190 K 1.5% 3104 6104 4104 5104 brown brown 470 4570 K 1.5% 3474 6474 4474 - violet violet Note 1. Extended range available on request. 1997 Nov 14 2 Philips Components Product specification NTC thermistors, accuracy line Table 2 2322 640 5.... Resistance values at intermediate temperatures Tamb (C) RT/R25 R DUE TO B-TOLERANCE (%) -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 33.21 23.99 17.52 12.93 9.636 7.250 5.505 4.216 3.255 2.534 1.987 1.570 1.249 1.000 0.8059 0.6535 0.5330 0.4372 0.3605 0.2989 0.2490 0.2084 0.1753 0.1481 0.1256 0.1070 0.09154 0.07860 2.66 2.41 2.17 1.94 1.71 1.50 1.29 1.08 0.89 0.70 0.52 0.34 0.17 0.00 0.16 0.32 0.47 0.62 0.77 0.91 1.05 1.18 1.31 1.44 1.57 1.69 1.81 1.93 1997 Nov 14 TC (%/K) 6.57 6.36 6.15 5.95 5.76 5.58 5.40 5.24 5.08 4.92 4.78 4.64 4.50 4.37 4.25 4.13 4.02 3.91 3.80 3.70 3.60 3.51 3.42 3.33 3.25 3.16 3.09 3.01 R25 (k) 2322 640 .....; note 1 5.222 5.272 73.06 52.78 38.55 28.44 21.20 15.95 12.11 9.275 7.162 5.575 4.372 3.454 2.747 2.200 1.773 1.438 1.173 0.9618 0.7932 0.6575 0.5478 0.4586 0.3857 0.3258 0.2764 0.2355 0.2014 0.1729 89.67 64.77 47.31 34.91 26.02 19.58 14.86 11.38 8.790 6.842 5.366 4.239 3.372 2.700 2.176 1.764 1.439 1.180 0.973 0.807 0.672 0.562 0.473 0.399 0.339 0.289 0.247 0.212 3 5.332 5.472 5.682 109.6 156.1 225.8 79.17 112.8 163.1 57.82 82.35 119.1 42.67 60.77 87.92 31.80 45.30 65.53 23.93 34.08 49.30 18.16 25.87 37.43 13.91 19.81 28.67 10.74 15.30 22.14 8.362 11.91 17.23 6.558 9.340 13.51 5.181 7.378 10.67 4.121 5.869 8.492 3.300 4.700 6.800 2.660 3.788 5.480 2.156 3.072 4.444 1.759 2.505 3.624 1.443 2.055 2.972 1.190 1.694 2.451 0.9863 1.405 2.032 0.8217 1.170 1.693 0.6879 0.9797 1.417 0.5785 0.8239 1.192 0.4887 0.6960 1.007 0.4146 0.5905 0.8544 0.3532 0.5031 0.7278 0.3021 0.4303 0.6225 0.2594 0.3694 0.5345 5.103 332.1 240.0 175.2 129.3 96.36 72.50 55.05 42.16 32.56 25.34 19.87 15.70 12.49 10.00 8.059 6.535 5.330 4.372 3.606 2.989 2.490 2.084 1.753 1.481 1.256 1.070 0.9154 0.7860 Philips Components Product specification NTC thermistors, accuracy line Tamb (C) 100 105 110 115 120 125 130 135 140 145 150 RT/R25 0.06773 0.05858 0.05083 0.04426 0.03866 0.03387 0.02977 0.02624 0.02319 0.02055 0.01826 R DUE TO B-TOLERANCE (%) 2.04 2.15 2.26 2.37 2.47 2.57 2.67 2.77 2.86 2.96 3.05 2322 640 5.... R25 (k) TC (%/K) 2.94 2.87 2.80 2.73 2.67 2.61 2.55 2.49 2.43 2.38 2.33 2322 640 .....; note 1 5.222 5.272 5.332 5.472 5.682 5.103 0.1490 0.1289 0.1118 0.0974 0.0851 0.0745 0.0655 0.0577 0.0510 0.0452 0.0402 0.182 0.158 0.137 0.1195 0.1044 0.0915 0.0804 0.0709 0.0626 0.0555 0.0493 0.2235 0.1933 0.1677 0.1461 0.1276 0.1118 0.0982 0.0866 0.0765 0.0678 0.0603 0.3183 0.2753 0.2389 0.2080 0.1817 0.1592 0.1399 0.1233 0.1090 0.0966 0.0858 0.4607 0.3983 0.3457 0.3010 0.2629 0.2303 0.2024 0.1784 0.1577 0.1398 0.1242 0.6773 0.5858 0.5083 0.4426 0.3866 0.3387 0.2977 0.2624 0.2319 0.2055 0.1826 Note 1. Replace dot in last 5 digits of catalogue number by a number according to the following details and depending on tolerance on required R25-value: 4 for a tolerance of 2%; 6 for a tolerance of 3%; 3 for a tolerance of 5%; 2 for a tolerance of 10%. 1997 Nov 14 4 Philips Components Product specification NTC thermistors, accuracy line 2322 640 5.... RT-values and tolerance on RT-values Derating P (%) These thermistors have a narrow tolerance on the B-value, the result of which provides a very small tolerance on the nominal resistance value over a wide temperature range. MLC342 100 0 40 0 55 85 Tamb ( o C) 125 Fig.2 Power derating curve. Long term stability MLC382 MLC383 0.4 0.05 handbook, halfpage handbook, halfpage R 25 1 T (K) R25 (%) 0.2 1 0 2 2 0 0.05 3 3 0.2 10 2 103 test duration (h) 0.1 10 2 10 4 Curves valid for 2.2 to 10 k. Curve 3: minimum deviation. Curves valid for 2.2 to 10 k. Curve 1: minimum deviation. Curve 2: average deviation. Curve 3: maximum deviation. Fig.3 Fig.4 Curve 1: maximum deviation. Curve 2: average deviation. Long term stability of R25 as a function of test duration at maximum temperature (150 C). 1997 Nov 14 5 103 test duration (h) 10 4 Long term stability of T as a function of test duration at maximum temperature (150 C).