NTC Thermistor Coated Chip Style ADVANCED THERMAL PRODUCTS, Inc. .095" (typ.) Features: * Very fast response time * -50C to 150C operation * Epoxy or phenolic resin coatings * Values from 100 to 1 Meg * Bare or insulated lead wires * Time Constant: 10 sec. (max.) * Dissipation Factor: 1 mW/C (nom.) 1.5" (Min.) AWG #28 Solid Tinned Copper ATP Standard Values R25 () Part Number Material* 100 500 1,000 1,000 3,000 5,000 10,000 10,000 20,000 30,000 50,000 100k 250k 500k 1 Meg A1002 A5002 A1003 A1003 A3003 A5003 A1004 A1004 A2004 A3004 A5004 A1005 A2505 A5005 A1006 K K K Z Z Z Z C C D D D H H H * See R/T Tables on opposite page. Basic P/N Point Matched: Thermistor resistance value is specified at one temperature (25C standard). Tolerance is given as + % of nominal resistance. STANDARDS Code Tolerance -1 + 1% -2 + 2% -5 + 5% -10 + 10% Curve Matched:** Code Accuracy Thermistor accuracy guaranteed over a temperature range (0C to 70C standard). Often called interchangeable thermistors, these sensors allow direct replacement without the need for recalibration. -A3 + 1.0C -B3 + 0.5C -C3 + 0.2C TYPES OF THERMISTOR TOLERANCES Other temperature ranges available. **Contact factory to determine which parts are offered with curve matching. Material Tol. Code Point-match Temperature (C) (only used if other than 25C) Examples: A1003K-2 ................. Curve "K" Material, 1000 + 2% at 25C A1004Z-C3 ............... Curve "Z" Material, 10k at 25C with + 0.2C accuracy from 0C to 70C A5005H-5-150 .......... Curve "H" Material, 500k at 25C with tolerance rating of + 5% at 150C 46 Advanced Thermal Products, Inc. * P.O. Box 249 * 328 Ridgway Road * St. Marys, PA 15857 * Phone: 814-834-1541 Fax: 814-834-1556 * E-mail: sales@atpsensor.com * Web Site: www.atpsensor.com ATP Resistance vs. Temperature Conversion Table Coated Chip NTC Thermistor Material K Temp. Coef. @25C (25) -3.9%/C C Z -4.0%/C D -4.4%/C H -4.7%/C -5.3%/C Resistance Ratio R0 /R50 7.04 7.58 9.06 10.45 14.09 Beta (25/85) 3498 3694 3976 4262 4851 Temperature (F) (C) Rt R25 (%/C) Curve Dev. Rt R25 (%/C) Curve Dev. Rt R25 (%/C) Curve Dev. Rt R25 (%/C) Curve Dev. Rt R25 (%/C) Curve Dev. -58 -50 39.46 6.2 8.2 44.20 6.3 4.3 66.75 7.1 5.5 83.47 7.4 7.0 110.1 7.4 17.4 -40 -40 21.68 5.8 6.8 23.99 5.9 3.6 33.56 6.6 4.3 40.70 6.9 5.1 55.50 7.2 15.6 -22 -30 12.38 5.4 5.6 13.53 5.6 2.9 17.67 6.2 3.5 20.78 6.5 4.1 28.40 7.0 14.6 -4 -20 7.329 5.1 4.4 7.894 5.2 2.3 9.697 5.8 2.7 11.07 6.1 3.2 14.65 6.8 13.7 14 -10 4.482 4.8 3.3 4.755 4.9 1.7 5.530 5.4 2.0 6.124 5.7 2.4 7.609 6.4 11.7 32 0 2.825 4.5 2.3 2.949 4.6 1.2 3.265 5.1 1.4 3.510 5.4 1.6 4.094 6.0 9.9 50 10 1.830 4.2 1.2 1.879 4.4 0.7 1.990 4.8 0.8 2.078 5.1 1.0 2.277 5.7 8.2 68 20 1.216 4.0 0.3 1.227 4.1 0.2 1.249 4.5 0.3 1.267 4.8 0.3 1.306 5.4 6.6 77 25 1.000 3.9 0.0 1.000 4.0 0.0 1.000 4.4 0.0 1.000 4.7 0.0 1.000 5.3 5.9 86 30 0.8270 3.7 0.6 0.8196 3.9 0.2 0.8056 4.3 0.3 0.7943 4.5 0.3 0.7709 5.1 5.2 104 40 0.5747 3.5 1.4 0.5594 3.7 0.6 0.5325 4.0 0.7 0.5106 4.3 0.9 0.4674 4.9 3.7 122 50 0.4074 3.3 2.2 0.3893 3.5 1.0 0.3601 3.8 1.2 0.3360 4.1 1.4 0.2905 4.6 2.4 140 60 0.2942 3.2 3.0 0.2760 3.4 1.3 0.2487 3.6 1.6 0.2259 3.9 1.9 0.1848 4.4 1.1 158 70 0.2161 3.0 3.6 0.1990 3.2 1.7 0.1752 3.4 2.0 0.1550 3.7 2.3 0.1202 4.2 0.0 176 80 0.1612 2.9 4.3 0.1458 3.0 2.0 0.1256 3.2 2.3 0.1084 3.5 2.7 0.07980 4.0 1.0 185 85 0.1401 2.8 4.6 0.1255 3.0 2.2 0.1071 3.2 2.5 0.09121 3.4 2.9 0.06550 3.9 1.5 194 90 0.1221 2.7 4.9 0.1084 2.9 2.3 0.09162 3.1 2.7 0.07710 3.3 3.1 0.05400 3.8 2.1 212 100 0.09376 2.6 5.5 0.08169 2.8 2.5 0.06787 2.9 3.0 0.05574 3.2 3.5 0.03720 3.6 3.1 230 110 0.07292 2.5 6.1 0.06238 2.6 2.8 0.05102 2.8 3.3 0.04092 3.0 3.9 0.02618 3.5 4.0 248 120 0.05738 2.3 6.7 0.04822 2.5 3.0 0.03887 2.7 3.6 0.03047 2.9 4.2 0.01860 3.3 4.9 257 125 0.05112 2.3 6.9 0.04258 2.5 3.1 0.03409 2.6 3.8 0.02642 2.8 4.5 0.01580 3.2 5.3 266 130 0.03770 2.4 3.3 0.02999 2.5 3.9 0.02299 2.8 4.8 0.01340 3.2 5.8 284 140 0.02979 2.3 3.5 0.02342 2.4 4.1 0.01756 2.6 5.4 0.00980 3.1 6.6 302 150 0.02377 2.2 3.7 0.01849 2.3 4.4 0.01357 2.5 6.1 0.00730 2.9 7.3 This R/T Conversion Table is provided for reference only. ATP uses the Steinhart-Hart equation to calculate the nominal Rt/R25 value. 1C tables are available upon request. * * Rt/R25 - The ratio of the thermistor resistance at any temperature divided by its' resistance at 25C. For example, if you select a 10k at 25C thermistor in Material "Z", you can calculate its' nominal resistance at 100C to be 10,000 x .06787 = 678.7. - Negative Temperature Coefficient of Resistance expressed in %/C. This is the percentage change in thermistor resistance for a 1C change in its body temperature. is particularly useful in calculating the required resistance tolerance necessary to guarantee sensor accuracy. For example, a Material "C" thermistor has an of -3.5%/C at 50C. If you require a sensor that is accurate to within + 2.0C at 50C, the thermistor must have a resistance tolerance of + 2.0C x 3.5%/C= + 7.0%. * Curve Dev. -- Applies to thermistors that are point matched at 25C. The Curve Dev. (%) must be added to the thermistor tolerance at 25C to calculate the total tolerance or maximum deviation at any temperature. Curve Dev. accounts for the curve variance that occurs within any given batch or lot of thermistors. For example, if you specify a Material "Z" device with a + 5% tolerance at 25C, it will have a total tolerance at 80C of (+ 5%) +(2.3%)= 7.3%. Advanced Thermal Products, Inc. * P.O. Box 249 * 328 Ridgway Road * St. Marys, PA 15857 * Phone: 814-834-1541 Fax: 814-834-1556 * E-mail: sales@atpsensor.com * Web Site: www.atpsensor.com 47