PTC Military Grade Thermistors Military Grade Chip Thermistors Engineering Information Thermal time constant: Power rating: Dissipation constant: Resistance at 25C: 30 seconds max in still air .125 W at 25 c, derate to 0 at 125 1.25mW/C min in still air 10 ohms to 10Kohms (see table) Standard Configuration Silicon Core Military Grade PTC THERMISTORS The High-Rel Positive Temperature Coefficient chip thermistor is designed for wire bonding applications found in hybrid circuitry. The devices exhibit a linear Resistance vs. Temperature curve approximating 0.7%/C which make them the ideal solution for temperature compensation applications. scc (Defense Supply Center, Columbus) issued specification MIL-PRF-32192 dictating the performance and inspection requirements for these devices which includes a test for wire bonding integrity. Many leading Aerospace companies around the world have selected these components for their mission critical space flight applications. D Quality Thermistor has summarized the requirements of the MIL-PRF-32192 specification on this catalog page. The complete detailedMIL-PRF-32192 specification can be obtained by contacting the DSCC. Quality Thermistor, Inc. is AS9100 certified Metalized Terminations Dimension 10-12 15-1800 2200-4700 OHMS OHMS 5600 10000 L 0.032(0.812) 0.032(0.812) 0.038(0.965) 0.030(0.762) 0.022(0.558) W 0.032(0.812) 0.032(0.812) 0.038(0.965) 0.030(0.762) 0.022(0.558) T 0.028(0.711) 0.050(1.27) 0.072(1.828) 0.072(1.828) 0.072(1.828) +/-.010(0.254) OHMS OHMS OHMS Ordering Information M32192 E 1 W 500 1 J M Level Designator Tolerance Code 4th Resistance Digit 1st 3 Resistance Digits Termination Finish MIL-PRF-32192 Slash Sheet Designation Resistance/Temperature Ratio DSCC Drawing Number Percent of Maximum Power TABLE 1 Derating Curve for High Ambient Temperatures 100 25C 80 60 40 20 125C 0 -55 -20 0 20 40 80 120 140 160 Ambient Temperature (C) TABLE 2 Factors for determining resistance at various temperatures. TEMPERATURE 10-27 33-68 82-330 390-2.7k 3.3k-10k C OHMS OHMS OHMS OHMS OHMS -55C 0.552 0.519 0.493 0.481 0.493 -15C 0.739 0.728 0.716 0.709 0.717 0C 0.830 0.822 0.813 0.810 0.816 25C 1.000 1.000 1.000 1.000 1.000 50C 1.190 1.201 1.208 1.211 1.205 75C 1.408 1.411 1.441 1.446 1.430 100C 1.651 1.669 1.706 1.709 1.660 125C 1.908 1.940 1.993 1.983 1.862 26 TABLE 4 Termination Materials TYPE MATERIAL Epoxy Bondable Gold Epoxy Bondable Platinum Gold Epoxy Bondable Platinum Gold Epoxy Bondable Palladium Silver or Platinum Silver Epoxy Bondable Palladium Silver or Platinum Silver Wire Bondable Silver Wire Bondable Gold CODE G U T C D S W TABLE 3 Resistance tolerance at temperatures other than 25C. TEMPERATURE F G J K C PERCENT () PERCENT () PERCENT () PERCENT () -55C 15 17 20 25 -15C 9 10 13 18 0C 3 4 7 12 25C 1 2 5 10 50C 3 4 7 12 75C 5 6 9 14 100C 7 9 12 17 125C 10 12 15 20