Military Grade NTC THERMISTORS NTC Military Grade Thermistors Military Grade Chip Thermistors Engineering Information Screened, high-rel surface mount NTC thermistors Thermal Time Constant*: 8 seconds maximum. are provided in the EIA 0805 package. Resistance values are specified at 25C with resistances at other Dissipation Constant*: 2mW/C min. Power Rating: The thermistor shall be capable of dissipating a maximum power of .125 watt at 25C. Thermistors shall be derated in accordance with Table 1. Resistance At 25C: Zero power resistance values at 25C (See Table 2). temperatures calculated using the appropriate resistance vs. temperature tables. he data provided on this page outlines the DSCC (Defense Supply Center, Columbus) drawing MIL-PRF32192. The complete specifications can be obtained by contacting DSCC (Defense Supply Center, Columbus). Please contact Quality Thermistor Inc., for devices provided to the MIL-PRF-32192 (1206 package) specification. T *Thermal Time and Dissipation Constant may vary depending on mounting. Dimensions MIL-PRF-32192/4 NTC STYLE L = .078" +/- .008" W = .049" +/- .008" T = .055" Max BW = .020" +/- .005" Ordering Information M 3 21 9 2 A 4 B 10 0 2 J M Level Designator Tolerance Code # of Zeros 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 Ambient Temperature (C) 160 TABLE 3 Termination Materials TYPE MATERIAL Solderable Base metalization barrier metal, solder coated 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 B G U T C D S W TABLE 2 25C to 125C Ratio RATIO D (7.1) 47 Ohm to 250 Ohm 16 RATIO H (13.0) 470 Ohm to 1.5K Ohm RATIO L (16.1) 2K Ohm to 4.7K Ohm RATIO A (19.8) 5K Ohm to 20K Ohm RATIO B (29.4) 47K Ohm to 100K Ohm RATIO M (23.3) 100K Ohm to 200K Ohm RATIO N (38.5) 240K Ohm to 510K Ohm RATIO C (48.7) 750K Ohm to 2M Ohm RATIO R (62.5) 4.7M Ohm to 10M Ohm