PTC Military Grade Thermistors Military Grade Leaded Thermistors tors meet or exceed the requirements of MIL- Tolerance Code Number of Zeros 1st 2 Resistance Digits Style Designation PRF-23648 including: * High temperature exposure * Vibration, high frequency * Shock, specified pulse * Seal * Immersion * Resistance to solvents Tolerance: K = 10% J = 5% Military Grade * Short time overload * Low temperature storage * High temperature storage * Terminal strength * Thermal shock * Resistance to soldering heat * Moisture resistance * Life Any of the above tests, or tests dictated by your application, can be performed at Quality Thermistor on the specific lot you are ordering. Contact QTI Technical Support for details. *COMMERCIAL GRADE AVAILABLE, CONTACT FACTORY FOR DETAILS TYPE RTH22 MIL-PRF-23648/9 OPERATING TEMP. RANGE -55C TO +125C STANDARD RESISTANCE RANGE 10 - 10K ohms POWER RATING AT 25C IN WATTS .500 @ 25C derate per Table 4 THERMAL TIME CONSTANT SECONDS MAXIMUM 60 RTH42 MIL-PRF-23648/19 -55C TO +125C 10 - 10K ohms .250 @ 25C derate per Table 4 60 1500 TO 5600 OHMS 0.515 0.730 0.825 1.000 1.230 1.450 1.670 1.960 6800 TO 10,000 OHMS 0.510 0.730 0.825 1.000 1.190 1.400 1.610 1.830 PTC TABLE 2 Resistance Multipliers for RTH22 TEMPERATURE 10 TO 68 OHMS -55C 0.615 -15C 0.790 0C 0.863 25C 1.000 50C 1.160 75C 1.350 100C 1.545 125C 1.750 180 TO 470 OHMS 0.560 0.755 0.838 1.000 1.180 1.400 1.623 1.860 82 TO 150 OHMS 0.582 0.770 0.847 1.000 1.170 1.370 1.584 1.800 PTC TABLE 3 Device Tolerance at Temperatures Other Than 25C SEQUENCE TEMPERATURE J +/-% K +/-% 1 -55C 20 25 2 -15C 13 18 3 0C 7 12 4 25C 5 10 5 50C 7 12 6 75C 9 14 7 100C 12 17 8 125C 15 20 800-554-4784 560 TO 1200 OHMS 0.550 0.740 0.835 1.000 1.200 1.420 1.656 1.920 180 TO 560 OHMS 0.560 0.755 0.838 1.000 1.180 1.400 1.623 1.860 680 TO 1500 OHMS 0.550 0.740 0.835 1.000 1.200 1.420 1.656 1.920 1.8K TO 10K OHMS 0.515 0.730 0.825 1.000 1.230 1.450 1.670 1.960 TABLE 4 Derating Curve for High Ambient Temperatures Percent of Maximum Power PTC TABLE 1 Resistance Multipliers for RTH42 TEMPERATURE 10 TO 68 OHMS 82 TO 150 OHMS -55C 0.615 0.582 -15C 0.790 0.770 0C 0.863 0.847 25C 1.000 1.000 50C 1.160 1.170 75C 1.350 1.370 100C 1.545 1.584 125C 1.750 1.800 100 25C 80 60 40 20 125C 0 -.55 -.20 w w w. t h e r m i s t o r. c o m 0 20 40 80 120 140 160 Ambient Temperature (C) 25 PTC THERMISTORS Ordering Information R T H 4 2 E S 2 02 J RTH42 and RTH22 Military Grade PTC thermis-