PTC Military Grade Thermistors Military Grade Leaded Thermistors RTH42 and RTH22 Military Grade PTC thermistors meet or exceed the requirements of Ordering Information R T H 4 2 E S 2 02 J MIL-PRF-23648 including: * Short time overload * Low temperature storage * High temperature storage * Terminal strength * Thermal shock * Resistance to soldering heat * Moisture resistance * Life Tolerance Code Number of Zeros 1st 2 Resistance Digits Style Designation * High temperature exposure * Vibration, high frequency * Shock, specified pulse * Seal * Immersion * Resistance to solvents Tolerance: K = 10% J = 5% G = 2% F = 1% 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. 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 *Commercial grade available, contact factory for details PTC TABLE 1 Standard for RTH42 (MIL-PRF-23648/19) 10 10 TO 68 OHMS 0.615 0.790 0.863 1.000 1.160 1.350 1.545 1.750 82 TO 150 OHMS 0.582 0.770 0.847 1.000 1.170 1.370 1.584 1.800 180 TO 470 OHMS 0.560 0.755 0.838 1.000 1.180 1.400 1.623 1.860 560 TO 1200 OHMS 0.550 0.740 0.835 1.000 1.200 1.420 1.656 1.920 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 Standard for RTH22 (MIL-PRF-23648/9) 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 1.800 180 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 12K OHMS 0.515 0.730 0.825 1.000 1.230 1.450 1.670 1.960 15K TO 39K OHMS 0.481 0.712 0.814 1.000 1.210 1.430 1.670 1.900 PTC TABLE 3 Device Tolerance at Temperatures Other Than 25C SEQUENCE TEMPERATURE F +/-% G +/-% J +/-% K +/-% 1 -55C 15 17 20 25 2 -15C 9 10 13 18 3 0C 3 4 7 12 4 25C 1 2 5 10 5 50C 3 4 7 12 6 75C 5 6 9 14 7 100C 7 9 12 17 8 125C 10 12 15 20 TABLE 4 Derating Curve for High Ambient Temperatures Percent of Maximum Power P T C T H E R M I S T O R S TEMPERATURE -55C -15C 0C 25C 50C 75C 100C 125C 100 25C 80 60 40 20 125C 0 -.55 -.20 0 20 40 80 Ambient Temperature (C) 120 140 160