1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 145 characteristics tah series 20 watt to220 package thick film power resistance range 0.05 to 10k, other values available upon request tolerance <0.1: 5% only 0.1-1m: 5% std.; 1% available temperature coefficient referenced to 25c, ?r taken at +105c; 1 to 10: (100ppm+0.002)/c 10 & up: 50ppm/c max operating voltage 350v dielectric strength 1,800 vac power rating 20w @ 25c case temperature; see derating curve, below insulation resistance 10g min. momentary overload 2x rated power for 5 seconds where applied voltage 1.5 times max. operating voltage. ?r (0.3% + 0.001) max. case material kmc-125 epoxy terminal material copper terminal plating lead free solder (97% tin, 3% silver) mounting requires the use of a snap-on style heat sink. a thermal compound should be properly applied. solder process the tah20 cannot exceed 260c for more than 10 seconds during soldering process. load life mil-r-39009, 2000 hours @ rated pwr ?r = (1.0% + 0.001) thermal shock mil-r-std-202, method 107, cond. f ?r = (0.3% + 0.001) max high freq vibration mil-r-std-202, method 204, cond. d ?r = (0.2% + 0.001) max terminal strength mil-r-std-202, method 211, cond. a (pull test) 2.4n ?r = (0.2% + 0.001) max moisture resistance mil-r-std-202, method 106 ?r = (0.5% + 0.01) max derating 175 100 percent rated powe r bottom of base plate temperature, c 60 20 0 05 0 100 150 25 75 125 80 40 rated powe r, w atts 20/35 16/28 12/21 8/14 4/ 7 0 t ah/tc h tch ta h the tah20 is a completely encapsulated thick film resistor in the to220 package outline. rated for 20 watts @ 25c case temperature, these resistors are elec - trically isolated, and molded in a high temperature case. designed for heat sink mounting, the symmetrical package is ready for use with snap-on style heat sinks (we recommend use of thermal grease). the tah20 series has very low inductance, and available in a wide range of resis - tance values in standard 5% tolerance. 1% tolerance available by special order. features ? 20 watt power rating at 25c case temperature ? high pulse tolerant design ? quick-snap molded package ? very low inductance design ? resistor package electrically isolated from heat sink ? low thermal resistance to heat sink @ rth<6.25c/w ? tube packaging available a pplications ? frequency conversion ? high frequency balancing ? snubbers (continued)
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 146 dimensions (iin./mm) ordering in f ormation 0.400?0.420" (10.15?10.67mm) 0.630?0.650" (16.00?16.52mm) 0.450?0.550" (1 1.43?13.97mm) 0.100?0.160" (2.54?4.06mm) 0.045?0.055" (1.14?1.40mm) 0.026?0.034" (0.66?0.86mm) 0.190?0.210" (4.82?5.34mm) 0.1 15?0.135" (2.92?3.44mm) 0.016?0.024" (0.40?0.60mm) 0.060?0.080" (1.52?2.04mm) standard part numbers tah20p100rje tah20p10k0je tah20p10r0je tah20p150rje tah20p15r0je tah20p1k00je tah20p1k50je tah20p1r00je tah20p1r50je tah20p200rje tah20p20r0je tah20p220rje tah20p22r0je tah20p240rje tah20p24r0je tah20p2k00je tah20p2k20je tah20p2k40je tah20p2r00je tah20p2r20je tah20p2r40je tah20p330rje tah20p33r0je tah20p390rje tah20p39r0je tah20p3k30je tah20p3k90je tah20p3r30je tah20p3r90je tah20p470rje tah20p47r0je tah20p4k70je tah20p4r70je tah20p510rje tah20p51r0je tah20p5k10je tah20p5r10je tah20p750rje tah20p75r0je tah20p7k50je tah20p7r50je tah20pr050je tah20pr100je TAH20PR150JE tah20pr200je tah20pr220je tah20pr240je tah20pr330je tah20pr390je tah20pr470je tah20pr510je tah20pr750je ohm v alue example: 2r40 = 2.4 ohms 2k40 = 2400 ohms t olerance f = 1% j = 5% standard series tah20p10r0je package code rohs compliant non-compliant version unavailable tah series 20 watt to220 package thick film power this product is designed for use with proper heatsinking. maximum base plate temperature of the resistor must be monitored and kept within specified limits to establish the power rating. best technique is to attach a thermocouple to the side of the base plate of the resistor. temperature of plastic housing or heat sink cannot be used to establish rating of the resistor.
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