1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 93 od/of/oa series little demon ? carbon composition molded od/of series (5% tol.) oa series (10%) series wattage ohms tolerance max. voltage dielectric vac od 0.25 2.2-5.6m 5% 250 500 of 0.50 2.2-20m 5% 350 700 oa 1.00 2.2-1m 10% 500 1000 series length max. diam. max. lead dia. od 0.276 / 7.0 0.098 / 2.5 0.024/0.60 of 0.406 /10.3 0.150 / 3.8 0.028/0.70 oa 0.591 /15.0 0.236 / 6.0 0.035/0.92 l d 1.135" 0. 12 / 28.83mm 3 (o a: 1.18" / 30.0mm) terminals solder-coated copper terminal. body molded phenolic tolerance 5% (od/of); 10% (oa) derating linearly from 100% @ +70c to 0% @ 130c 1 10 pulse power (w) 100 1,000 10,000 100,000 pulse width (s) 1 10 -1 10 -2 10 -3 10 -4 10 -5 10 -6 10 -7 single pulse power capability of od ohmites little demons are small, reliable carbon composition resistors with exceptional strength. they are made tough by a molding process that combines the terminals, insulation and resistive ele - ment into an integrated unit. along with their small size, little demons perform with low noise, dissipate heat rapidly and offer high temperature stability. color codes are readable even after prolonged use thanks to a very durable coating that resists abra - sions and chipping normally associated with auto - matic insertion equipment. fea tures ? molded insulation for high dielectric strength ? rugged construction ? high surge capabilities ? comparable to mil rc07, rc20, and rc32 types ? od/of series available in e24 values ? oa series available in e12 values series specifica tions characteristics dimensions (continued) discontinuance notice: oa series is not recommended for new de- signs. the oa series will no longer be available for new orders after 8-30-14. after this date existing stock will be sold until depleted.
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 94 tape/reel od of qty./reel 5000 3000 reel size (mm) 260 260 qty./carton 40,000 24,000 gross carton wt. (kg) 12 13 carton size (m 3 ) 0.04 0.04 ammo box od of tape width (mm) 52 52 qty./box 2000 2000 qty./carton 30,000 30,000 gross carton wt. (kg) 10 16 carton size (m3) 0.03 0.05 75mm 5 60mm 5 (od) 65mm 5 (of) 275mm 5 (od) 455mm 5 (of) 52.4mm +1.6 -1.4 6mm .5 5.08mm .38 0.5mm max. l 1 l 2 l 1 ? l 2 = 1mm max. 1mm max. 3.2mm min. 280mm (ref.) 260mm 5 60.4mm1 14.5mm .5 3mm 75mm 5 60.4mm 1 od/of/oa series little demon ? carbon composition molded od/of series (5% tol.) oa series (10%) p ackaging resisto r us e guidelines ba ke procedure ordering informa tion a. heat treatment 110c 10c 15 hours b. frequency of heat treatment 1 time only carbon composition resistors are manufactured by extruding a blend of carbon and organic binders inside a phenolic outer body. the extrusion is cut to length, leads inserted, cured, and marked to form a finished resistor. the carbon and binder mixture is adjusted to produce different resistance values. the resistors are sorted for 5%, 10%, and 20% tolerance values. carbon composition resistors are able to withstand larger short-term pulses and higher voltages than film resistors and are virtually impervious to esd events (electro-static dis- charge). carbon composition resistors are also sensitive to moisture and, therefore, storage recommendations should be adhered to. generally, any moisture absorbed during storage will be "baked out" during the soldering operation. if the prod - uct is stored properly the resistance shift during the soldering operation will be minimal, less than 2% or 3%. carbon composition resistors are highly hygroscopic and changes in resistance value can occur if too much moisture is absorbed. for this reason, it is recommended not to use water or water-soluble solvents to clean these components. alcohol or hydrocarbon solvents are recommended for rinsing. all resistors are packaged in sealed poly bags with desiccant to maintain a consistent humidity during storage. if parts are removed from the protective plastic bag they should be used as soon as possible or resealed in the plastic bag. storage: ohmite recommends storing carbon composition resistors in a controlled environment at a temperature of 5 to 35c and relative humidity of less than 60%. inventory should always be used on a first-in-first-out basis. d. cautions solderability: may be affected due to oxidization of lead wire resistance value: some units may not completely recover to original value. soldering heat: some treated product may have substantial resistance change during soldering operation. it is recom - mended that parts be tested to evaluate soldering heat effects. c. solder heat test after treatment solder dip type temp. time evaluation od 300c 3 sec within 3% of 350c 3 sec within 3% *depth of immersion: 3mm from the resistor body ? od/of series available in e24 values ? oa series available in e12 values series od of oa to lerance od, of:j =5 % oa: k = 10% ohms 68g = 6.8 680 =6 8 681 = 680 682 = 6,800 683 = 68,000 684 = 680,000 rohs compliant od683je-tr tape & reel optional
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