1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 91 axiohm centohm coated axial terminal wirewound coating flameproof proprietary centohm core ceramic element copper-nickel alloy or nickel-chrome alloy depending on resistance value end cap stainless steel terminals tinned copper weld. rohs solder composition is 96% sn, 3.5% ag, 0.5% cu derating linearly from 100% @ +25c to 0% @ +350c. tolerance 5% (std) down to 0.1% available. power rating based on 25c free air rating (other wattages available). overload under 5 watts: 5 times rated wattage for 5 seconds. 5 watts and over: 10 times rated wattage for 5 seconds. temperature coefficient 30ppm /c above 10 100ppm/c 1 to 10 200ppm/c below 1 watt resistance standard dielectric maximum rating range ( ) resistance withstanding voltage form min. max. tolerance voltage rating 1c 0.1 4k 5% 500 100 2c 0.1 10k 5% 500 300 3c 0.1 20k 5% 500 450 4c 0.1 30k 5% 500 600 5c 0.1 40k 5% 500 800 7c 0.1 50k 5% 500 875 10c 0.1 90k 5% 500 1600 ohmites axiohm resis - tors are centohm coated for maximum reliability. these all-welded units are characterized by their low temperature coef - ficients and resistance to thermal shock, making them ideal for a wide range of electrical and electronic applications. f e a t u r e s ? welded construction ? inorganic and non-hygroscopic, centohm coating seals and protects the resistance wire. ? exceeds mil-r-26 moisture require- ments ? centohm resistors are designed to meet and exceed performance charac - teristics of vitreous enamel resistors. ? centohm is more cost effective than vitreous enamel. ? 5% resistance tolerance options noninductive: this specially designed version is wound using the ayrton-perry method. resistance tolerances: options include 5%, 1%, 0.5%, 0.25%, and 0.1% resistors. terminal sizes: alternate terminal diameters available. tape and reel: resistors taped for automatic insertion. contact ohmite for size, quantity and ordering infor - mation s eries specifica tions characteristics (continued)
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 92 w attage coating "c" for centohm example: std 3 watt, 10k 5% = 3cj10k non-inductive option (add n) to lerance j = 5% (standard) h = 3% f = 1% d = .5% q = .25% b = .1% resistance ( ) use "k" for 1000 multiplier; use "r " for decimal point e = rohs complian t watt c d max. rating a b wire gauge clean term. to clean form .063/1.60mm .031/0.79mm (dia.) term. in./mm 1c 0.313.031 / 7.95.79 0.094 / 2.39 #24 (.020) 0.406 / 10.31 2c 0.375 / 9.53 0.219 / 5.56 #20 (.032) 0.469 / 11.91 3c 0.5 / 12.7 0.219 / 5.56 #20 (.032) 0.594 / 15.09 4c 0.688 / 17.48 0.219 / 5.56 #20 (.032) 0.813 / 20.65 5c 0.938 / 23.83 0.219 / 5.56 #20 (.032) 1.063 / 27.00 7c 1 / 25.4 0.313 / 7.95 #20 (.032) 1.125 / 28.58 10c 1.563 / 39.7 0.313 / 7.95 #20 (.032) 1.688 / 42.67 ab 1.5 in. / 38.1mm c d test maximum temperature coefficient 30ppm/c above 10 100ppm/c 1 to 10 200ppm/c below 1 (2% + .05)?r (2% + .05)?r (0.1% + .05)?r (2% + .05)?r (2% + .05)?r (2% + .05)?r (2% + .05)?r (2% + .05)?r (3% + .05)?r (1% + .05)?r (in./mm) centohm coated axial terminal wirewound r values are maximums based on mil-r-26 testing requirements at 350c.
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