FEATURES * Welded construction * Inorganic and non-hygroscopic, Centohm coating seals and protects the resistance wire. * Exceeds MIL-R-26 moisture requirements * Centohm Resistors are designed to meet and exceed performance characteristics of vitreous enamel resistors. * Centohm is more cost effective than vitreous enamel. * 5% resistance tolerance Ohmite's Axiohm resistors are Centohm coated for maximum reliability. These all-welded units are characterized by their low temperature coefficients and resistance to thermal shock, making them ideal for a wide range of electrical and electronic applications. Watt Rating Form 1C 2C 3C 4C 5C 7C 10C 1.5 / 38.1 A Resistance Range Standard Dielectric Maximum () Resistance Withstanding Voltage A B Min. Max. Tolerance Voltage Rating .063" .031" 0.1 4K 5% 500 100 0.313.031 0.094 0.1 10K 5% 500 300 0.375 0.219 0.1 20K 5% 500 450 0.5 0.219 0.1 30K 5% 500 600 0.688 0.219 0.1 40K 5% 500 800 0.938 0.219 0.1 50K 5% 500 875 1 0.313 0.1 90K 5% 500 1600 1.563 0.313 SPECIFICATIONS Material Coating: Flameproof proprietary Centohm Core: Ceramic Element: Copper-nickel alloy or nickel-chrome alloy depending on resistance value End Cap: Stainless steel P E R F O R M A N C E D ATA Test Centohm Coated Axial Terminal Wirewound B C D OPTIONS Noninductive Resistors: These specially designed versions are wound using the Ayrton-Perry method. Controlled or Limited Inductance Resistors: Using special single windings, these versions limit the inductance to a specified value. 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 information Axiohm Series Terminals: Tinned Copper weld Derating Linearly from 100% @ +25C to 0% @ +350C. Electrical Tolerance: 5% (Std) down to 0.1% available. Power rating: Based on 25C free air rating (other wattages available). Temperature Coefficient Thermal Shock Short Time Overload Dielectric Low Temperature Storage High Temperature Exposure Moisture Resistance Shock Vibration Load Life Terminal Strength (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 Overload: Under 5 watts: 5 times rated wattage for 5 seconds. 5 watts and over: 10 times rated wattage for 5 seconds. Temperature coefficient: 0 30ppm /C above 10 0 100ppm/C 1 to 10 0 200ppm/C below 1 O R D E R I N G I N F O R M AT I O N Maximum 30ppm/C above 10 100ppm/C 1 to 10 200ppm/C below 1 C D Wire max clean Gauge term. to (dia.) clean term. #24 (.020") 0.406 #20 (.032") 0.469 #20 (.032") 0.594 #20 (.032") 0.813 #20 (.032") 1.063 #20 (.032") 1.125 #20 (.032") 1.688 Non-Inductive Option (Add N) E = RoHS compliant Wattage Coating "C" for Centohm Tolerance J = 5% (standard) H = 3% F = 1% D = .5% Q = .25% B = .1% Example: Std 3 watt, 10K 5% = 3CJ10K Resistance () use "K" for 1000 multiplier; use "R" for decimal point R values are maximums based on MIL-R-26 testing requirements at 350C. Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 * 1-866-9-OHMITE * Int'l 1-847-258-0300 * Fax 1-847-574-7522 * www.ohmite.com * info@ohmite.com 25