FEATURES * Welded construction * Inorganic and non-hygroscopic, Centohm coating seals and protects the resistance wire. * Centohm coating is flameproof and withstands temperatures in excess of 2000F. * 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 1/16" 1/32" 5/161/32 3/32 0.1 4K 5% 500 100 3/8 7/32 0.1 10K 5% 500 300 1 7/32 0.1 20K 5% 500 450 /2 11/16 7/32 0.1 30K 5% 500 600 15/16 7/32 0.1 40K 5% 500 800 5/16 0.1 50K 5% 500 875 1 5/16 0.1 90K 5% 500 1600 19/16 SPECIFICATIONS Material Coating: Flameproof proprietary Centohm Core: Ceramic Element: Copper-nickel alloy or nickel-chrome alloy depending on resistance value End Cap: Stainless steel E N V I R O N M E N TA L P E R F O R M A N C E Test Centohm Coated Axial Lead Wirewound Resistors 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. Lead Sizes: Alternate lead diameters available. Tape and Reel: Resistors taped for automatic insertion. Call the factory for size, quantity and ordering information Axiohm Series Leads: Tinned Copperweld 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 D C max clean B&S lead to (dia.) clean lead 13/32 #24 (.020") 15/32 #20 (.032") 19/32 #20 (.032") 13/16 #20 (.032") #20 (.032") 11/16 #20 (.032") 11/8 #20 (.032") 111/16 Non-Inductive Option (Add N) E = RoHS compliant Available Jan. 2006 Wattage Coating "C" for Standard 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., Suite 850, Rolling Meadows, IL 60008 * Tel. 1-866-9-OHMITE * Fax 1-847-574-7522 * www.ohmite.com * info@ohmite.com 19