500 Series Non-inductive Bulk Ceramic Slab Resistors 500 Series Non-Inductive Bulk Ceramic Slab Resistors provide high power and energy dis- sipation in a compact size. The 500 Series design enables the designer to minimize resistor package size and cost while provid- ing unequaled performance and reliability. The slim, compact resistors offer a number of ter- mination options allowing easy configuration for specific requirements. Ohmite 500 Series non-inductive bulk ceramic slab resistors pro- vide excellent performance where high peak power or high-energy pulses must be handled FeatureS in a small size. The advantage of the bulk Inherently non-inductive, high reliability due to bulk construction is that it produces an inherently ceramic construction non-inductive resistor and it allows energy and 15 watts per inch of length power dissipation (type SP) power to be uniformly distributed through the entire ceramic resistor body there is no film Excellent pulse/overload capability or wire to fail. We offer a full line of rugged, Slim profile for excellent volumetric power efficiency reliable ceramic resistors including custom Resistance range from 0.2 to 870K (resistance range designs. Standard terminal mounting tabs are dependent on material type) tin plated steel which are soldered to the resis- tor body. Consult factory for other materials. Resistance tolerances 5, 10, 20% standard on individual components, available to 2% on assemblies Material typeS type Sp type aS type Ba Material composition type SP is Material composition type Material composition type BA is for- formulated to provide lower resis- AS is formulated to provide mulated to withstand high energy and tance values and higher derating high voltage and high energy high voltage applications where the temperatures.The higher derat- absorption in a singular pack- required resistance value is above the ing temperatures translates to a age. resistance values available in Type higher wattage per inch than other SP and Type AS resistors. Maximum Appplications material types. continuous operating temperature is specified at 230C. High voltage power supplies Appplications Capacitor charge/discharge Appplications Motor Drive Controls Pulse test equipment DC Coupling and Filter Cap Discharge Power Supplies Radar/broadcast transmit- Voltage Balancing Power Conditioning Equipment ters Pre-charge / Inrush Limit Soft Start/Current Limit Circuits Laser/imaging equipment Voltage Divider Dynamic Braking Filter Snubber Circuits Snubber RF Dummy Load Circuits Crowbar Capacitor Dump Circuits Measuring EMI / EFI Test Circuits Test Loads 138 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com500 Series Non-inductive Bulk Ceramic Slab Resistors SpeciFicationS Packaged assemblies Resistance Avg. Power Peak* Energy Peak* Weight Type Range () 40C Amb. (W) 40C Amb. (J) Voltage (Grams) Individual standard 502SP 0.2-110 30 150 900 15 components can be 503SP 0.3-190 45 290 1900 22.5 packaged in series, par- 504SP 0.4-280 60 480 2800 30 allel, or series/parallel 506SP 0.8-450 90 800 4700 45 arrays to optimize ener- 508SP 1.0-630 120 1100 6700 60 gy and power dissipa- 510SP 1.3-800 150 1400 8500 75 tion in available space. 502AS 51,200 12 1,500 8,500 16 503AS 92,200 18 2,700 16,000 24 Custom assembly pack- 504AS 133,200 24 4,000 23,000 32 ages are available. 505AS 174,200 30 5,200 30,000 40 *Based on energy absorption in less than 10 milliseconds. Energy 506AS 215,200 36 6,400 36,000 48 rating can be substantially greater for longer pulses. Allowable peak 507AS 256,200 42 7,700 43,000 56 energy/voltage will depend on the 508AS 297,200 48 8,900 50,000 64 resistance value. 509AS 338,200 54 10,100 57,000 72 510AS 379,200 60 11,400 65,000 80 502BA 1.2K-110K 10 700 3,000 503BA 2.2K-210K 14 1,200 5,400 504BA 3.2K-300K 20 1,800 8,000 506BA 5.2K-490K 30 2,900 13,000 508BA 7.2K-680K 38 4,100 18,000 510BA 9.2K-870K 48 5,200 22,000 characteriSticS SP: -55C to +350C Max. % change after 5 cycles 10 times +2% Operating Short Time Overload When required, Type SP material can with- rated power, 5 seconds on, 90 seconds Temperature stand short periods of use at red-heat condi- off tions, i.e. up to 550 to 600C Load Life Max. % chage after 1000 hrs. rated +5% AS & BA: -55C to +230C power 1 hours on hour off Temperature SP & AS: +0.0 to -0.08%/C Thermal Shock Max. % change after 10 cycles -55C to +3% Coefficient BA: +0.0 to -0.2%/C +125C Density SP & AS: 2.2 2.4 gm/cc Max. % change when tested per MIL- +5% Moisture Resistance BA: 2.2 2.6 gm / cc STD-202, Method 103 SP: 0.24 0.26 cal/gmC Specific Heat AS: 0.22 0.24 cal/gmC Derating Surface Temperature Rise BA: 0.22 0.28 cal /(gm C) 100 350 Typical for Resistor Thermal SP: 0.14 - 0.16 cal/(cm-C - sec) 40 300 SP 80 Midpoint with Conductivity AS: 0.003 0.006 cal/cm-C-sec 250 Horizontal Orientation in 60 BA: 0.14 0.16 cal /(c m C sec ) 200 Still Air SP AS 150 40 Size Standard units are 1 wide by 1/4 thick in AS 100 variable lengths of 2, 3, 4, 6, 8 and 10 inches. 20 230 350 50 Other lengths to 10 maximum are available. 0 0 Rated SP: 15 watts per inch of length based on 0 100 200 300 400 0 20 40 60 80 100 120 Ambient Temperature (C) % Rated Power Average 350C maximum operating temperature with Power 40C ambient. BA: based on 230C maximum operating tem- perature with 40C ambient. Derate linearly to 0 Watts at 230C Peak Impulse SP: Max 1000 Amps Current AS: Max 200 Amps For applications requiring higher current rat- ings contact factory. Ceramic Resistor Division 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com 139 % Rated Power Temperature Rise (C)