general specifications flanged resistors 250 watts, 100 model RFP-250-100RM resistive element: thick film substrate: beryllium oxide ceramic cover: alumina ceramic mounting flange: copper, nickel plated per qq-n-290 lead(s): 99.99% pure silver (.005?thk) outline drawing .120 dia thru. (2 places) .303 .210 max. .187 .125 .110 .120 .975 .488 .375 .1875 .725 .125 .370 rm rfp 250-100 flanged resistors features dc - 2.0 ghz 250 watts beo ceramic ? elded silver leads non-nichrome resistive element 100% tested ? 1 sales desk usa: v oice: (800) 544-2414 fax: (315) 432-9121 sales desk europe: v oice: (+44) 23 92 232392 fax: (+44) 23 92 251369 notes: t olerance is .010, unless otherwise specified. operating temperature is -55? to +150? (see chart). designed to meet or exceed applicable portions of mil-e-5400. all dimensions are in inches. lead length 0.15?minimum. specifications subject to change without notice. electrical specifications resistance value: 100 ohms, 5% frequency range: dc - 2.0 ghz power: 250 watts capacitance: 3.3 pf ver. 12/5/01
flanged resistors model RFP-250-100RM t ypical performance 2 sales desk usa: v oice: (800) 544-2414 fax: (315) 432-9121 sales desk europe: v oice: (+44) 23 92 232392 fax: (+44) 23 92 251369 power derating suggested mounting procedures min. .025 (2 places) suggested stress relief methods board lower than lead. with lead. board even scale: 1. make sure that the devices are mounted on flat surfaces (.001?under the device) to optimize the heat transfer. 2. drill & tap the heatsink for the appropriate thread size to be used. 3. coat heatsink with a minimum amount of high quality silicone grease (.001?max. thickness). 4. position device on mounting surface and secure using socket head screws, flat & split washers. torque screws to the appropriate value. make sure that the device is flat against the heatsink. (care should be taken to avoid upward pressure of the leads towards the lid). 5. solder leads in place using an sn63 type solder with a controlled temperature iron (210?). scale: board higher than lead. than lead. board lower not recommended application case temperature ? c % of rated power 150 125 100 75 50 25 100 75 25 50 0
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