250 Watts, 50 General Specifications Resistive Element: Substrate: Cover: Mounting Flange: Lead(s): Features Flanged Terminations Model RFP-250-50TC Flanged Terminations Thick film Beryllium oxide ceramic Alumina ceramic Copper, nickel plated per QQ-N-290 99.99% pure silver (.005" thk) Electrical Specifications * DC - 3.0 GHz Resistance Value: Frequency Range: Power: V.S.W.R.: * 250 Watts * BeO Ceramic * Welded Silver Leads 50 ohms, 5% DC - 3.0 GHz 250 Watts 1.30:1 Notes: Tolerance is .010, unless otherwise specified. Operating temperature is -55C to +150C (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. * Non-Nichrome Resistive Element * Low VSWR * 100% Tested .210 MAX. .125 .187 Outline Drawing .487 .975 .120 .375 .187 RFP 250-50 TC .125 .375 .725 .120 DIA. THRU. (2 PLACES) VER. 12/5/01 Sales Desk USA: Voice: (800) 544-2414 Fax: (315) 432-9121 Sales Desk Europe: Voice: (+44) 23 92 232392 Fax: (+44) 23 92 251369 1 Flanged Terminations Model RFP-250-50TC Typical Performance Suggested Mounting Procedures Power Derating .025 MIN. (2 PLACES) % OF RATED POWER 100 BOARD LOWER THAN LEAD. 75 BOARD EVEN WITH LEAD. SUGGESTED STRESS RELIEF METHODS SCALE: 50 BOARD LOWER THAN LEAD. BOARD HIGHER THAN LEAD. NOT RECOMMENDED APPLICATION SCALE: 1. Make sure that the devices are mounted on flat surfaces (.001" under the device) to optimize the heat transfer. 25 0 25 50 75 100 CASE TEMPERATURE -- C 125 150 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 (210C). 2 Sales Desk USA: Voice: (800) 544-2414 Fax: (315) 432-9121 Sales Desk Europe: Voice: (+44) 23 92 232392 Fax: (+44) 23 92 251369