g, gn vishay dale www.vishay.com 118 document number 30205 revision 06-apr-01 for technical questions, contact ww2bresistors@vishay .com features ? from 1.4 to 4 times higher power ratings than conventional resistors of equivalent size ? high temperature coating ? complete welded construction ? meets applicable requirements of mil-prf-26 ? available in non-inductive styles (type gn) with aryton- perry winding for lowest reactive components ? excellent stability in operation wirewound resistors, military, mil-prf-26 qualified, type rw, precision power, silicone coated ordering information g-3-80 10 ? 1.0% model resistance tolerance ? % parameter unit g resistor characteristics temperature coefficient ppm/?c 90 for below 1 ? , 50 for 1 ? to 9.9 ? , 20 for 10 ? and above dielectric withstanding voltage v ac 500 minimum for g-1-80 thru g-3-380, 1000 minimum for all others short time overload C 5 x rated power for 5 seconds for g-1-80 thru g-5c (characteristic u), 10 x rated power for 5 seconds for g-10 maximum working voltage v (p x r) 1/2 insulation resistance ? 1000 megohm minimum dry, 100 megohm minimum after moisture test terminal strength lb 5 minimum for g-1-80 thru g-3-380, 10 minimum for all others solderability C mil-prf-26 type - meets requirements of ansi j-std-002 non mil type - terminals are 60/40 electro tin plated to facilitate soldering operating temperature range c characteristic u = - 65/+ 250, characteristic v = - 65/+ 350 power rating C characteristic u - + 250 c max. hot spot temperature, 0.5% max. ? r in 2000 hr. load life characteristic v - + 350 c max. hot spot temperature, 3.0% max. ? r in 2000 hr. load life technical specifications standard electrical specifications resistance range mil. range shown in bold face *vishay dale g models have two power ratings, depending on operation temperature and stability requirements. note: shaded area indicates most popular models. model mil-prf-26 ? uv 0.5%, 1% type 0.05% thru 5% 3% & 5% 0.05% 0.1% 0.25% 3%, 5% g g-1-80 1.0 1.0 - 1k 0.499 - 1k 0.499 - 3.4k 0.1 - 3.4k 0.20 g-1-380 rw81 1.0 0.499 - 1k 0.499 - 1k 0.1 - 1k 0.20 g-2 1.5 1.0 - 1.3k 0.499 - 1.3k 0.499 - 4.9k 0.1 - 4.9k 0.21 g-3-80 2.0 1.0 - 2.74k 0.499 - 2.74k 0.499 - 10.4k 0.1 - 10.4k 0.34 g-3-380 rw80 2.0 0.499 - 2.74k 0.499 - 2.74k 0.1 - 2.74k 0.34 g-5 4.0 5.0 0.499 - 6.5k 0.499 - 6.5k 0.1 - 24.5k 0.1 - 24.5k 0.80 g-5c 5.0 7.0 0.499 - 8.6k 0.499 - 8.6k 0.1 - 32.3k 0.1 - 32.3k 1.20 g-10 7.0 10.0 0.499 - 25.7k 0.499 - 25.7k 0.1 - 95.2k 0.1 - 95.2k 3.60 power rating* p 25 c w weight (typical)
www.vishay.com 119 g, gn vishay dale document number 30205 revision 06-apr-01 for technical questions, contact ww2bresistors@vishay .com dimensions wirewound resistors, military, mil-prf-26 qualified, type rw, precision power, silicone coated model dimensions in inches [millimeters] ll 1 cd (max.)** g-1-80 0.250 0.031 0.281 0.085 0.020 0.020 0.002 g-1-380 [6.35 0.787] [7.14] [2.16 0.508] [0.508 0.051] g-2 0.312 0.016 0.328 0.078 + 0.016 - 0.031 0.020 0.002 [7.92 0.406] [8.33] [1.98 + 0.406 - 0.787] [0.508 0.051] g-3-80 0.406 0.031 0.437 0.094 0.031 0.020 0.002 g-3-380 [10.31 0.787] [11.10] [2.39 0.787] [0.508 0.051] g-5 0.562 0.062 0.622 0.188 0.032 0.032 0.002 [14.27 1.57] [15.80] [4.78 0.813] [0.813 0.051] g-5c 0.500 0.062 0.593 0.218 0.032 0.040 0.002 [12.70 1.57] [15.06] [5.54 0.813] [1.02 0.051] g-10 0.875 0.062 1.0 0.312 0.032 0.040 0.002 [22.23 1.57] [25.4] [7.92 0.813] [1.02 0.051] c d l 1.50 [38.10]* min. l 1 *on some standard reel pack methods, the leads may be trimmed to a shorter length than shown. **l 1 (max.) dimension is clean lead to clean lead. material specifications element: copper-nickel alloy or nickel-chrome alloy, depending on resistance value core: ceramic, beryllium oxide or alumina, depending on resistor model coating: special high temperature silicone standard terminals: tinned copperweld ? end caps: stainless steel part marking: dale, model, wattage*, value, tolerance, date code *wattage marked on part will be "u" characteristic performance test conditions of test test limits (characteristic u) thermal shock rated power applied until thermally stable, then a minimum of 15 minutes at - 55 c (0.2% + 0.05 ? ) ? r short time overload 5 x power (g-1-80 thru g-5c), 10 x power (g-10) for 5 seconds (0.2% + 0.05 ? ) ? r dielectric withstanding voltage 1000v rms, one minute (0.1% + 0.05 ? ) ? r low temperature storage - 65 c for 24 hours (0.2% + 0.05 ? ) ? r high temperature exposure 250 hours at + 250 (characteristic u) (0.5% + 0.05 ? ) ? r moisture resistance mil-std-202 method 106, 7b not applicable (0.2% + 0.05 ? ) ? r shock, specified pulse mil-std-202 method 213, 100g's for 6 milliseconds, 10 shocks (0.1% + 0.05 ? ) ? r vibration, high frequency frequency varied 10 to 2000hz, 20g peak, 2 directions 6 hours each (0.1% + 0.05 ? ) ? r load life 2000 hours at rated power, + 25 c, 1.5 hours on, 0.5 hours off (0.5% + 0.05 ? ) ? r terminal strength 5 to 10 sec., 5 or 10 lb pull test (depending on size), torsion test - 3 alternating directions, 360 c each (0.1% + 0.05 ? ) ? r gn non-inductive models of equivalent physical and electrical specifications are available with non-inductive (aryton-perry) winding. they are identified by inserting the letter n after g in the model number (gn-5, for example). two conditions apply: 1. for gn models, divide maximum resistance values by two 2. body o.d. on gn-5c may exceed that of the g-5c by 0.010" termination when g resistors will be operated at full rated power, resistance welding or high temperature solder are the recommended termination methods. termination should be made within 1/2 inch from end of resistor body. derating 120 100 80 60 40 20 0 -65 -50 0 50 150 250 350 ambient temperature in c rated power in % char. v char. u 25
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