sales and applications engineering 17271 north umpqua hwy. roseburg, oregon 97470-9422 phone: (541) 496-0700 fax: (541) 496-0408 28_il111.0817 to meet the precision temperature stability requirements of high accuracy, high voltage systems, caddock introduces the type tg low tc precision high voltage resistors. these resistors utilize our proven tetrinox ? resistance system to achieve the unique combination of low temperature coeffcient with high stability performance at high operating voltages. the type tg low tc precision high voltage resistors are designed to meet the demanding stability requirements of twt power supplies, electron microscopes, x-ray systems, high resolution crt displays, and geoph ysical instruments. type tg low tc precision high voltage resistors all type tg resistors are produced with caddock's non-inductive serpentine pattern. the performance features of the type tg low tc precision high voltage resistors are: ? t emperature coeffcient: 25 ppm/c from -55c to +125c. ? load life stability of 0.25% per 1,000 hours at +125c. ? resistance tolerance from 1.0% to 0.1%. ? resistance range from 1 megohm to 1,000 megohms. ? maximum continuous operating temperature of +225c. ? the low temperature coeffcient minimizes the self-drift due to power dissipation warm-up. tg985 tg980 TG950 tg931 tg1010 tg1015 tg940 tc of 25 ppm/c from -55c to +125c, resistance range from 1 megohm to 1,000 megohms 1.500 .125 (38.10 3.18) a b c ambient temperature, c 100 80 60 40 20 0 25 75 125 175 225 275 rated power or rated voltage, % derating curve: dimensions in inches and (millimeters) dielect. strength max. continuous oper. volt. watt- age model no. a b c dimensions in inches and (millimeters) resistance min. max. tg931 1.000 .060 (25.40 1.52) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg940 1.500 .060 (38.10 1.52) .315 .030 (8.00 .76) .040 .002 (1.02 .05) TG950 2.125 .060 (53.98 1.52) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg980 3.125 .060 (79.38 1.52) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg985 4.000 .120 (101.60 3.05) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg1010 5.000 .120 (127.00 3.05) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg1015 6.000 .120 (152.40 3.05) .350 .040 (8.89 1.02) .040 .002 (1.02 .05) 1.0 1.5 2.0 3.0 4.0 5.0 6.0 4,000 6,000 10,000 15,000 20,000 25,000 30,000 750 750 1,000 1,000 1,000 1,000 1,000 25 25 25 25 25 25 25 1 meg 1.5 meg 2 meg 3 meg 4 meg 5 meg 6 meg 50 meg 100 meg 200 meg 300 meg 400 meg 500 meg 1000 meg tcp pm/ c -15 min. 40 meg 64 meg 128 meg 192 meg 320 meg 400 meg 384 meg extended maximum continuous operating voltage rating maximum continuous operating voltages up to 60% higher than the values listed in the table can be achieved through special factory conditioning. to specify maximum continuous operating voltages above the values listed in the table, add a "-15" to the model number (example: TG950-15). note that the standard overload and overvoltage ratings do not apply to the "-15" resistors. resistance range for "-15" resistors shown in the table are from "-15 min." to "max." combine type tg and type tk resistors for low ratio tc tracking the type tg low tc precision high voltage resistors can be used in combination with the low absolute temperature coeffcient of the type tk low tc precision radial-lead film resistors (model tk233 with tc of 5 ppm/c) to achieve 30 ppm/c ratio tc without special matching. with special matching, a ratio tc of 10 ppm/c can be achieved. the low temperature coeffcient for both the type tg and type tk resistors will also minimize ratio drift due to power dissipation warm-up. specifcations: resistance tolerance: 1% (tolerances to 0.1% on special order). temperature coefficient: 25 ppm/c refer- enced to +25c, ? r taken at -55c and +125c. insulation resistance: 10,000 megohms, min. overload/overvoltage: 5 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds. ?r 0.20% max. thermal shock: mil-std-202, method 107, cond. b, ? r 0.20% max. moisture resistance: mil-std-202, method 106, ?r 0.20% max. load life: 1,000 hours at +125c at rated voltage, not to exceed rated power, ? r 0.25%. solderable leads encapsulation: high temperature silicone conformal. n non-inductive performance with caddock's exclusive design ? 2003-2017 caddock electronics, inc. e-mail: caddock@caddock.com ? web: www.caddock.com for caddock distributors listed by country see caddock.com/contact/dist.html electronics, inc.
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