sales and corporate of?ce 1717 chicago avenue riverside, california 92507-2364 phone: (951) 788-1700 fax: (951) 369-1151 applications engineering 17271 north umpqua hwy. roseburg, oregon 97470-9422 phone: (541) 496-0700 fax: (541) 496-0408 e-mail: caddock@caddock.com ? web: www.caddock.com for caddock distributors listed by country see caddock.com/contact/dist.html ? 2004 caddock electronics, inc. ca d k do c 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 coef?cient 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 geophysical 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: ? temperature coef?cient: 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 coef?cient minimizes the self-drift due to power dissipation warm-up. tg 985 tg 980 tg 950 tg 931 tg 1010 tg 1015 tg 940 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 tempera ture, c 100 80 60 40 20 0 25 75 125 175 225 275 ra ted power or ra ted volt age, % derating curve: dimensions in inches and (millimeters) dielect . strength max. continuous oper . v olt. wa tt- age model no. a b c dimensions in inches and (millimeters) resistance min. max. tg 931 1.000 .060 (25.40 1.52) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg 940 1.500 .060 (38.10 1.52) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg 950 2.125 .060 (53.98 1.52) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg 980 3.125 .060 (79.38 1.52) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg 985 4.000 .120 (101.60 3.05) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg 1010 5.000 .120 (127.00 3.05) .315 .030 (8.00 .76) .040 .002 (1.02 .05) tg 1015 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 me g 100 me g 200 me g 300 me g 400 me g 500 me g 1000 me g tc ppm/ c -15 min. 40 me g 64 me g 128 me g 192 me g 320 me g 400 me g 384 me g 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 coef?cient of the type tk low tc precision radial-lead film resistors (model tk133 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 coef?cient for both the type tg and type tk resistors will also minimize ratio drift due to power dissipation warm-up. certain products shown in this catalog are covered by one or more patents, there are also patents pending. speci?cations: 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 conforma l. n non-inductive performance with caddock's exclusive design 28_il111.1004
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