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| riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 06/13 usr unr 2-0710 precision foil resistors type usr 2-0710 unr 2-0710 resistance range 1.0 ohms to 4.99 kohms 5.0 kohms to 300 kohms 1.0 ohms to 5.0 kohms power rating (70c) 0.4w (0.6w upon request) 0.6w 0.4w tolerances from 1.0 ohms from 5.0 ohms from 12.0 ohms from 25.0 ohms from 50.0 ohms 0.1% / 0.25% / 0.5% / 1% 0.05% / 0.1% / 0.25% / 0.5% / 1% 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1% 0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1% 0.005% / 0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1% stability 0.01% shelf life stability 25ppm / ?r after 1 year 50ppm / ?r after 3 year temperature coeffcient max. 5ppm/k (-55 to 155c) typ. 3ppm/k (-55 to 125c) upon request 1ppm/k (0 to 60c) and 1ppm/k (-55 to 125c) insolation resistance > 10gohm thermal emf < 0.1v/k operating temperature range -55 to 155c resistor material nicr-foil substrate al 2 o 3 aln housing pbtp / epoxy connector material cu tinned terminals 2 notes specially designed for ap - plications with fast changing electrical load specifications part description: part type - resistance - contact - grid type - tolerance - tcr example: unr 2-0710 3.7ohms j 0.5% 1ppm ordering information ? resistances from 1ohm to 300kohms ? power rating to 0.6watt ? resistance tolerances to 0.005% ? tcr to 1ppm/k ? load stability to 0.01% grid (e) 3.81mm (0.15inches) = d grid (e) 5.08mm (0.2inches) = j
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 06/13 0 20 40 60 80 100 120 50 70 85 100 115 130 145 155 power (% from nominal power) ambient temperature (c) derating temperature coeffcient specifications (continued) usr unr 2-0710 precision foil resistors dimensions -800 -600 -400 -200 0 200 400 600 800 -50 -25 0 25 50 75 100 125 -5ppm/k +5ppm/k nominal ?r/r nominal spread 2.3ppm/k nominal spread 2.3ppm/k temperature (c) ?r/r (ppm) dimension mm tol. (mm) inches tol. (inches) a 30.00 2.0 1.18 0.079 b 7.00 0.1 0.28 0.004 c 9.50 0.2 0.37 0.008 d 2.00 0.1 0.08 0.004 e1 3.81 0.1 0.15 0.004 e2 5.08 0.1 0.20 0.004 f 3.00 0.1 0.12 0.004 g ?0.60 0.1 ?0.02 0.004 |
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